GORMAN-RUPP T8A60-B/F Installation, Operation and Maintenance Manual

Brand: GORMAN-RUPP

Model: T8A60-B/F

Type: Installation, Operation and Maintenance Manual

This manual is also suitable for

May 25, 1988

OM- 01930-OB03

Rev. G 10/01/02

THE GORMAN-RUPP COMPANY D MANSFIELD, OHIO

GORMAN-RUPP OF CANADA LIMITED D ST. THOMAS, ONTARIO, CANADA Printed in U.S.A.

ECopyright by the Gorman-Rupp Company

INSTALLATION, OPERATION,

AND MAINTENANCE MANUAL

WITH PARTS LIST

T-SERIES PUMP

MODELS

T8A60 --- B

INCLUDING: /F, /FM

TABLE OF CONTENTS

INTRODUCTION PAGE I --- 1.................................................

SAFETY --- SECTION A PAGE A --- 1...........................................

INSTALLATION --- SECTION B PAGE B --- 1....................................

Pump Dimensions PAGE B --- 1.....................................................

PREINSTALLATION INSPECTION PAGE B --- 2............................................

POSITIONING PUMP PAGE B --- 2.......................................................

Lifting PAGE B --- 2.................................................................

Mounting PAGE B --- 2.............................................................

Clearance PAGE B --- 2.............................................................

SUCTION AND DISCHARGE PIPING PAGE B --- 2.........................................

Materials PAGE B --- 3..............................................................

Line Configuration PAGE B --- 3......................................................

Connections to Pump PAGE B --- 3..................................................

Gauges PAGE B --- 3...............................................................

SUCTION LINES PAGE B --- 3...........................................................

Fittings PAGE B --- 3...............................................................

Strainers PAGE B --- 3..............................................................

Sealing PAGE B --- 3...............................................................

Suction Lines In Sumps PAGE B --- 3.................................................

Suction Line P ositioning PAGE B --- 4................................................

DISCHARGE LINES PAGE B --- 4........................................................

Siphoning PAGE B --- 4.............................................................

Valves PAGE B --- 4................................................................

Bypass Lines PAGE B --- 5..........................................................

AUTOMATIC AIR RELE A SE VALVE PAGE B --- 6...........................................

Theory of Operation PAGE B --- 6....................................................

Air Release Valve Installation PAGE B --- 7............................................

ALIGNMENT PAGE B --- 7..............................................................

Coupled Drives PAGE B --- 8........................................................

V-Belt Drives PAGE B --- 8...........................................................

OPERATION --- SECTION C PAGE C --- 1......................................

PRIMING PAGE C --- 1.................................................................

STARTING PAGE C --- 1................................................................

Rotation PAGE C --- 1..............................................................

OPERATION PAGE C --- 2..............................................................

Lines With a Bypass PAGE C --- 2....................................................

Lines Without a Bypass PAGE C --- 2.................................................

Leakage PAGE C --- 2..............................................................

Liquid Temperature And Overheating PAGE C --- 2.....................................

Strainer Check PAGE C --- 3.........................................................

Pump Vacuum Check PAGE C --- 3..................................................

STOPPING PAGE C --- 3................................................................

Cold Weather Preservation PAGE C --- 3..............................................

BEARING TEMPERATURE CHECK PAGE C --- 3..........................................

TABLE OF CONTENTS

(continued)

TROUBLESHOOTING --- SECTION D PAGE D --- 1..............................

PREVENTIVE MAINTENANCE PAGE D --- 3...............................................

PUMP MAINTENANCE AND REPAIR --- SECTION E PAGE E --- 1................

PERFORMANCE CURVE PAGE E --- 1...................................................

PARTS LISTS:

Pump Model PAGE E --- 3..........................................................

Repair Rotating Assembly PAGE E --- 5...............................................

PUMP AND SEAL DISASSEMBLY AND REASSEMBLY PAGE E --- 6.........................

Back Cover And Wear Plate Removal PAGE E --- 6.....................................

Suction Check Valve Removal PAGE E --- 7...........................................

Rotating Assembly Removal PAGE E --- 7.............................................

Impeller Removal PAGE E --- 8......................................................

Seal Removal PAGE E --- 8..........................................................

Shaft and Bearing Removal and Disassembly PAGE E --- 8.............................

Shaft and Bearing Reassembly and Installation PAGE E --- 9............................

Seal Reassembly and Installation PAGE E --- 10........................................

Impeller Installation and Adjustment PAGE E --- 13......................................

Rotating Assembly Installation PAGE E --- 13...........................................

Suction Check V alve Installation PAGE E --- 14.........................................

Back Cover I nstallation PAGE E --- 14.................................................

PRESSURE RELIEF VALVE MAINTENANCE PAGE E --- 14..................................

Final Pump Assembly PAGE E --- 15..................................................

LUBRICATION PAGE E --- 15.............................................................

Seal Assembly PAGE E --- 15.........................................................

Bearings PAGE E --- 15..............................................................

Power Source PAGE E --- 15.........................................................

TSERIES

OM--01930--03

PAGE I -- 1INTRODUCTION

INTRODUCTION

Thank You for purchasing a Gorman-Rupppump.

Read this manual carefully to learn how to safely

install and operate your pump. Failure to do so

could result in personal injury or damage to the

pump.

This Installation, Operation, a nd Maintenance

manual is designed t o help you achieve the best

performance and longest life from your Gorman-

Rupp pump.

