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Operator's manual
+ INSTRUCTIONS FOR PRODUCT DELIVERY . . . Page 3
Nr. 99 950.GB.806.0
Ihre / Your / Votre • Masch.Nr. • Fgst.Ident.Nr.
GB
SERVO III Onland
Turnover Plough
ALLG./BA SEITE 2 / 9300-GB
Important information concerning
Product Liability.
According to the laws governing product liability, the manufacturer and
dealer are obliged to hand the operating manual to the customer at the time
of sale, and to instruct them in the recommended operating, safety, and
maintenance regulations. Confirmation is necessary to prove that the
machine and operating manual have been handed over accordingly.
For this purpose,
-document A is to be signed and sent to Pöttinger,
-document B remains with the dealer supplying the machine,
- and the customer receives document C.
In accordance with the laws of product liability, every farmer is an
entrepreneur.
According to the laws of product liability, property damage is damage
caused by a machine and not to it. An excess of Euro 500 is provided for
such a liabilioty.
In accordance with the laws of product liability, entrepreneurial property
damages are excluded from the liability.
Attention! Should the customer resell the machine at a later date, the
operating manual must be given to the new owner who must then be
instructed in the recommended regulations referred to herein.
GB Dear Farmer
You have just made an excellent choice.
Naturally we are very happy and wish to
congratulate you for having chosen Pöttinger.
As your agricultural partner, we offer you quality
and efficiency combined with reliable servicing.
In order to assess the spare-parts demand for
our agricultural machines and to take these
demands into consideration when developing
new machines, we would ask you to provide us
with some details.
Furthermore, we will also be able to inform you
of new developments.
Dokument D
GB-0100 Dokum D Servo
- 3 -
ALOIS PÖTTINGER Maschinenfabrik GmbH
A-4710 Grieskirchen
Tel. (07248) 600 -0
Telefax (07248) 600-511
GEBR. PÖTTINGER GMBH
D-86899 Landsberg/Lech, Spöttinger-Straße 24
Telefon (0 81 91) 92 99-111 / 112
Telefax (0 81 91) 92 99-188
GEBR. PÖTTINGER GMBH
Servicezentrum
D-86899 Landsberg/Lech, Spöttinger-Straße 24
Telefon (0 81 91) 92 99-130 / 231
Telefax (0 81 91) 59 656
❑Check SERVO Turnover Plough as per the delivery docket. Check that delivery is complete. All safety equipment
and operating devices at hand.
❑Using the operating manual explain and go over the operation, initial start and maintenance of the machine or
implement with the customer.
❑Fitting to the tractor has been carried out.
❑Check that hydraulic connections to the tractor have been made and that they are correct.
❑Hydraulic functions (turnover, cutting width adjustment) have been demonstrated and explained.
❑Plough is set correctly to the tractor (cutting width of 1st component, drawing point).
❑Transport and working positions have been explained.
❑Information about optional and additional equipment has been given.
❑It has been pointed out that to read the operating manual is imperative.
Cross where applicable. X
In accordance with Product Liability obligations, we would ask you to please check the following points.
GB
INSTRUCTIONS FOR
PRODUCT DELIVERY
In order to prove that the machine and the operating manual have been properly delivered, a confirmation is necessary.
For this purpose please do the following:
- sign the document A and send it to the company Pöttinger
(in case of Landsberg equipment: to the company Landsberg)
-document B stays with the specialist factory delivering the machine.
document C stays with the customer.
