Powerfist 9041559 Owner's manual

V1.1 9041559

Please read and understand all instructions before use. Retain this manual for

future reference.

9041559 9 Gallon Twin-Tank Wheelbarrow Portable Air Compressor V1.1

2 For technical questions call 1-800-665-8685

SPECIFICATIONS

Engine Type Predator Gas Engine

Decibel Rating 95 dB

Air Tank Size 9 gal.

Tank Type Twin-tank

Drain Type Manual

Drive Type Belt

Number of Stages 1

Number of Cylinders 1

Cylinder Material Cast Iron

Air Delivery @ 40 PSI 10.2 CFM

Air Delivery @ 90 PSI 9 CFM

Max. Pressure Rating 135 PSI

Outlet Connection Size and Type 3/8 in. NPTF

HAZARD DEFINITIONS

Please familiarize yourself with the hazard notices found in this manual. A

notice is an alert that there is a possibility of property damage, injury or

death if certain instructions are not followed.

DANGER! This notice indicates an immediate and specific hazard that

will result in severe personal injury or death if the proper

precautions are not taken.

WARNING! This notice indicates a specific hazard or unsafe practice that

could result in severe personal injury or death if the proper

precautions are not taken.

CAUTION! This notice indicates a potentially hazardous situation that may

result in minor or moderate injury if proper practices are not

taken.

NOTICE! This notice indicates that a specific hazard or unsafe practice

will result in equipment or property damage, but not personal

injury.

V1.1 9 Gallon Twin-Tank Wheelbarrow Portable Air Compressor 9041559

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INTRODUCTION

The 9 Gallon Twin-Tank Wheelbarrow Portable Air Compressor features a

twin cast-iron cylinder compressor with a 212 cc engine and oil-lubricated

pump, making this a durable and reliable compressor for the jobsite.

A separate engine manual is included. Please consult it when necessary.

SAFETY

WARNING! Read and understand all instructions before using this tool. The

operator must follow basic precautions to reduce the risk of personal injury

and/or damage to the equipment.

Keep this manual for safety warnings, precautions, operating or inspection

and maintenance instructions.

WORK AREA

1. Operate in a safe work environment. Keep your work area clean, well-

lit and free of distractions. Place lights so you are not working in a

shadow.

2. Keep anyone not wearing the appropriate safety equipment away from

the work area.

3. Store unused tools properly in a safe and dry location to prevent rust

or damage. Lock tools away and keep out of the reach of children.

4. Do not install or use in the presence of flammable gases, dust or

liquids.

PERSONAL SAFETY

WARNING! Wear personal protective equipment approved by the Canadian

Standards Association (CSA) or American National Standards Institute (ANSI).

PERSONAL PROTECTIVE EQUIPMENT

1. Always wear impact safety goggles that provide front and side protection

for the eyes. Eye protection equipment should comply with CSA Z94.3-07

or ANSI Z87.1 standards based on the type of work performed.

2. Wear gloves that provide protection based on the work materials or to

reduce the effects of tool vibration.

a. Do not wear gloves when operating a tool that can snag the

material and pull the hand into the tool.

3. Wear protective clothing designed for the work environment and tool.

9041559 9 Gallon Twin-Tank Wheelbarrow Portable Air Compressor V1.1

4 For technical questions call 1-800-665-8685

4. Non-skid footwear is recommended to maintain footing and balance in

the work environment.

5. Wear a NIOSH approved respirator when working on materials that

produce hazardous fumes, dust or particulate matter.

6. This air source may cause hearing damage. Wear hearing protection

gear with an appropriate Noise Reduction Rating to withstand the

decibel levels.

PERSONAL PRECAUTIONS

Control the tool, personal movement and the work environment to avoid

personal injury or damage to tool.

1. Do not operate any tool when tired or under the influence of drugs,

alcohol or medications.

2. Avoid wearing clothes or jewelry that can become entangled with the

moving parts of a tool. Keep long hair covered or bound.

3. Do not overreach when operating a tool. Proper footing and balance

enables better control in unexpected situations.

SPECIFIC SAFETY PRECAUTIONS

WARNING! DO NOT let comfort or familiarity with product (gained from

repeated use) replace strict adherence to the tool safety rules. If you use

this tool unsafely or incorrectly, you can suffer serious personal injury.