This pump is a T Series, semi-open impeller, self-

priming centrifugal model with a suction check

valve.Thepump isdesigned forhandlingmildcor-

rosives, mud and slurries containing large en-

trained solids. The basic material of construction

forwettedpartsis grayiron, withductile ironimpel-

ler and gray iron wearing parts.

If there are any questions regarding the pump or

its application which are not covered in this man-

ual or in other literature accompanying this unit,

please contact your Gorman-Rupp distributor:

The Gorman-Rupp Company

P.O. Box 1217

Mansfield, Ohio 44901--1217

Phone: (419) 755--1011

or:

Gorman-Rupp of Canada Limited

70 Burwell Road

St. Thomas, Ontario N5P 3R7

Phone: (519) 631--2870

F or information or technical assistance on the

powersource,contactthepower sourcemanufac-

turer’s local dealer or representative.

The following are used to alert maintenance personnel to procedures which require special attention, to

those which could damage equipment, a nd to those which could be dangerous to personnel:

Immediate hazardswhi chWILL resultin

severe personal injury or death. These

instructions describe the procedure re-

quired and the injury which will result

from failure to follow the procedure.

Hazards or unsafe practices which

COULD result in severe personal injury

or de ath. These instructions describe

the procedure required and the injury

which could result from failure to follow

the procedure.

HazardsorunsafepracticeswhichCOULD

result in minor personal injury or product

or property damage. These instructions

describe the requirements and the possi-

ble damagewhichcould result fromfailure

to follow the procedure.

NOTE

Instructions to aid in installation, operation, and

maintenance or which clarify a procedure.

TSERIES OM--01930--03

PAGE A -- 1SAFETY

SAFETY --- SECTION A

This information applies to T SERIES

Basic pumps. Gorman-Rupp has no

control over or particular knowledge of

the power source which will be used.

Refer to the manual accompanying the

power source before attempting to be-

gin operation.

Beforeattemptingtoope norservicethe

pump:

1. Familiarize yourself with this man-

ual.

2. Disconnect or lock out the power

sourcetoensurethatthepumpwill

remain inoperative.

3. Allow the pump to cool if over-

heated.

4. Check the temperature before

opening any covers, plates, or

plugs.

5. Close the suction and discharge

valves.

6. Vent the pump slowly and cau-

tiously.

7. Drain the pump.

This pump is designed to handle mild

corrosives, and industrial slurries con-

taininglargeentrainedsolids.Donotat-

tempt to pump volatile, flammable or

corrosive liquids which may damage

the pump or endanger personnel as a

result of pump failure.

After the pump has been positioned,

make certain that the pump and all pip-

ing connections are tight, properly sup-

ported and secure before operation.

Do not operate the pump without the

guards in place over the rotating parts.

Exposed rotating parts can catch cloth-

ing, fingers, ortools, causing severe in-

jury to personnel.

Do not remove plates, covers, gauges,

pipe plugs, or fittings from an over -

heatedpump.Vaporpressure withinthe

pump can cause parts being disen-

gagedtobe ejectedwithgreat force.Al-

low the pump to cool before servicing.

Do not operate the pump agai nst a

closed discharge valveforlongperiods

oftime.Ifoperatedagainstacloseddis-

charge valve, pump components will

deteriorate, and the liquid could come

to a boil, build pressure, and cause the

pump casing to rupture or explode.

Use lifting and moving equipment in

good repair and with adequate capacity

toprevent injuriesto personnel or dam-

age to equip ment. Suction and dis-

charge hose s and piping must be re-

moved from the pump before lifting.

OM--01930--03TSERIES

PAGE B -- 1INSTALLATION

INSTALLATION --- SECTION B

Review all SAFETY information in Section A.

Since pump installations are seldom identical, this

section offers only general recommendations and

practices required to inspect, position, and a r-

range the pump and piping.

Most of the information pertains to a standard

static lift application where the pump is posi-

tionedabovethefreelevelofliquidtobepumped.

If installedinafloodedsuctionapplicationwhere

the liquid is supplied to the pump under pressure,

some of the information such as mounting, line

configuration, and priming must be tailored to the

specific application. Since the pressure supplied

to the pump is critical to performance and safety,

be sure to limit the incoming pressure to 50% of

the maximum permissible operating pressure as

shown on the pump performance curve.

Forfurtherassistance, contactyourGorman -Rupp

distributor or the Gorman -Rupp Company.

Pump Dimensions

SeeFigure1fortheapproximatephysicaldimen-

sionsofthispump.

OUTLINE DRAWING

NOTE: OPTIONAL ASA OR DIN STANDARD SUCTION & DISCHARGE SPOOL FLANGES AV AILABLE

Figure 1. Pump Mo del T8A60-B

OM--01930--03 TSERIES

PAGE B -- 2 INSTALLATION

PREINST ALLATION INSPECTION

Thepumpassemblywas inspectedand testedbe-

foreshipment fromthe factory. Beforeinstallation,

inspect the pump fordamage whichmay have oc-

curred during shipment. Check as follows:

a. Inspectt hepumpforcracks,dents,damaged

threads, and other obvious damage.

b. Check for and tighten loose attaching hard-

ware. Since gaskets tend to shrink after dry-

ing, check for loose hardware at mating sur-

faces.

c. Carefully read all warnings and cautions con-

tained in this manual or affixed to the pump,

and perform all duties indicated. Note the di -

rection of rotation indicated on the pump.