GB
Contents
- 4 -
950.GB.806.0 INHALT
Contents
Preparations on the tractor ......................................................................... 5
Hydraulic control on the lifting gear ............................................................. 5
Hydraulic connection ................................................................................... 6
Preparations on the plough ......................................................................... 6
Attaching to the tractor ................................................................................ 7
Road transportation .................................................................................... 7
Removal from tractor .................................................................................. 7
Garaging, cleaning and winter storage of the implement ............................ 7
ON-LAND Ploughing ................................................................................... 8
What does "ON-LAND-Ploughing" mean? .................................................. 8
Advantages of an "ON-LAND-Plough" ........................................................ 8
Converting to conventional ploughing ......................................................... 8
Converting to "ON-LAND" ploughing .......................................................... 8
Conventional ploughing .............................................................................. 8
Ploughing with wheels in the furrows .......................................................... 8
Setting the plough to the tractor using "Servomatic" ................................... 9
1.Set furrow width ....................................................................................... 9
2. Furrow width setting of the first ploughing component (backfurrow) ....... 9
3.Setting the drawing point (Z) .................................................................... 9
Turning the plough over ............................................................................ 10
Turning procedure ..................................................................................... 10
Setting the plough gradient (11) ................................................................ 10
Ploughing with hydraulic control ................................................................ 11
Pinning the upper link ................................................................................ 11
Shear bolts ................................................................................................ 12
General maintenance advice .................................................................... 13
Cleaning the machine parts ...................................................................... 13
Parking in the open ................................................................................... 13
Winter storage ........................................................................................... 13
Hydraulic unit ........................................................................................... 13
Setting the ploughing component tilt ......................................................... 14
Basic setting of the ploughing component ................................................ 14
Setting the disk coulter (* .......................................................................... 15
Spring loaded disk coulter (* ..................................................................... 15
Pre-ploughing implements: ....................................................................... 15
Double feeler wheel .................................................................................. 16
Transport-Feeler wheel ............................................................................. 17
Changing to working position .................................................................... 17
Changing to transport position .................................................................. 17
Extension arm with hydraulic releasing device for packer and trailing
implements ................................................................................................ 18
Working with a trailing implement ............................................................. 18
Fully automatic „Nonstop“ overload safety ................................................ 19
Setting range ............................................................................................. 19
Gas accumulator (43): .............................................................................. 20
Altering pressure in the gas accumulator .................................................. 20
Take note .................................................................................................. 20
Technical Data .......................................................................................... 21
Defined use of the plough according to the manufacturer’s instructions .. 21
Vehicle Identification Plate ........................................................................ 21
Optional Equipment .................................................................................. 22
Plough body forms .................................................................................... 23
Supplement ............................................................................................... 24
Recommendations for work safety ............................................................ 26
Meaning of warning signs ......................................................................... 29
Important! Additional Information .............................................................. 30
Combination of tractor and mounted implement ....................................... 30
(950) ANBAU 9600-GB
GB
ATTACHING TO THE TRACTOR
- 5 -
20%
Kg
Preparations on the tractor
General
Please observe the power range limits of the tractor being used.
Wheels
- Air pressure in the tractor’s rear tyres when ploughing should be 0.8 bar.
- Under difficult operating conditions additional wheel weights can be
advantageous. See the tractor manufacturer’s operating manual also.
Ballast weight
Sufficient ballast weights are to be stacked on the front of
the tractor in order to guarantee steering and braking
capabilities.
At least 20% of the tractor’s tare weight on the front axle.
Lifting gear
- Left and right lifting struts (4) must be of equal length.
Adjust using adjusting device (3).
- If the lifting struts on the lower link can be pinned variously, then select the
back position (H). In so doing the tractor’s hydraulic unit will not be heavily
loaded.
- Position (2) the upper link (1) according to the tractor manufacturer’s
information.
Setting-up for transportation
- Fix the lower link with the struts (5) so that the attached implement cannot
swing out during transportation.
- The hydraulic’s operating lever must be secured against lowering.
- Do not transport in the „ON-LAND“ position
Setting-up for ploughing
- Set the struts (5) so that the greatest possible sideways swing range exists.
Hydraulic control on the lifting gear
Control position:
For mounting and dismounting the implement and for transportation.
The control position is the normal setting for the lifting gear hydraulics.
The mounted implement remains at the height (= position) set by the servo-
valve (ST).
Pull control, mix control:
Ploughing occurs with of one of the two operating modes. See chapter
„OPERATION“ for description.
ST
(950) ANBAU 9600-GB
GB
ATTACHING TO THE TRACTOR
- 6 -
TD65/92/30
Kat. III = 965 mm
Kat. II = 825 mm
Kat. II
ø 28 mm
Kat. III
ø 36,6 mm
6
TD65/92/28
Hydraulic connection
Double-action control unit
- Connect pressure line (1) and oil return line (2).
Preparations on the plough
Lifting lugs
Select the lifting lugs for the implement to be attached which correspond
to the hook-up size (category II or III) of the tractor’s lifting gear.
