4-32
GTH-1256 AF
Part No. 57.4400.9219
September 2017
Section 4 • Repair Procedures
6-2
Auxiliary Gear Pump
How to Adjust the Auxiliary
Line Max Pressure Relief Valve
1 Engage the parking brake.
2 Connect a 0 to 5000 psi / 0 to 350 bar pressure
gauge to port TP2.
3 Go under the cabin.
4 Fully loosen the adjustment screw.
5 Close the tap to the side of the valve.
6 Start the engine and let it run at maximum rpm.
7 Tighten the adjustment screw until the pressure
gauge connected to port TP2 reads a value of
2610 psi / 180 bar.
8 Open the tap to the side of the valve.
How to Remove the Auxiliary
Gear Pump
WARNING
Bodily injury hazard. This
procedure requires speci
fi
c
repair skills, lifting equipment
and a suitable workshop.
Attempting this procedure
without these skills and tools
could result in death or serious
injury and signi
fi
cant component
damage. Dealer service is
strongly recommended.
Note: When removing a hose assembly or
fi
tting,
the
fi
tting and/or hose end must be torqued to
speci
fi
cation during installation. Refer to Section 2,
Hydraulic Hose and Fitting Torque Specifi cations
.
Note: Perform this procedure with the engine off
and cool to the touch.
1 Close the hydraulic tank ball valves.
2 Tag, disconnect and plug the hydraulic hoses.
Cap the
fi
ttings.
WARNING
Bodily injury hazard. Spraying
hydraulic oil can penetrate and
burn skin. Loosen hydraulic
connections very slowly to allow
the oil pressure to dissipate
gradually. Do not allow oil to
squirt or spray.
3 Cap the auxiliary gear pump holes and the
hoses ones.
4 Remove the auxiliary gear pump.
HYDRAULIC PUMPS