Check that the pump shaft rotates counter-

clockwise when facing the impeller.

Only operate this pump in the direction in-

dicated by the arrow on the pump body

and on the accompanying decal. Refer to

ROTATION in OPERATION,SectionC.

d. Check levels and lubricate as necessary. Re-

fer to LUBRICATION in the MAINTENANCE

AND REPAIR section of this manual and per-

form duties as instructed.

e.Ifthepumpandpowersourcehavebeen

stored for more than 12 months, some of the

components or lubricants may have ex-

ceeded their maximum shelf life. These must

be inspected or replaced to ensure maxi-

mum pump service.

If the maximum shelf life has been exceeded, or if

anything appears to be abnormal, contact your

Gorman-Rupp distributor or the factory to deter-

minethe repairor updating policy. Donotputthe

pump into service until appropriate action has

been taken.

POSITIONING PUMP

Lifting

Use lifting equipment with a capacity of at least

6,000pounds (2721,6 kg).Thispump weighsap-

proximately 1,200 pounds ( 544,3 kg),notinclud-

ingthe weightof accessoriesand base. Customer

installed equipment such as suction and dis-

chargepipingmustberemovedbeforeattempting

to lift.

Thepumpassemblycanbeseriously

damaged ifthecablesorchainsusedtolift

and movetheunitareimproperlywrapped

around the pump.

Mounting

Locatethepumpinanaccessibleplaceascloseas

practicalto the liquidbeing pumped. Levelmount-

ing is essential for proper operation.

The pump may have to be supported or shimmed

to provide for level operation or to eliminate vibra-

tion.

Clearance

When positioning t he pump, allow a minimum

clearance of 24 inches (609,6 mm) in front of the

backcovertopermitremovalofthecover andeasy

access to the pump interior.

SUCTION AND DISCHARGE PIPING

Pump performance is a dversely effected by in-

creased suction lift, discharge elevation, and fric-

tion losses. See the performance curve and oper-

ating range shown on Page E-1 to be sure your

overall a pplication allows pump to operate within

thesafeoperationrange.

OM--01930--03TSERIES

PAGE B -- 3INSTALLATION

Materials

Either pipe or hose maybe used for suction and

discharge lines; however, the materials must be

compatiblewiththe liquidbeingpumped.I fhoseis

usedin suctionlines, it mustbe the rigid-wall, rein-

forcedtype to prevent collapseundersuction.Us-

ing piping couplings in suction lines is not recom-

mended.

Line Configuration

Keep suction and discharge lines as straight as

possible to minimize friction losses. Make mini-

mum use of elbows and fittings, which substan-

tiallyincreasefriction loss.Ifelbowsarenecessary,

use the long-radius type to minimize friction loss.

Connections to Pump

Before tightening a connecting flange, align it ex-

actlywith the pump port. Neverpulla pipe lineinto

place by tightening t he flange bolts and/or cou-

plings.

Lines near the pump must be independently sup-

ported to avoid strain on the pump which could

cause excessive vibration, decreased bearing life,

and increased shaft and seal wear. If hose-type

linesareused,t heyshouldhaveadequatesupport

to secure them when filled with liquid and under

pressure.

Gauges

Most pumps are drilled and tapped for installing

discharge pressure and vacuum suction gauges.

If these gauges are desired for pumps that a re not

tapped, drill and tap the suction and discharge

lines not less than 18 inches (457,2 mm) from the

suction and discharge ports and install the lines.

Installationcloser to the pump mayresult in erratic

readings.

SUCTION LINES

Toavoidairpocketswhichcouldaffectpumpprim-

ing, the suction linemust be as shortand directas

possible.Whenoperationinvolvesasuctionlift,the

line must always slope upward to the pump from

the source of the liquid being pumped; if the line

slopes down to the pump at any point along the

suction run, air pockets will be created.

Fitti ngs

Suctionlinesshould be thesame size as thepump

inlet. If reducers are used in suction lines, they

should be the eccentric type, and should be in-

stalled with the flat part ofthe reducers uppermost

to avoid creating air pockets. Valves are not nor-

mally used in suction lines, but if a valve is used,

install it with the stem horizontal to avoid air pock-

ets.

Strainers

If a strainer is furnished with the pump, be certain

touseit;anysphericalsolidsw hichpassthrougha

strainer furnished with the pump will also pass

through the pump itself.

If a strainer is not furnished with the pump, but is

installed by the pump user, make certain that the

total a rea of the openings in the strainer is at least

three or four times the cross section of t he suction

line,a nd that the openingswillnot permit passage

of solids larger than the solids handling capability

of the pump.

Thispumpisdesignedtohandleupto3inch(76, 2)

diameter spherical solids.

Sealing

Since even a slight leak will affect priming, head,

and capacity, especially when operating with a

highsuction lift, all connections inthe suction line

should be sealed with pipe dope to ensure an air-

tight seal. Follow the sealant manufacturer’s rec-

ommendations when selecting and applying the

pipe dope. The pipe dope should be compatible

with the liquid being pumped.

Suction Lines In Sumps

If a single suction line is installed in a sump, it

should be positioned away from the wall of the

sumpata distanceequal to11/2times the diame-

ter of the suction line.