Changing lifting lug
- Knock clamping sleeve (2) out.
- Remove lifting lug
- Position required lifting lugs (o 28mm or 36.6mm) outwardly.
- Set required measurement and resecure lifting lug with clamping
sleeve (2) in the respective boring.
Cat. II = 825mm
Cat. III = 965 mm
Upper link pins
- Insert safety cord (6) in the unused boring.
1
2TD65/92/29
(950) ANBAU 9600-GB
GB
ATTACHING TO THE TRACTOR
- 7 -
TD65/92/27
1P1
P2
Parking stand
- Using the control lever (8), release
parking stand, swing up and back
and lay in the clamp (9).
Road transportation
• Only to be carried out in the "CONVENTIONAL" position, not in the
"ON-LAND" position.
- "ON-LAND" and "CONVENTIONAL" see chapter "Operation"
Lighting and Warning equipment
When travelling in fog, half-light or at night, protruding parts are to be
clearly indicated. Advice on the application of warning signs, reflective
film or paint and lighting units can be found in the instructions for
ancillary equipment in
supplement C.
PôTTINGER can supply
lighting units and warning
signs upon request.
Always observe the
statutory regulations.
Removal from tractor
- Turn plough to working position and stand the implement on firm,
even ground.
- Move the control lever (ST) back
and forth several times to reduce
pressure in the hydraulic lines.
- Switch tractor’s hydraulics to
control position.
- Disconnect hydraulic hoses
from tractor.
- Using the control lever (8),
release parking stand, swing down and secure.
- Detach upper and lower links from implement.
Garaging, cleaning and winter storage of the
implement
• Observe the points in the chapter „MAINTENANCE AND SERVICE“!
8
9
TD65/92/31
Attaching to the tractor
- Switch tractor’s hydraulics to control position.
- Attach implement to lower link and secure with linch pin.
Note
The attaching frame can be positioned horizontally by turning the tilt
spindle (11).
Doing this enables an easier coupling to the lower link.
Then turn the tilt spindle (11) back. See chapter „OPERATION“ also.
Pin upper link (1)
- Pin upper link (1) so that the attachment point (P1) on the plough
during operation is somewhat higher than the attachment point (P2)
on the tractor.
Securing lower link
If the tractor’s hydraulic control is
to be steered over the lower link,
then the upper link should be
positioned in the slot (LL) on the
attaching frame.
Securing upper link
If the tractor’s hydraulic control is
to be triggered over the upper link,
then both the (RL) borings on the attaching frame are to be used.
- Couple hydraulic hoses to the tractor.
ST
(950) 9600-GB EINSATZ
GB
OPERATION
- 8 -
TD 19/96/2
TD 19/96/1
ON-LAND Ploughing
What does "ON-LAND-Ploughing" mean?
• No tractor wheels in the furrows
- All wheels travel on unploughed ground.
Advantages of an "ON-LAND-Plough"
•Ground care with "ON-LAND" ploughing.
No tractor wheels in furrows to compress and knead the ground.
Less tractor wheel slippage as with conventional ploughing in wet
conditions.
•Greater swing range
This makes even travelling on unploughed ground with dual
wheels possible.
•Boundary ploughing possibility
To swing the plough away from ground already ploughed (antiON-
LAND position). This enables accurate ploughing right up to a
boundary.
•Conventional Ploughing
The plough can be centred behind the tractor = conventional
ploughing with wheels in the furrows.
Conventional ploughing
Ploughing with wheels in the furrows
Swing plough to behind centre of tractor using hyraulics.
Converting to conventional ploughing
Safety points
• Conversion to be carried on firm level ground only
• Do not enter the area underneath a raised plough
• When converting stay off the raised plough
1. Raise plough slightly
- use tractor's lifting gear
2. Pin spindle in (KP) position
- secure bolt with linch pin
3. Re-set drawing point (ZP)
- see next page
Converting to "ON-LAND" ploughing
Safety points
• Conversion to be carried on firm level ground only
• Do not enter the area underneath a raised plough
• When converting stay off the raised plough
1. Raise plough slightly
- use tractor's lifting gear
2. Pin spindle in (OP) position
- secure bolt with linch pin
3. Re-set drawing point (ZP)
- see next page
KP = conventional ploughing
OP = "ON-LAND" ploughing
TD 83/96/1
KP OP
(950) 9600-GB EINSATZ
GB
OPERATION
- 9 -
TD 83/96/2
VF
ZP
1
3
4
2
SK
Setting the plough to the tractor using
"SERVOMATIC"
„SERVOMATIC“ enables the optimum adaption of plough to tractor.