WARNING! Excessive compressor RPMs could cause a pulley or flywheel to

shatter, possibly causing bodily harm or death. Do not operate the

compressor above the recommended RPM as supplied by the factory.

WARNING! Do not use the compressor in an environment with toxic, volatile

or corrosive vapours, air temperatures exceeding 104°F, water, or extremely

dirty air. Operate the compressor in an area with adequate ventilation.

WARNING! Discharge piping can exceed 350°F when compressor is

operating. Do not use plastic pipe or lead tin soldered joints for a discharge

line. Do not modify the discharge line.

1. Use the correct tool for the job. This tool was designed for a specific

function. Do not modify or alter this tool or use it for an unintended

purpose.

2. Do not use the tool if any parts are damaged, broken or misplaced.

Repair or replace the parts.

3. Risk of Bursting

V1.1 9 Gallon Twin-Tank Wheelbarrow Portable Air Compressor 9041559

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a. Serious injury or death may occur from an air tank explosion if the

air tank is not properly maintained or if modifications, alterations or

repairs are attempted. Drain air tank daily or after each use. Never

drill into, weld, patch or modify the air tank. Replace the tank

immediately or replace the entire compressor, if a leak develops.

b. Serious injury or death may occur if modifications are made to the

pressure switch, safety relief valve or other components that

control the tank pressure. Never make adjustments to the

components that control tank pressure. Do not make alterations

to the factory operating pressure settings. Check operation of the

pressure relief valve on a regular basis and never operate without

a factory approved pressure relief valve.

c. Check the manufacturer’s maximum pressure rating for air tools

and accessories. Compressor outlet pressure must be regulated so

as to never exceed the maximum pressure rating of the tool.

4. Risk of Explosion or Fire

Serious injury may occur if a fire is caused by overheating due to

inadequate ventilation or restrictions to any of the compressor’s

ventilation openings. Never place objects against or on top of an air

compressor. Always operate air compressor at least 12 in. away from

any wall or obstruction. Always operate in a clean, dry and well-

ventilated area.

5. Risk of Burn

Serious burn injuries could occur from touching exposed metal parts such

as the compressor head or motor during operation and even after the

compressor is shut down for some time. Never touch any of the exposed

metal parts during operation and for an extended period of time after the

air compressor has shut down. Do not attempt maintenance on the unit

until it has been allowed to completely cool.

6. Risk from Moving Parts

a. Serious injury may occur if repairs are attempted with damaged,

missing or removed protective guards, shrouds or missing covers.

All repairs to the air compressor should be made only by

authorized or trained service personnel.

b. This unit starts automatically. Always shut off the compressor and

bleed all pressure from the system before servicing the

compressor and when the compressor is not in use.

9041559 9 Gallon Twin-Tank Wheelbarrow Portable Air Compressor V1.1

6 For technical questions call 1-800-665-8685

7. Risk of Damage to Air Compressor or Property

a. Failure to transport or operate the air compressor properly may

result in major repair expenses. Always run the compressor in a level,

secure position that keeps it from tipping or falling during use.

b. Do not operate without an air filter or in a corrosive environment.

c. Always transport in a level position and use protective mats to

keep truck beds clean, etc. Fasten the compressor down securely.

Pressure must be released from the tank before transporting.

d. In cold climates, drain the tank after each use to avoid ice buildup.

8. Air supplied to the inlet filter must be clean. The compressor belt guard

must not be located closer than 12 inches to a wall, or 24 inches to

another compressor. Additional safety can be achieved by locating the

pulley drive system, with the guard, next to the wall.

9. Never use this compressor to inflate low pressure objects (i.e. toys,

footballs, etc.).

10. Do not replace the safety valve with a plug.

11. Do not install a shutoff valve in the compressor discharge line without

first installing a safety valve of proper size and design between the

shutoff valve and the compressor.

12. Periodically check all safety valves for proper operation. Safety valves

aid in preventing system failures by relieving system pressure when

compressed air reaches a pre-determined pressure level.

a. Do not attempt to tamper with safety valve. Anything loosened

from this device could fly up and hit you. Failure to heed this

warning could result in death or serious personal injury.