OM--01930--03 TSERIES

PAGE B -- 4 INSTALLATION

If there is a liquid flow from an open pipe into the

sump, the flow should be kept away from the suc-

tioninletbecause the infloww illcarry airdowninto

the sump, and air entering the suction line will re-

duce pump efficiency.

Ifitis necessary to positioninflow close to the suc-

tioninlet,installa bafflebetween theinflowandthe

suction inlet at a distance 1 1/2 times the diameter

of the suction pipe. The baffle will allow entrained

air to escape from the liquid before it is drawn into

the suction inlet.

If two suction lines are installed in a single sump,

theflowpathsmayinteract,reducingtheefficiency

of one or both pumps. To avoid this, position the

suction inlets so that they are separated by a dis-

tance equal to at least 3 times the diameter of the

suction pipe.

Suction Line Positioning

The depth of submergence of the suction line is

critical toefficient pumpoperation. Figure 2shows

recommended minimum submergence vs. veloc-

ity.

NOTE

The pipe submergence required may be reduced

byinstallinga standard pipe increaser fitting atthe

endof thesuction line.Thelarger opening size will

reduce the inlet velocity. Calculate the required

submergence using the following formula based

on the increased opening size (area or diameter).

Figure 2. Recommended Minimum Suction Line Submergence vs. Velocity

DISCHARGE LINES

Siphoning

Donotterminate the discharge lineat a levellower

than that of the liquid being pumped unless a si -

phon breaker is used in the line. Otherwise, a si-

phoning action causing damage to the pump

could result.

Valves

If a throttling valve is desired in the discharge line,

useavalveaslargeasthelargestpipetominimize

OM--01930--03TSERIES

PAGE B -- 5INSTALLATION

friction losses. Never install a throttling valve in a

suction line.

Withhighdischargeheads,itisrecommendedthat

a throttling valve and a system check valve be in -

stalled in the discharge line to protect the pump

from excessive shock pressure and reverse rota -

tion when it is stopped.

If theapplication involves a highdischarge

head, gradually close the discharge

throttling valve before stopping the pump.

Bypass Lines

Self-priming pumps are not air compressors. Dur-

ingthepriming cycle,airfrom thesuction line must

be vented to atmosphere on the discharge side. If

the discharge line is open, this air will be vented

through the discharge. However, if a check valve

has been installed in the discharge line, the dis-

chargesideofthepumpmustbeopenedtoatmos-

phericpressurethroughabypasslineinstalledbe-

tween the pump discharge and the check valve. A

self-priming centrifugal pump will not prime if

there is sufficient static liquid head to hold the dis -

charge check valve closed.

NOTE

Thebypass line should be sized so thatit does not

affect pump discharge capacity; however, the by-

pass line should be at least 1 inch in diameter to

minimize the chance of plugging.

Inlow discharge head applications (less than30

feet),itisrecommendedthatthebypasslineberun

back to the wet well, and located 6 inches below

the water level or cut-off point of the low level

pump. In some installations, this bypass line may

beterminatedwithasix-to-eightfootlengthof11/4

inch I.D . smooth-bore hose; air and liquid vented

during the priming process will then agitate the

hose and break up any solids, grease, or other

substances likely to cause clogging.

Abypasslinethatisreturnedtoawetwell

must be secured againstbeing drawn into

the pump suction inlet.

It is also recommended that pipe unions be in-

stalled at each 90_ elbow in a bypass line to ease

disassembly and maintenance.

In high discharge head applications (more than

30 feet), an excessive amount of liquid may be by-

passed and forced back to the w et well under the

full working pressure of the pump; this willreduce

overallpumpingefficiency. Therefore, itisrecom-

mended that a Go rman-Rupp Automatic AirRe-

lease Valve be installed in the bypass line.

Gorman-Rupp Automatic Air Release Valves are

reliable, and require minimum maintenance. See

AUTOMATICAIR RELEASE VALVEin thissection

for installation and theory of operation of the Auto-

matic Air Release Valve. Consult your Gorman-

Rupp distributor, or contact the Gorman-Rupp

CompanyforselectionofanAutomaticAirRelease

V alve to fit your application.

If theinstallationinvolvesafloodedsuctionsuchas

abelow-groundliftstation.Apipeunionandmanu-

alshut-offvalvemaybe installedin thebleedlineto

allowserviceofthevalvewithoutshuttingdownthe

station, and to eliminate the possibility of flooding.

If a manual shut-off valve is installed anywhere in

theairreleasepiping, itmustbeafull-openingball

type valve to prevent plugging by solids.

If a manual shut-off v alve is installed in

a bypass line, it must not be left closed

duringoperation

.Aclosedmanualshut-

off valve may cause a pump which has

lost prime to continue to operate with-

out reaching prime, causing dangerous

overheating and possible explosive

rupture of the pump casing. P

ersonnel

could be severely injured.

Allow an over-heated pump to cool be-

fore servicing. Do not remove plates,

OM--01930--03 TSERIES

PAGE B -- 6 INSTALLATION

covers,gauges, orfittingsfroman over-

heated pump. Liquid within the pump

canreachboiling temperatures,andva-

porpressure within the pumpcancause

parts being disengag ed to be ejected

with great force. After the pump cools,

drain the liquid from the pump by re-

moving the casing drain plug. Use cau -

tion when removing the plug to prevent

injury to personnel from hot liquid.