The following setting controls should be carried out in order.
Safety advice:
• Never reach into the area where danger of crushing exists
as long as parts are still moving.
• Do not stand in the swinging range of the implement.
1. Set furrow width
The standard model plough (SERVO) offers a choice of 4 furrow
widths. The furrow width is set by swinging the anchoring console.
- Loosen front hexagonal screw (SK) .
- Remove rear hexagonal screw.
- Swivel anchoring console until desired furrow width is obtained and
hexagonal screw fits in one of the holes (1, 2, 3, 4).
- Retighten hexagonal screws.
2. Furrow width setting of the first ploughing component
(backfurrow)
The furrow width (S2) of the first ploughing component is set by turning
the spindle (VF).
Furrow width (S1) to narrow
- turn spindle (VF) longer
Furrow width (S2) to wide
- turn spindle (VF) shorter
Furrow width (S2) correct
- Spindle is correctly set according to table.
See chapter
"PRESETTING THE PLOUGH“
Incorrect setting
The drawing line does not run through the mid-point of the tractor’s rear
axle. Tractor is drawn into already ploughed area during ploughing. This
can only be compensated by steering in the opposite direction.
Remedy
- Draw cylinder (ZP) out until drawing line (ZL) runs through the
midpoint (M).
3. Setting the drawing point (Z)
Correct setting
The drawing line (ZL) runs through the mid-point (M) of the
tractor’s rear axle. No side pull arises from the tractor.
The plough is easy to pull.
- Cylinder (ZP) is set according to the table.
(950) 9600-GB EINSATZ
GB
OPERATION
- 10 -
Turning the plough over
Beware!
• Nobody is to stand within the swinging range during turning.
• Turning procedure is only to be actuated from the tractor cabin.
• The plough must be completely raised to turn.
Turning procedure
The turning procedure is carried out by a double-action control unit.
- Switch control unit (ST) to lift (h).
The plough is turned 180¯.
- Switch control unit (ST) to neutral (O).
After some 5 seconds another turning procedure can be effected.
Setting the plough gradient (11)
The plough should sit as vertical (90°) as possible to the ground
during ploughing. This position is obtained by turning both spindles
(11) as described below.
- Lift plough 5 - 10 cm
- Actuate control unit (ST) briefly.
The plough turns slightly away from the stop spindle (11).
- Set the gradient using the spindle (11).
- Turn plough back to stop again.
- Proceed with ploughing and check whether the plough sits more
vertically (90°) to the ground through the new setting.
TD 65/92/25
90°
TD 65/92/48
s
h
0
ST
(950) 9600-GB EINSATZ
GB
OPERATION
- 11 -
Ploughing with hydraulic control
So that the hydraulic control functions properly, the
following must be observed.
- Position upper link (1) so that the attachment point
(P1) on the plough during operation is somewhat
higher than the attachment point (P2) on the tractor.
TD65/92/27
1
P1
P2
Pinning the upper link
LL,RL = Pinning position for securing lower link
RL = Pinning position for securing upper link
See chapter „ATTACHING TO THE TRACTOR“ also.
Setting the upper link
- During operation the plough should lie lengthwise as parallel as possible to the ground
surface.
- The working depth is set with the lifting gear via the servo-valve firstly.
Depending upon the hydraulic control model, varying ground resistance when ploughing is
passed on to the control servo-valve via the upper link (1) or both the lower links. The relevant
impulse is then converted causing the lifting gear to lift or lower.
An example: Securing upper link
The plough penetrates deeper into the ground.
This causes the pressure on the control servo-valve via the upper link to become greater.
As a consequence, the control valve remains switched to lift until the set working depth is
reached again.
Note:
Follow the tractor manufacturer’s operating manual also.
ST
(943) 9200 GB SICHERUNG
GB
OVERLOAD SAFETY
- 12 -
Shear bolts
The ploughing components are fastened with shear bolts.