13. Do not move the compressor while in use.

14. Check the manufacturer’s maximum pressure rating for air tools and

accessories. Compressor outlet pressure must be regulated to never

exceed the maximum pressure rating of the tool (see Specifications).

Exceeding the maximum PSI rating can create a bursting hazard,

causing injury and property damage.

15. Serious injury may occur from loose debris being propelled at high speeds

from the compressed air stream. Always wear OSHA approved safety

glasses to protect the eyes during operation of the air compressor.

16. Always turn off the air compressor and drain tank pressure completely

before attempting maintenance or attaching air tools. Release pressure

slowly from the system.

V1.1 9 Gallon Twin-Tank Wheelbarrow Portable Air Compressor 9041559

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17. Serious injury or death may occur from inhaling compressed air. The air

stream may contain carbon monoxide, toxic vapors or solid particles. Never

inhale compressed air directly from the pump or air tool.

AIR HOSE PRECAUTIONS

1. Inspect the tool's air hose for cracks, fraying or other faults before each

use. Discontinue use if the air hose is damaged or hissing is heard from

the air hose or couplers. Replace the defective air hose.

2. Do not allow people, mobile equipment or vehicles to pass over the

unprotected air hose. Position the air hose away from high traffic

areas, in a reinforced conduit or place planks on both sides of the air

hose to create a protective trench.

3. Prevent damage to the air hose by observing the following:

a. Never carry the tool by the air hose.

b. Keep the air hose behind the tool and out of the tool's work path.

c. Keep the air hose away from heat, oil, sharp edges or moving

parts.

d. Do not wrap the air hose around the tool as sharp edges may

pierce or crack the air hose. Gently coil the hose and either hang

on a hook or fasten with a device to keep hose together when

storing.

4. A damaged or disconnected air hose under pressure may whip around

and inflict personal injury or damage the work area. Secure the

compressor's air hose to a fixed or permanent structure with clamps or

cable ties.

5. Install an in-line shutoff valve or regulator to allow immediate control over

the air supply in an emergency, even if a hose is ruptured.

UNPACKING

WARNING! Do not operate the tool if any part is missing. Replace the

missing part before operating. Failure to do so could result in a malfunction

and personal injury.

Remove the parts and accessories from the packaging and inspect for damage.

Make sure that all items in the contents are included.

Contents: • Air Compressor • Rubber feet (4)

9041559 9 Gallon Twin-Tank Wheelbarrow Portable Air Compressor V1.1

8 For technical questions call 1-800-665-8685

IDENTIFICATION KEY

A Engine

B Air Intake Filter

C Oil Fill Plug

D Pilot Valve

E Safety Valve

F Hour Meter

G Air Tank

H Tank Pressure Gauge

I Regulator Pressure Gauge

J Air Outlet

K Drain Valve

L Drain Valve

M Pressure Regulator Knob

N Rear Handle

O Rubber Foot

P Safety Guard for V-Belt

Q Front Handle

R Wheel

ASSEMBLY & INSTALLATION

Letter references in parenthesis (A) refer to the included Identification Key.

Dashed numbers in parenthesis (Fig. 1-1) refer to a specific point in an

illustration or image.

ATTACH THE RUBBER FEET

1. Insert a screw through the rubber foot (O), through the strut, a washer

and secure with a nut.

2. Repeat for the other three rubber feet.

3. Ensure that feet are attached evenly. Uneven feet drawn tightly to a

concrete floor or truck bed will cause severe vibrations resulting in

cracked welds or fatigue failure.

OPERATION

DANGER! A gas engine will produce carbon monoxide. Always provide

adequate ventilation! Do not operate engine in an enclosed area.

Fig.

1

V1.1 9 Gallon Twin-Tank Wheelbarrow Portable Air Compressor 9041559

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BEFORE FIRST USE

1. Check that all screws are tight.

2. Check that the tension rods are tight (see Care & Maintenance –

Month). This must be done again after the first hour of use.

3. When starting an engine driven unit with air pressure in the tank, flip

the pilot valve’s (D) toggle to the horizontal position. This will unload

the compressor and allow the engine to start easier.