AUTOMATIC AIR RELEASE VALVE

When properly installed and correctly adjusted to

the specific hydraulic operating conditions of the

application, the Gorman-Rupp Automatic Air Re-

leaseValvewillpermitairtoescapethroughtheby-

pass line, and then close automatically when the

pump is fully primed and pumping at full capacity.

Theory of Operation

Figures 3 and 4 show a cross-sectionalview of the

AutomaticAir Release Valve, and a corresponding

description of operation.

Figure3.ValveinOpenPosition

Duringtheprimingcycle,airfromthe pumpcasing

flowsthroughthebypassline,andpassesthrough

theAirReleaseValvetothewetwell(Figure3).

Figure 4. Valve in Closed Position

When the pump is fully primed, pressure resulting

from flow against the valve diaphragm com-

presses the spring and closesthe valve(Figure 4).

The valve will remain closed, reducing the bypass

ofliquidto1to5gallonsperminute,untilthepump

loses its prime or stops.

Some leakage (1 to 5 gallons pe r min-

ute) will occur when the v alve is fully

closed. Be sure thebypasslineisdi-

rected back to the wet well or tank to

prevent hazardous spills.

Whenthepumpshutsdown, thespringreturnsthe

diaphragm to its original position. Any solids that

mayhaveaccumulatedint he diaphragmchamber

settle to the bottom and are flushed out during the

next priming cycle.

NOTE

The valve will remain open if the pump does not

reach its designed capacity or he ad. Valve closing

pressureis dependentuponthe discharge head of

the pump at full c apacity. The range of the valve

closing pressure is established by the tension rate

ofthespringasorderedfromthefactory.Valveclos-

ing pressure can be further adjusted to the exact

system requirements by moving the spring retain-

ing pin up or down the plunger rod to increase or

decreasetensionon the spring. Contact your Gor-

man -Rupp distributor or the Gorman-Rupp Com -

pany for information about an Automatic Air Re-

lease Valve for your specific application.

OM--01930--03TSERIES

PAGE B -- 7INSTALLATION

Air Release Valve Installation

The Automatic Air Release Valve must be inde-

pendently mounted in a horizontal position and

connected to the discharge line of theself-priming

centrifugal pump (see Figure 5).

NOTE

IftheAirReleaseValveistobeinstalledonastaged

pump application, contact the factory for specific

installation instructions.

DISCHARGE PIPE

DISCHARGE

CHECK VALVE

PUMP DISCHARGE

SELF-PRIMING

CENTRIFUGAL

PUMP

SUCTION

LINE

SUPPORT

BRACKET

CLEAN-OUT

COVER

INSTALL AIR RELEASE VALVE

IN HORIZONTAL POSITION

90_ LONG

RADIUS

ELBOW

BLEED LINE 1”

(25,4 MM) DIA. MIN.

(CUSTOMER

FURNISHED)

EXTEND 6”

(152,4 MM)

BELOW LIQUID

WET WELL

OR SUMP

LEVEL SURFACE

Figure 5. Typical Automatic Air Release Valve Installation

The valve inlet line must be installed between the

pumpdischargeportandthenon-pressurizedside

of the discharge check valve. The valve inlet is a t

thelargeendofthevalvebody,andisprovided

with standard 1 inch NPT pipe threads.

The valve outlet is located at the opposite end of

the valve, and is also equipped with standard 1

inch NPT pipe threads. The outlet should be con-

nectedtoableedlinewhichs lopesbacktothewet

wellorsump. Thebleed line must be thesame size

astheinlet piping,orlarger.Ifpiping isusedforthe

bleed line, avoid the use of elbows wh enever pos-

sible.

NOTE

It is recommended that each Air Release Valve be

fitted with an independent bleeder line directed

back to the wet well. However, if multiple Air Re -

lease Valves are installed in a system, the bleeder

lines may be directed to a common manifold pipe.

Contact your Gorman-Rupp distributor or the Gor-

man -Rupp Companyfor information about installa-

tion of an Automatic Air Release Valvefor your spe-

cific application.

ALIGNMENT

Thealignmentofthe pumpand itspowersourceis

critical for trouble-free mechanical operation. In

either a flexible coupling or V-belt driven s ystem,

thedrivera nd pumpmust bemountedsothattheir

shaftsare alignedwithandparallel toeach other.It

is imperative that alignment be checked after the

pump and piping are installed, and before opera-

tion.

NOTE

Check Rotation, Section C, before final alignment

of the pump.

WhenmountedattheGorman-Ruppfactory,driver

andpumparealignedbeforeshipment.Misalign-

OM--01930--03 TSERIES

PAGE B -- 8 INSTALLATION

ment will occur in transit and handling. Pumps

must be checked and realigned before operation.

Beforechecking alignment, tighten t he foundation

bolts. The pump casing feet and/or pedestal feet,

andthedrivermountingboltsshouldalsobetightly

secured.

When chec ki ng alignment, disconnect

the power source to ensure that the

pump will remain inoperative.

Adjusting the alignment in one direction

may alter the alignment in another direc-

tion. check each procedure after altering

alignment.

Coupled Drives

When using couplings, the axis of the power

source must be aligned to the axis of the pump

shaft in both the horizontal and vertical pla nes.

Mostcouplings requirea specificgap orclearance

between the drivingand the drivenshafts. Refer to

the coupling manufacturer’s service literature.

Alignspiderinserttypecouplingsbyusingcalipers

to measure the dimensions on the circumference

of the outer ends of the coupling hub every 90 de-

grees. The coupling is in alignment when the hub

ends are the same distance apart at all points(see

Figure 6).