When overloaded the shear bolts break (30) and the ploughing component swings away and up.
- Remove the rest of the shear bolt.
- Loosen hexagonal bolt (31).
- Swing ploughing component back into the working position.
- Insert new shear screws and retighten both bolts.
Take note!
Only use genuine shear bolts (see spare parts list) with the corresponding dimension and quality. Under no
circumstances use bolts with greater or lesser strength.
(950) 9600-GB WARTUNG
GB
MAINTENANCE AND SRVICE
- 13 -
General maintenance advice
In order to keep the implement in good condition even after a long
service life, please observe the following points:
Safety hints:
• Turn engine off when adjustment, service and repair work is to
be done.
• Do not work under the machine without safe support.
- Retighten all screws after the first hours of operation.
During operating time
- Check all screws occasionally and retighten if necessary.
- Grease the four greasing points on both of the swing bolts weekly.
- Grease all other greasing points at least twice per season.
At the same time oil joints and adjusting spindles also.
Expendable parts
- Replace worn out expendable parts in time to prevent all stress-
bearing parts from becoming damaged.
Tyre pressure
- Pay attention to the correct tyre pressure!
Check tyre pressure regularly!
• Danger of bursting exist when inflating or when tyre
pressure is too great!
Cleaning the machine parts
Take note!
Do not use a high
pressure cleaner to
clean bearings or
hydraulic parts.
- Danger of rust formation!
- Lubricate the machine after
cleaning and carry out a
short trial run.
- Cleaning with too much pressure can damage the paintwork.
Parking in the open
When parking in the open for
longer periods, clean plunger rods
and then grease.
Winter storage
- Thoroughly clean the machine
before storing.
- Store the machine where it is
weather protected.
- Protect exposed parts against rusting.
- Grease all greasing points
Hydraulic unit
- Check hydraulic hoses regularly for damage.
Immediately replace porous or damaged hydraulic hoses.
Beware: Danger of infection! Where there are dfects in the hydraulic
unit, do not touch areas of leakage.
Before working on the hydraulic unit
- lower implement to the ground.
- When carrying out maintenance work on a raised implement always
make it secure with a suitable support.
- Depressurize the hydraulic unit and turn the motor off.
FETT
TD49/93/2
TD55/93/22
FETT
(950) 9600-GB WARTUNG
GB
MAINTENANCE AND SRVICE
- 14 -
Basic setting of the ploughing component
Checks must be made in the following order after replacing worn out parts:
1. Stand the plough on even ground.
2. The gap (A) between plough and blade cutting edege must be the same for all ploughing components.
3. Check the gap (B1) on the last ploughing component.
B1 =0 - 5 mm for ploughing components* of the type W, UWS
5 - 8 mm for ploughing components* of the type UW, UWS, WSS
4. Set the same measurement for gap (B) as for B1.
* The type of ploughing component is shown clearly on the manufacturer’s plate.
Setting the ploughing component tilt
If the plough is not penetrating the ground correctly, an improvement
can be obtained by turning the eccentric bush.
• The blade point in the area „S“ is set either higher or lower depending
upon the position of the eccentric bush (A or B).
• Retighten screws after resetting.
On some models a catch plate is fitted instead of an eccentric
bush.
See
"Basic setting of the ploughing component"
also.
(943) 9500 GB ZUSÄTZE
GB
ADDITIONAL DEVICES
- 15 -
(* Beware! Danger of injury on the cutting edges.
Setting the disk coulter
(*
• Set the cutting depth of the disk coulter at a gap of 5 cm to the
ploughing blade tip.
• The lengthwise fitting position is preselected by moving the carrier on
the console.
Further fitting positions arise by swivelling the eccentric (50) 180°.
• The lateral gap to the
ploughing blade tip
should be 2 - 3 cm. It
is set by swiveling the
eccentric (50).
Spring loaded disk coulter
(*
- This disk coulter can be fitted to all SERVO NOVA ploughs with a
frame height from 72 cm.
Pre-ploughing implements:
Maize skimmer, Manure skimmer
These implements are designed to incorporate surface trash
straw or manure in the soil.
• Set the working depth to 1/3 of the total working depth.