4. When the engine has run for a few minutes, flip the toggle back to its

original position.

5. New compressors should be run with approximately 80 PSI of air

pressure in the tank for 1 hour to break-in (use regulator to control

tank pressure). This will allow the compressor time to warm up and

seat the rings.

PRE-START CHECKLIST

CHECK SAFETY VALVE

DANGER! If air leaks after the ring has been released, or if the valve is stuck

and cannot be actuated by the ring, do not use the air compressor until the

safety valve has been replaced. Use of the air compressor in this condition

could result in the tank bursting causing serious personal injury or death.

See Specific Safety Precautions: Bursting.

1. Turn the air compressor on and allow the air tank (G) to fill to 30 PSI.

2. Turn the air compressor off.

3. Pull the ring on the safety valve (E) to release air for twenty seconds.

4. Release the ring. Air must immediately stop escaping when the ring is

released. Any continued loss of air after releasing the safety valve ring

indicates a problem with the safety valve. Discontinue use and seek

service before continued use of the air compressor.

BEFORE EACH USE

WARNING! Never assume a compressor is safe to work on just because it is

not operating. It could restart at any time.

1. Make sure that the compressor is turned off.

2. Check the lubricant level (see Lubrication).

3. Make sure all safety valves are correctly installed.

9041559 9 Gallon Twin-Tank Wheelbarrow Portable Air Compressor V1.1

10 For technical questions call 1-800-665-8685

4. Be sure all guards are in place and securely mounted. Guards must

provide protection from moving parts while still allowing full air flow

for cooling purposes.

5. Drain moisture from the air tanks (See Maintenance: Daily).

WARNING! Do not open a drain valve (K and L) on any air tank containing

more than 30 PSI of air pressure.

PILOT VALVE ADJUSTMENTS

WARNING! The pilot valve is set at the factory for maximum efficiency.

Adjustments to either component must be performed by a qualified

technician. Exceeding the factory recommended maximum pressure may

cause personal injury.

The adjustments must be made while the unit is operating. Extreme caution

must be taken while working on the unit. Make all differential and unload

pressure adjustments in very small increments (1/8 turn).

SETTING UNLOAD PRESSURE

1. Flip the toggle to the ‘RUN’ position (Fig. 2-1)

2. Loosen the locknut (Fig. 2-3) by turning it

counterclockwise. Hold in place with the wrench.

3. Turn the nut (Fig. 2-2) with a second wrench. Turn

clockwise to increase the unload pressure, turn

counterclockwise to decrease the unload pressure.

4. Tighten locknut by turning it clockwise with the

wrench.

SETTING DIFFERENTIAL PRESSURE

5. Loosen the lower locknut (Fig. 3-3) by turning

counterclockwise. Hold in place with the wrench.

6. Turn the nut (Fig. 3-2) clockwise to decrease the

differential pressure and counterclockwise to increase

the differential pressure.

7. Tighten the locknut by turning it clockwise with the

wrench.

8. Flip the toggle to the unload position (Fig. 3-1).

Fig. 2

Fig. 3

V1.1 9 Gallon Twin-Tank Wheelbarrow Portable Air Compressor 9041559

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START/STOP

1. Connect the air line to the quick coupler.

2. To adjust the amount of air pressure supplied:

a. Pull up on the regulator knob (M) to unlock it.

b. The regulator pressure gauge (I) displays the current line pressure.

Turn the knob clockwise to increase pressure and

counterclockwise to decrease pressure.

c. Push the knob down to lock it into position.

3. Ensure the drain valve on each tank (K and L) is closed by rotating

them to the left.

4. Open the petcock on the unloader valve for cold starts (turn clockwise

or in).

5. Flip the toggle on the pilot valve to the vertical position.

6. Start the gas engine (consult the gas engine manual).

7. Watch and listen for excessive vibration and unusual noises. If either

exist, stop the compressor and refer to Troubleshooting.