Figure 6. Aligning Spider-Type Couplings

Figure 7. Aligning Non-Spider Type Couplings

Align non-spider type couplings by using a feeler

gaugeortapergaugebetweenthecouplinghalves

every 90 degrees. The coupling is in alignment

whenthehubsarethesamedistanceapartatall

points (see Figure 7).

Checkparallela dj ustmentbylayingastraightedge

across both coupling rims at the top, bottom, and

side. When the straightedge rests evenly on both

halves of the coupling, the coupling is in horizontal

parallel alignment. If the coupling is misaligned,

use a feeler gauge between the coupling and the

straightedge to measure the amount of misalign-

ment.

V-Belt Drives

When using V-belt drives, the power source and

the pump must be parallel. Use a straightedge

alongthesidesofthepulleystoensurethatthepul-

leys are properly aligned (see Figure 8). In drive

systemsusingtwoormorebelts,makecertainthat

the belts are a matched set; unmatched sets will

cause accelerated belt wear.

MISALIGNE D:

SHAFTS

NOT P

LLEL

MISALIGNE D:

SHAFTS

NOT IN LINE

ALIGNED: SHAFTS

PARALLEL AND

SHE

ES IN LINE

Figure 8. Alignment of V-Belt Driven Pumps

OM--01930--03TSERIES

PAGE B -- 9INSTALLATION

Tightenthebeltsinaccordancewiththebeltmanu-

facturer’s instructions. If the belts are too loose,

they w ill slip; if the belts are too tight, there w ill be

excessivepower lossand possible bearing failure.

Select pulleys that will match the proper speed ra-

tio; overspeeding the pump may damage both

pump and power source.

Do not operate the pump without the

guards in place over the rotating parts.

Exposed rotating parts can catch cloth-

ing, fingers, ortools, causing severe in-

jury to personnel.

T-SERIES

OM--01930--03

OPERATION PAGE C -- 1

OPERATION --- SECTION C

Review all SAFETY information in Section A.

F ollow the instructions on all tags, labels and de-

cals attached to the pump.

This pump is designed to handle mild

corrosives, and industrial slurries con-

taininglargeentrainedsolids.Donotat-

tempt to pump volatile, flammable or

corrosive liquids which may damage

the pump or endanger personnel as a

result of pump failure.

Pump speed and operating conditions

must be within the performance range

shownonpageE-1.

PRIMING

Install the pump and piping as described in IN-

ST ALLATION. Make sure t hat the piping connec-

tions are tight, and that the pump is securely

mounted. Check that the pump is properly lubri-

cated (see LUBRICATION in MAINTENANCE

AND REPAIR).

This pump is self-priming, but the pump should

never be operated unless there is liquid in the

pump casing.

Never operate this pump unless there is

liquid in the pump casing. The pump will

not prime whendry. extended operationof

a dry pump will destroy the seal assembly.

Add liquid to the pump casing when:

1. The pump is being put into service for the

first time.

2. Thepump hasnotbeenusedforaconsider-

able length of time.

3. The liquid in the pump casing has evapo -

rated.

Once the pump casing has been filled, the pump

will prime and reprime as necessary.

After filling the pump casing, reinstall

and tighte n the fill plug . Do not attempt

to operate the pump unle ss allconnect-

ing piping is securely installed. Other-

wise, liquid in the pump forced out

under pressure c ould c ause injury to

personne l.

To fillthe pump, remove the pump casing fill cover

or fill plug in the top of the casing, and add clean

liquid until the casing is filled. Replace the fill cover

or fill plug before operatin g the pump.

STARTING

Consult the operations manual furnished with the

power source.

Rotation

The correct direction of pump rotation is counter -

clockwise when facing the impeller. The pump

could be damaged and performance adverselyaf -

fected by incorrect rotation. If pump performance

is not within the specified limits (see the curve on

page E-1), check the direction of power source ro-

tation before further troubleshooting.

If an electric motor is used to drive the pump, re-

move V-belts, couplings, or otherwise disconnect

the pump from the motor before checking motor

rotation. Operate the motor independently while

observing t he direction of the motor shaft, or cool-

ing fan.

T-SERIESOM--01930--03

OPERATIONPAGE C -- 2

Ifrotation isincorrect onathree-phasemotor,have

a qualified electrician interchange any t wo of the

three phase wires tochangedirection.Ifrotationis

incorrect on a single-phasemotor, consult theliter-

ature supplied with the motor for specific instruc-

tions.

OPERATION

Lines With a Bypass

IfaGorman -RuppAutomaticAirReleaseValvehas

been installed, the valve will automatically open to

allow the pump to prime, and automatically close

after priming is complete (see INSTALLATION for

Air Release Valve operation).

If the bypass line is open, air from the suction l ine

willbe discharged throughthe bypassline back to

the wet well during the priming cycle. Liquid will

then continue to circulate through the bypass line

while the pump is in operation.

Lines Without a Bypass

Open all valves in the discharge line and start the

power source. Priming is indicated by a positive

reading on the discharge pressure gauge or by a

quieteroperation. Thepump mayn ot primeimme-

diately because the suction line must first fill with

liquid.Ifthe pumpfailstoprimewithinfiveminutes,

stop it and check the suction line for leaks.

