September 2017
Part No. 57.4400.9219
GTH-1256 AF
4-37
Section 4 • Repair Procedures
How to Install the Hydrostatic
Transmission 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 Open the engine compartment.
2 Remove the front cover of the engine housing.
3 Remove the cover that is under engine.
4 Attach a lifting strap and lift the transmission
pump using a overhead crane.
5 Install the hydrostatic transmission pump on
the engine.
6 Remove
the
fi
tting caps from the hydrostatic
transmission pump.
7 Remove the hoses caps.
8 Connect the hoses to the pump.
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.
9 Connect the harness to the transmission pump.
10 Install the auxiliary gear pump on the
hydrostatic transmission pump.
11 Install the retaining fasteners securing the
battery disconnect switch mounting plate.
12 Start the engine and prime the pump. See 6-3,
How to Prime the Hydrostatic Transmission
Pump
.
13 Inspect for leaks.
14 Adjust the pump pressure. See 6-3,
How to test
the Hydrostatic Transmission Pump
.
HYDRAULIC PUMPS
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