8. Allow the compressor to run for a few minutes.

9. Close the petcock (turn counterclockwise).

10. Flip the toggle on the pilot valve to the ‘RUN’ position. The compressor

should pump up the tank to 135 PSI, then unload. If pressure exceeds

135 PSI, see Troubleshooting.

11. To stop the compressor, shut the engine off.

USING THE COMPRESSOR

WARNING! Always ensure the regulator pressure gauge reads zero before

changing air tools or disconnecting the hose from the air outlet. Failure to

do so could result in possible serious personal injury. Run the tool to

depressurize the system.

Your tool may require more air consumption than this air compressor is

capable of providing. Check the tool manual to avoid damage to the tool or

risk of personal injury.

Always use the minimum amount of pressure necessary for your

application. Using a higher pressure than needed will drain air from the tank

more rapidly and cause the unit to cycle on more frequently.

9041559 9 Gallon Twin-Tank Wheelbarrow Portable Air Compressor V1.1

12 For technical questions call 1-800-665-8685

1. Attach the air hose to the air outlet (J).

2. Rotate pressure regulator knob (M) to the desired line pressure. Turning

the knob clockwise increases air pressure at the outlet; turning

counterclockwise reduces air pressure at the outlet.

a. If using an inflation accessory, control the amount of air flow with

the pressure regulator knob.

3. Always shut off the engine when the task is finished. Never leave the

compressor running while unattended.

4. Completely relieve the system of air pressure by pulling the ring on the

safety valve. Position yourself so that the expelled moisture and air is

not blown towards you. Continue to pull the ring until all air pressure

escapes. Depressurize the tanks completely.

5. Drain moisture from each air tank using the drain valve (K and L)

located on the underside. Only do this when the tanks pressure is 10

PSI or lower. Position the compressor so that the drain valve is lower

than the rest of the air tank. Drain until all moisture is removed. Leave

the valves open until the tanks have time to dry.

6. Disconnect the air hose from compressor and hang the open ends

down to allow any moisture to drain.

7. Store the compressor and hose in a cool, dry place.

CARE & MAINTENANCE

Consult the Gas Engine manual for engine maintenance instructions.

1. Maintain the tool with care. A tool in good condition is efficient, easier

to control and will have fewer problems.

2. Inspect the tool fittings, alignment, hoses and power supply cord

periodically. Have damaged or worn components repaired or replaced

by an authorized technician. Only use identical replacement parts

when servicing.

3. Follow instructions for lubricating and changing accessories.

4. Only use accessories intended for use with this tool.

5. Keep the tool clean, dry and free from oil/grease at all times.

6. Maintain the tool’s labels and name plates. These carry important

information. If unreadable or missing, contact Princess Auto Ltd. for

replacements.

a. Do not operate this tool if it does not contain a legible warning label.

V1.1 9 Gallon Twin-Tank Wheelbarrow Portable Air Compressor 9041559

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7. The compressor may only be operated in temperatures under 104°F and

over 32°F. In cold climates, the compressor should be installed in a

heated building.

8. Fill the compressor pump with oil (see Lubrication).

9. Fill the fuel tank with fuel.

10. Rust can form inside the crankcase and on internal components as a result

of condensation. A compressor must operate long enough during each run

cycle to reach full operating temperature in order to reduce the risk of

condensation.

11. Condensation can also form in the air tank of your compressor. When this

happens, a mixture of air and moisture will be expelled through the

service valve and into whatever is connected to the valve (e.g. air hoses,

metal air lines, pneumatic tools, spray guns). An in-line filter, may be

required to eliminate the moisture.

12. Drive pulleys and compressor flywheels must be properly aligned and

tensioned to specifications.

WARNING! Only qualified service personnel should repair the tool. An

improperly repaired tool may present a hazard to the user and/or others.

CLEANING

1. Always use a clean cloth. Never use brake fluids, gasoline, petroleum-

based products, or any strong solvents to clean the unit. Doing so

could risk deterioration of the enclosure plastic.

2. Clean the intake filter every 100 hours in service. The intake filter

prevents dust and dirt from being drawn in and a clogged intake filter

will decrease performance. To clean the intake filter:

a. Remove the two hex screw from the air intake filter (B) cover.

b. Remove the filter from the two halves of the plastic housing, tap it

to remove the dirt, blast it down with low-pressure compressed

air (approx. 43 PSI) from inside of the filter to remove fine

particles and re-insert it.