• The lengthwise fitting position should lie over or behind the
ploughing blade tip. Where there is a lot of surface growth, or
when ploughing in straw, the pre-ploughing implements should
be set back as far as possible.
Leg deflector (60)
Leg deflector, which are fitted to the ploughing
component, serve to bend the stalks less
when ploughing in straw enabling them to slide
off better.
Trashboards (61)
For ploughing in manure or other fertilizers.
• Trashboards for ploughing components of the
type UW, W, WSS.
These implements can be used instead of
manure mulchers (see above) but are not very
effective with shallow working depths.
Knife coulter (62)
(*
This implement can be used instead of a disk
coulter (see above) however it is not adjustable.
(950) 9600-GB DOPPELTASTRAD
GB
FEELER WHEELS
- 16 -
Double feeler wheel
• The double feeler wheel is fitted to the last ploughing component.
• The working depth is set via the spindle (70)
using the accompanying ratchet.
• When ploughing with a 4 blade plough the
double feeler wheel can be fitted to the
second last ploughing component. This has
the advantage that when ploughing along
the boundary the feeler wheel does not
greatly project over the last ploughing
component.
Double feeler wheel fitted to the second last ploughing
component.
(983) 0000-GB TRANS-PENDELRAD
GB
FEELER WHEEL
- 17 -
TD65/92/75
1
Transport-Feeler wheel
Tyres
SERVO 45, SERVO 55
10.0/75-12 10 PR
Max. 5,5 bar pressure.
SERVO 35
23x10,50-12 6 PR
Max. 2 bar pressure.
As feeler wheel
• Fix the depth
1. Spindle (1) adjusment
2. Spindle (1) adjusment
As transport wheel
• Doing this relieves the tractor’s rear axle and lifting gear.
Very important remark:
The upper link (1) shold not be connected to the
plough during transportation.
• Always unhinge the upper link during road
transport.
A1 = working position
T1 = transport position
TD 55/93/3
Changing to working position
- Attach upper link and lift the plough with the tractor’s lifting gear.
- Release locks (for safety reasons do this from the tractor seat with the rope (S)
With that swivel the control lever 90° (position A1).
- The turning unit positions the plough vertically.
- Remove bolts (3), swivel the support wheel console about 90° into working
position and pin with the bolts (3) again (A).
Secure bolts with linch pin (5).
- Cutting width adjustment :
- for the servo plus : hydraulically
- for the standard plough : put the axle T3 in the position you want.
- Cylinder in working position (A2)
Changing to transport position
- Adjust the plough in the smallest cutting width
- for the servo plus : hydraulically
- for the standard plough : put the axle T3 in the position you want.
- Cylinder in transport position (T2)
pin with the bolts
- Remove bolts (3), swivel the support wheel console about 90° into the transport
position and pin with the bolts (3) again (T).
Secure bolts with linch pin (5).
- Release locks.
With that swivel the control lever (on the attaching frame) 90° (position T1).
- Lift the plough with the tractor’s lifting gear.
- The turning unit slowly positions the plough horizontally until locking bolts on the
attaching frame automatically engage.
- Remove upper link (1).
A, A2 = working position
T, T2 = transport position
T1
SA1
018-08-8
Transport position
SERVO Standard
(943) 9200 GB AUSLEGER
GB
PLOUGH-TRAILING IMPLEMENTS
- 18 -
Optional equipment
Extension arm with hydraulic releasing device for packer and trailing implements
• A double-action control unit is necessary on the tractor.
• The extension arm is fitted to the main frame.
• A T screw fitting with a plug-in coupling sleeve is fitted to the return line (T) on the plough turning cylinder.
83
AB
40 - 50 cm
TD65/92/86
TD65/92/85
82
81v
81e
TD65/92/83
TD65/92/84
30cm
Working position
• Pin strut (83) in the front boring (A).
• The distance (40 - 50 cm) to the
tractor wheel is also set with the
strut (83).
Transport position
• Pin strut (83) in the rear boring (B).
With this the extension arm is
swivelled in to the plough frame.
Working with a trailing implement
For attachment a latching device is fitted to the trailing implement
which lies at right angles to the direction of travel.
Engaging the trailing implement
• Bolts in the locking position (81v).
Switch the servo-valve briefly to „lift“ to lock the bolts.