Afterthepumphasbeenprimed,partiallyclosethe

discharge line throttling valve in order tofill the line

slowly and guard against excessive shock pres-

sure which could damage pipe ends, gaskets,

sprinkler heads, and any other fixtures connected

to the line. When the discharge line is completely

filled,adjust thethrottlingvalvetothe requiredflow

rate.

Do not operate the pump agai nst a

closed discharge throttling valve for

longperiodsoftime.Ifoperatedagainst

a closed discharge throttling valve,

pump components will deteriorate, and

the liquid could come to a boil, buil d

pressure,andcausethepumpcasingto

rupture or explode.

Leakage

No leakage should be visible at pump mating sur-

faces, or at pump connections or fittings. Keep all

lineconnectionsandfittings tighttomaintainmaxi -

mum pump efficiency.

Liquid Temperature And Overheating

The maximum liquid temperature for this pump is

160_ F(71_ C).Donot applyit ata higheroperat-

ing temperature.

Overheating can occur if operated with the valves

in the suction or discharge lines closed. Operating

against closed valves could bring the liquid to a

boil, build pressure, a nd cause the pump to rup-

ture or explode. If overheating occurs, stop the

pump and allow it to cool before servicing it. Refill

the pump casing with cool liquid.

Allow an over-heated pump to cool be-

fore servicing. Do not remove plates,

covers,gauges, orfittingsfroman over-

heated pump. Liquid within the pump

canreachboiling temperatures,andva-

porpressure within the pumpcancause

parts being disengag ed to be ejected

with great force. After the pump cools

drain the liquid from the pump by re-

moving the casing drain plug. Use cau -

tion when removing the plug to prevent

injury to personnel from hot liquid.

Asasafeguardagainstrupture orexplosion dueto

heat, this pump is equipped with a pressure relief

valve which will open if vapor pressure within the

pumpcasingreachesacriticalpoint.Ifoverheating

does occur, stop the pump immediately and allow

it to cool before servicing it. Approach any over-

heated pump cautiously. It is recommended that

the pressure relief valve a ssembly be replaced at

each overhaul, or any time the pump casing over-

heats and activates the valve. Never replace this

valve w ith a substitute which has not been speci-

fied or provided by the Gorman-Rupp Company.

T-SERIES

OM--01930--03

OPERATION PAGE C -- 3

Strainer Check

If a suction strainer has been shipped with the

pump or installed by the user, check the strainer

regularly, and clean it as necessary. The strainer

shouldalsobecheckedifpumpflow ratebeginsto

drop. If a vacuum suction gauge has been in -

stalled, monitor and record the readings regularly

to detect strainer blockage.

Never introduce air or steam pressure into the

pump casingorpiping to remove a blockage. This

could result in personal injury or damage to the

equipment. If backflushing is absolutely neces-

sary, liquid pressure must be limited to 50% of the

maximum permissible operating pressure shown

on the pump performance curve.

Pump Vacuum Check

Withthepumpinoperative, installavacuumgauge

in the system, using pipe dope on the threads.

Block the suction line and start thepump. Atoper-

ating speed the pump should pull a vacuum of 20

inches (508,0 mm) or more of mercury. If it does

not, check for air leaks in the seal, gasket, or dis-

charge valve.

Openthe suctionline,andreadthevacuumgauge

with the pump primed and at operation s peed.

Shut offthe pump. The vacuumgauge readingwill

immediately drop proportionate to static suction

lift,andshouldthenstabilize.Ifthevacuumreading

falls off rapidly after stabilization, an air leak exists.

Before checking for the source of the leak, check

the point of installation of the vacuum gauge.

STOPPING

Never halt the flow of liquid suddenly. If the liquid

being pumped is stopped abruptly, damaging

shock waves can be transmitted to the pump and

piping system. Close all connecting valves slowly.

On engine driven pumps, reduce the throttle

speedslowlyandallowtheenginetoidlebrieflybe-

fore stopping.

If theapplication involves a highdischarge

head, gradually close the discharge

throttling valve before stopping the pump.

After stopping the pump, disconnect or lock out

the power source to ensure that the pump will re -

main inoperative.

Cold Weather Preservation

In below freezing conditions, drain the pump to

preventdamagefromfreezing. Also,cleanoutany

solids by flushing with a hose. Operate the pump

for approximatelyone minute; this will removeany

remaining liquid that could freeze the pump rotat-

ing parts. I f the pump will be idle for more than a

few hours, or if it has been pumping liquids con-

taining a large amount of solids, drain the pump,

and flush it thoroughly with cleanwater. Toprevent

large solids from clogging the drain port and pre-

venting the pump from completely draining, insert

a rod or stiff wire in the drain port, and agitate the

liquid during the draining process. Clean out any

remaining solids by flushing with a hose.

BEARING TEMPERATURE CHECK

Bearingsnormally run at higher than ambient tem-

peratures because of heat generated by friction.

Temperatures up to 160_F(71_ C) are considered

normalforbearings,andtheycanoperatesafelyto

at least 180_F(82_ C).

Checkingbearingtemperaturesbyhandisinaccu-

rate. Bearing temperatures can be measured ac-

curately by placing a contact-type thermometer

against the housing. Record this temperature for

future reference.

A sudden increase in bearing temperature is a

warning that the bearings are at the point offailing

to operate properly. Make certain that the bearing

lubricant is of the proper viscosity and at the cor-

rect level (see LUBRICATION in MAINTENANCE

AND REPAIR). Bearing overheating can also be

caused byshaft misalignmentand/orexcessivevi-

bration.