MAINTENANCE SCHEDULE

WARNING! Some surface temperatures exceed 350°F when the unit is

operating. Do not touch as it may cause a burn injury. Wait for the unit to

cool before starting to service.

9041559 9 Gallon Twin-Tank Wheelbarrow Portable Air Compressor V1.1

14 For technical questions call 1-800-665-8685

WARNING! Before servicing, always shut off the engine and remove the

spark plug wire. Release all air from the tank by pulling the ring on the

safety valve until all air pressure escapes. Failure to depressurize tank

before maintenance may cause serious personal injury.

WARNING! Never attempt to relieve air pressure in an air tank by removing

a pipe plug or any other system component.

HOUR METER

The hour meter records the engine and compressor’s running time to assure

required maintenance is performed on schedule.

Refer to the gas engine owner’s manual for maintenance procedures to be

performed on the engine. If the unit is used in an excessively dirty or dusty

environment, check and perform all maintenance procedures more often.

AFTER FIRST 100 HOURS OR FIRST MONTH OF OPERATION

Replace break-in lubricant with SAE 40W oil (see lubrication).

DAILY

1. Maintain the lubricant level at the halfway point on the sight glass.

Discolored lubricant or a higher lubricant level reading may indicate

the presence of condensed liquids (see Troubleshooting).

2. Humidity in the air causes condensate to form in the air tank. Drain

moisture from air tank(s). Tank(s) subjected to freezing temperatures may

contain ice. Store the compressor in a heated area before attempting to

drain moisture from the tank(s). To drain moisture from the air tanks:

a. Turn the air compressor off and allow air compressor to become

cool to the touch before servicing. Turn pressure regulator knob

fully counterclockwise.

b. Completely relieve the system of air pressure by pulling the ring on

the safety valve (E). Position yourself so that the moisture and air

being expelled does not touch you. Continue to pull the ring until all

air pressure escapes.

c. Drain moisture from the air tanks using the drain valve located on

the underside of each air tank. Tilt the compressor in the direction

of the drain valve into a suitable container until all moisture has

been removed. If unit will not be used for a while, leave drain valve

open to allow moisture to completely drain out and help prevent

corrosion on the inside of tank. Otherwise, close valve completely.

d. If drain valve is clogged, remove and clean valve and reinstall.

V1.1 9 Gallon Twin-Tank Wheelbarrow Portable Air Compressor 9041559

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3. Give compressor overall visual inspection and be sure safety guards

are in place.

4. Check for any unusual noise or vibration.

5. Check for leaks.

WEEK LY

1. Check all pressurized components for rust, cracking or leaking. Immediately

discontinue use of the equipment and relieve all system pressure if any of

these problems are discovered. Do not use the equipment until it has been

inspected and repaired by a qualified mechanic.

2. Clean the exterior surfaces of the compressor.

3. Check the air filter and replace if necessary.

MONTHLY

1. Check belt tension.

a. In order to adjust the drive belt, the

safety guard (P) must be removed.

b. Check the belt alignment by placing

a straightedge against the face of

the flywheel, touching its rim at two

places (Fig. 4).

c. Adjust the flywheel or motor pulley so that the belt runs parallel to

the straightedge. Use a puller to move the motor pulley on the

shaft. Properly adjusted, a 3 lb pressure applied to the belt between

the motor pulley and the compressor flywheel will deflect the belt

about 1/4 in. (6 mm).

d. To adjust the belt tension, loosen the four engine mounting screws.

Slide the engine in the proper direction, until the belt is tensioned to

the point where it can still be depressed by approx. 1/4 in. (6 mm) at

the longest free position. Re-tighten the engine

mounting screws and refit the safety guard for

the belt.

2. Check pulley retaining screws.

3. Check system for air leaks.

4. Check that all screws, bolts and nuts are tight.

5. Tighten the head tension rods between 22 to 27

torque (Fig. 5-1).

Fig. 4

Fig. 5

9041559 9 Gallon Twin-Tank Wheelbarrow Portable Air Compressor V1.1

16 For technical questions call 1-800-665-8685

EVERY 3 MONTHS OR EVERY 300 HRS. OF OPERATION

Change the pump’s lubricant

Y EA RLY

Inspect the tank for rust, pin holes, or other imperfections that could cause

it to become unsafe. Never weld or drill holes in the air tank.