• With the extension in the outer range (30 cm) hook on to the trailing
implement’s latching device.
Releasing the trailing implement
• Unlock the bolts hydraulically (81e).
Switch the servo-valve briefly to „lower“ to unlock the bolts.
(948) 9200 GB NOVA
GB
SERVO NOVA
- 19 -
A
E
90 - 150 bar
TD65/92/57
42
80 bar
41
Fully automatic „Nonstop“ overload safety
The fully automatic overload safety is recommended for soils which are
difficult to plough e.g. soil with stones or other foreign bodies.
Every ploughing component is hydromechanically safeguarded against
damage on the SERVO-NOVA plough.
When driving over an obstacle the ploughing body swings out to either side
and then swings automatically back into the working position. There is no
need to stop the tractor.
Along with the fully automatic „Nonstop“ overload safety, all component
carriers have a shear bolt as additional protection. See chapter
"OVERLOAD SAFETY“
for a description.
Setting range
• The overload safety release force can be adapted to the various soil types.
Normal setting
- Pressure in the hydraulic cylinders (40) must be approx. 10 bar greater than the nitrogen pressure in the gas accumulator (43).
--------------------------------------------------------------------------------------------------------------------------------------------
Nitrogen pressure in the gas accumulator (43) Pressure adjustment area
(Factory set) of the hydraulic cylinder (40)
--------------------------------------------------------------------------------------------------------------------------------------------
80 bar 90 bis 150 bar
--------------------------------------------------------------------------------------------------------------------------------------------
Should practice show that the overload safety reacts too often,
the pressure in the hydraulic cylinders can be increased with
the accompanying top-up device (42).
Increasing the pressure in the hydraulic cylinders:
- Shut-off valve in position A.
- Remove sealing cap (41) from shut-off valve and screw on
top-up line.
- Depressurize servo-valve on the tractor.
- Connect plug-in coupling (42) to the tractor.
- Open shut-off valve (position E). The hydraulic pressure
drops.
- Actuate servo-valve on tractor until the manometer shows the
desired pressure. Then
close the shut-off valve
(position A).
Take note!
The shut-off valve must
always be closed
(position A) when
ploughing.
- Depressurize top-up line using servo-
valve.
- Remove top-up line and screw sealing cap (41) back on.
(948) 9200 GB NOVA
GB
SERVO NOVA
- 20 -
Gas accumulator (43):
Pressure in the gas accumulator can also be altered.
A reduction or increase of gas pressure in the accumulator depends upon the
various soil types.
• With very light soil the gas pressure can be somewhat reduced.
Important!
No welding, soldering or mechanical work of any kind may be carried out
on the accumulator.
Altering pressure in the gas accumulator
This work must be carried out only by our Customer Service or by a specialist work
shop.
A special filling and testing device is required to reduce or increase the preload
pressure in the gas accumulator.
1. Reduce pressure:
a) Remove plastic cap.
Remove the lead mould plug (if it exists) in the gas filling plug (44) with a pointed tool.
b) Slightly loosen the gas filling plug (44).
c) Screw on filling and testing device.
d) Slightly open the outlet valve on the filling device.
Slowly let the nitrogen out (N) until the mamometer shows the desired pressure has
been reached.
e) Close outlet valve, remove filling device, tighten gas filling plug and knock the lead
mould plug (if it exists) back in.
2. Increase pressure:
Only use nitrogen (N) to fill the accumulator, do not use oxygen (danger of explosion).
f) Connect filling device to nitrogen bottle.
g) Remove plastic cap.
Remove the lead mould plug (if it exists) in the gas filling plug (44) with a pointed tool.
Slightly loosen the gas filling plug (44).
Screw on filling and testing device.
h) Screw testing device onto nitrogen bottle.
i) Slightly open the outlet valve on the filling device and fill with nitrogen until the mamometer shows the required pressure has been
reached.
k) Close outlet valve, remove filling device, tighten gas filling plug and knock the lead mould plug (if it exists) back in.
Take note
All gas accumulators show a slight pressure drop after a certain period of time, according to "HYDAC" factory specifications.
The gas loss amounts to approx. 2-3 % pa.
It is recommended that the accumulator pressure be checked and, if necessary, regulated after 4-5 years.
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