When pumps are first started, the bearings may

seem to run at temperatures above normal. Con-

tinued operation should bring the temperatures

down to normal levels.

TSERIES OM--01930--03

TROUBLESHOOTING PAGE D -- 1

TROUBLESHOOTING --- SECTION D

Review all SAFETY information in Section A.

Before attempting to open

or service the pump:

1. Familiarize yourself with this manual.

2. Disconnect or lock out the power source to

ensure that the pump will remain inoperative.

3. Allow the pump to cool if overheated.

4. Check the temperature before opening any

covers, plates, or plugs.

5. Close the suction and discharge valves.

6. Vent the pump slowly and cautiously.

7. Drain the pump.

TROUBLE POSSIBLE CAUSE PROBABLE REMEDY

PUMP FAILS TO

PRIME

Suction check valve contaminated or

damaged.

Clean or replace check valve.

Air leak in suction line.

Lining of suction hose collapsed.

Correct leak.

Replace suction hose.

Leaking or worn seal or pump gasket. Check pump vacuum. Replace

leakingorwornsealorgasket.

Suction lift or discharge head too high. Check piping installation and in-

stall bypass line if needed. See

INSTALLATION.

Strainer clogged. Check strainer and clean if neces-

sary.

Not enough liquid in casing. Add liquid to casing. See PRIM-

ING.

PUMP STOPS OR

FAILS TO DELIVER

RATED FLOW OR

PRESSURE

Air leak in suction line.

Lining of suction hose collapsed.

Correct leak.

Replace suction hose.

Leaking or worn seal or pump gasket. Check pump vacuum. Replace

leakingorwornsealorgasket.

Strainer clogged. Check strainer and clean if neces-

sary.

Suction intake not submerged at

proper level or sump too small.

Check installationand correctsub -

mergence as needed.

OM--01930--03

TSERIES

TROUBLESHOOTINGPAGE D -- 2

TROUBLE POSSIBLE CAUSE PROBABLE REMEDY

PUMP STOPS OR

FAILS TO DELIVER

RATED FLOW OR

PRESSURE (cont.)

PUMP REQUIRES

TOO M UCH

POWER

PUMP

CLOGS FRE-

QUENTLY

Impellerorotherwearingpartsworn

or damaged.

Replace worn or damaged parts.

Check that impeller is properly

centered and rotates freely.

Impeller clogged. Free impeller of debris.

Pump speed too slow. Check driver output; check belts

or couplings for slippage.

Discharge head too high. Install bypass line.

Suction lift too high. Measureliftw/vacuumgauge.Re-

duce lift and/or friction losses in

suction line.

Pump speed too high. Check driver output; check that

sheaves or couplings are cor-

rectly sized.

Discharge head too low. Adjust discharge valve.

Liquid solution too thick. Dilute if possible.

Bearing(s) frozen. Disassemble pump and check

bearing(s).

Liquid solution too thick. Dilute if possible.

Discharge flow too slow. Open discharge valve fully to in-

crease flow rate, and run power

source at maximum governed

speed.

Suction check valve or foot valve

clogged or binding.

Clean valve.

EXCESSIVE NOISE Cavitation in pump.

Impeller clogged or damaged.

Pump or drive not securelymounted.

Pumping entrained air.

Reduce suction lift and/or friction

losses in suction line. Record vac-

uumand pressure gaugereadings

and consult local representative or

factory.

Locate and eliminate source ofair

bubble.

Secure mounting hardw are.

Clean out debris; replace dam-

aged parts.

TSERIES OM--01930--03

TROUBLESHOOTING PAGE D -- 3

TROUBLE POSSIBLE CAUSE PROBABLE REMEDY

BEARINGS

RUN TOO HOT

Bearing temperature is high, but

within limits.

Check bearing temperature regu-

larly to monitor any increase.

Low or incorrect lubricant. Check for proper type and level of

lubricant.

Suction a nd discharge lines not

properly supported.

Check piping installation for

proper support.

Drive misaligned. Align drive properly.

PREVENTIVE MAINTENANCE

Sincepumpapplicationsareseldomidentical,and

pump wear is directly affected by such things as

the abrasive qualities, pressure and temperature

oftheliquidbeingpumped,t hissectionisintended

only to provide general recommendations and

practices for preventive maintenance. Regardless

of the application however, following a routine pre-

ventive maintenance schedule will help assure

trouble-free performance and long life from your

Gorman-Rupp pump. For specific questions con-

cerning your application, contact your Gorman-

Rupp distributor or the Gorman-Rupp Company.

Record keeping is an essential component of a

good preventive maintenance program. Changes

in suction and discharge gauge readings (if so

equipped) between regularly s cheduled inspec-

tions can indicate problems that can be corrected

before system damage or catastrophic failure oc-

curs.Theappearanceofwearingpartsshouldalso

bedocumentedateachinspectionforcomparison

as well. Also, if records indicate that a certain part

(such as the seal) fails at approximately the same

duty cycle, the part can be checked a nd replaced

beforefailureoccurs,reducingunscheduleddown

time.

F or new applications, a first inspection of wearing

partsat250hourswillgiveinsightintothewearrate

foryourparticularapplication.Subsequentinspec-

tions should be performed at the intervals shown

on the chart below. Critical applications should be

inspected more frequently.

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