LUBRICATION

Inspect and lubricate the tool when required. Only use light oil to lubricate

the tool. Other lubricants may not be suitable and could damage the tool or

cause a malfunction during use.

When not in use for an extended period, apply a thin coat of lubricant to the

steel parts to avoid rust. Remove the lubricant before using the tool again.

NOTICE! NEVER use a penetrating oil to lubricate the tool. Penetrating oil may

act as a solvent that can break down the grease and cause the tool to seize up.

NOTICE! Lubricant that appears milky may have mixed with condensate.

Replace the oil immediately to avoid equipment failure.

1. Replace pump’s break-in lubricant with SAE 40W oil.

2. Before starting this compressor, check the lubricant level. Place the

compressor on a level surface. The oil level should register at the

halfway point on the sight glass (Fig. 6-2).

Ambient Temperature SAE Viscosity

30-104°F SAE 40

Below 30°F SAE 30

3. Do not use petroleum-based automotive oils because specific types

have a tendency to foam and leave carbon deposits when used in

compressors.

4. Change the oil.

a. Shut off the engine and release the air

pressure.

b. Unscrew the oil fill plug (Fig. 6-1) from the

compressor pump. Place a clean rag in the

oil fill plug opening to prevent dirt from

getting into the engine while draining.

c. Use a funnel to collect the oil in a pan

under the oil drain plug (Fig. 6-3).

Fig. 6

V1.1 9 Gallon Twin-Tank Wheelbarrow Portable Air Compressor 9041559

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d. Remove the oil drain plug and tilt the compressor slightly as

needed to remove all oil.

5. When the oil has drained out, re-fit the oil drain plug. Fill new oil

through the oil filler opening until it comes up to the required level.

Then replace the oil fill plug.

DISPOSAL

Recycle a tool damaged beyond repair at the appropriate facility.

Contact your local municipality for a list of disposal facilities or by-laws for

electronic devices, batteries, oil or other toxic liquids.

IMPORTANT! DO NOT pollute the environment by allowing uncontrolled

discharge of waste oil.

TROUBLESHOOTING

Visit a Princess Auto Ltd. location for a solution if the tool does not function

properly or parts are missing. If unable to do so, have a qualified technician

service the tool.

Problem(s) Possible Cause(s) Suggested Solution(s)

Motor hums or

runs slowly when

first turned on,

but compressor

does not start.

Motor then stops

humming.

• Fuses blow

• Circuit breakers

trip

• Motor thermal

overload trips

1. Lubricant used is too

heavy.

2. Defective check valve or

unloader.

3. Freezing temperature.

4. Motor sized incorrectly.

5. Drive belt too tight.

6. Lack of proper

ventilation/room

temperature too high.

1. Use a lighter weight

lubricant (see Lubrication)

2. Replace check valve or

unloader.

3.

Warm the compressor or use

a lighter weight lubricant

(see Lubrication).

4. Replace with correctly sized

motor.

5. Re-adjust belt.

6. Move the compressor to a

well-ventilated area.

Compressor won’t

operate.

1. Defective engine.

2. Lack of lubricant in

compressor.

3. Belt too tight or too

loose.

1. Replace or repair engine.

2. Add lubricant (see

Lubrication)

3. Adjust belt.

9041559 9 Gallon Twin-Tank Wheelbarrow Portable Air Compressor V1.1

18 For technical questions call 1-800-665-8685

Problem(s) Possible Cause(s) Suggested Solution(s)

Noisy operation. 1. Lack of lubricant in

crankcase.

2. Loose pulley, flywheel,

belt, compressor or

motor fasteners, belt

guard, clamps or

accessories.

3. Carbon deposits on

piston or valves.

4. Worn main bearings,

broken piston, worn wrist

pins, wrist pin bearings,

or loose connecting rod

bolt.

1. Check for possible damage

to bearings. Add lubricant.

2. Tighten where necessary.

3. Remove the cylinder head

and inspect for foreign

matter on top of the piston.

Clean.

4. Have compressor repaired

by a qualified technician.

Excessive

vibration

1. Pulley & flywheel

misaligned or loose.

2. Bent crankshaft.

3. Belt loose.

1. Re-align or tighten pulley

and flywheel.

2. Have compressor repaired

by a qualified technician.

3. Tighten belt. (See

Maintenance - Monthly)

Excessive

lubricant

consumption

and/or excessive

lubricant in hose

1. Crankcase overfilled with

lubricant.

2. Lubricant leaks.

3. Worn piston rings.

4. Wrong lubricant

viscosity.

5. Compressor on sloped

surface.

6. Scored cylinder.

7. Plugged crankcase

breather.

1. Drain lubricant. Refill to

proper level with proper

lubricant (See Lubrication)

2. Tighten bolts on compressor

to proper torque or replace

gaskets.

3. Have compressor repaired

by a qualified technician.

4. Drain lubricant and refill

with proper lubricant (See

Lubrication)

5. Level compressor.

6. Have compressor repaired

by a qualified technician.

7. Clean or replace crankcase

breather.

V1.1 9 Gallon Twin-Tank Wheelbarrow Portable Air Compressor 9041559

Visit www.princessauto.com for more information 19

Problem(s) Possible Cause(s) Suggested Solution(s)

Air blowing from

inlet filter

Damaged inlet (reed) valve. Have compressor repaired by a

qualified technician.

Insufficient

pressure at tool or

accessory

1. Leaks or restrictions.

2. Restricted air intake

(filter plugged).

3. Slipping belt.

4. Hose or hose connectors

too small.

5. Compressor incorrectly

sized.

6. Regulator not turned up

to high enough pressure /

faulty regulator.

7. Compressor valves

leaking.

1. Check for leaks or

restrictions in hose or

piping. Repair.

2. Replace air filter.

3. Tighten belt. (See

Maintenance - Monthly)

4. Replace with larger hose or

connectors.

5. Either use a smaller tool or a

larger compressor.

6. Turn the regulator to the

proper setting / replace

faulty regulator.

7. Have compressor repaired

by a qualified technician.

Tank loses

pressure rapidly

when compressor

shuts off.

1. Loose connection or leak

(pipe, tank drain valve,

tubing, fitting or hose).

2. Faulty check valve.

1. Turn unit off, unplug it, &

tighten or replace fittings or

components.

2. Replace faulty check valve.

Moisture in

discharge air.

Condensation in tank, caused

by high level of atmospheric

humidity or compressor is not

run long enough.

Drain tank after every use.

Drain tank more frequently in

humid weather & use an inline

filter.

Pressure in tank

exceeds 135 PSI.

1. Defective pilot valve.

2. Incorrectly adjusted pilot

valve.

1. Replace defective pilot valve.

2. Readjust pilot valve (see Pilot

Valve Adjustment)

Crankcase

lubricant is milky.

Water in lubricant due to

humidity or condensation.

Change lubricant. Move

compressor to less humid

atmosphere.

Belt roll over. 1. Misaligned belts.

2. Loose belt.

1. Align belts (See Maintenance

- Monthly)

2. Tighten belts (See

Maintenance - Monthly)

9041559 9 Gallon Twin-Tank Wheelbarrow Portable Air Compressor V1.1

20 For technical questions call 1-800-665-8685

Problem(s) Possible Cause(s) Suggested Solution(s)

Compressor

overheats.

1. High ambient

temperature, poor

ventilation.

2. Dirty cylinder and head

cooling fins.

3. Unit is undersized for

application.

4. Insufficient lubrication.

5. Compressor runs

backward.

6. One or more head valves

failing to seat properly.

7. Damaged cylinder head

gasket.

8. Restriction in head or

check valve.

1. Increase ventilation with

cooler air.

2. Clean all outer surfaces of

the compressor.

3. Re-evaluate application

requirements; re-size

compressor unit if necessary.

4. Inspect for proper lubricant

and amount (See Lubrication).

5. Have compressor repaired by

a qualified technician.

6. Have compressor repaired by

a qualified technician.

7. Have compressor repaired by

a qualified technician.

8. Inspect, clean or replace.

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Powerfist 9041559 Owner's manual

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