Disassembly & Assembly Of Hydrostatic Pump - Kohler K91 Owner's Manual

FIG.
46.
Hydrostatic Pump Exploded View
1.
Pump Shaft Seal
2.
Shaft Retaining Ring
3.
Bearing
4.
Bearing Retaining Ring
5.
Pump Housing
6.
Swash Plate
7.
Thrust Plate
8.
Cylinder Block
&
Piston Assembly
9.
Valve Plate
10.
Charge Pump Assembly
DISASSEMBLY & ASSEMBLY OF
,HYDROSTATIC PUMP
11.
Gerotor Set
12.
Pump End Cap Housing
13.
Retaining Ring
14.
Retaining Washer
15.
Trunnion Shaft Seal
16.
Trunnion Shaft
17.
Roll Pin
18.
Trunnion Shaft Needle Bearing
19.
Control Shaft
20.
Pump Shaft
1.
Remove the four
3/8-16
socket-head cap screws
that hold the finned aluminum pump housing to the
pump end' cap.
2.
With the pump assembly
held
horizontally,
carefully remove the finned aluminum pump housing,
together with the input shaft, swashplate and cylinder
block assembly Note: Make sure the cylinder block
and piston' assembly does not drop off the input shaft.
The
valve: plate may stick to the cylinder block and
come out with it, or it may stick on the charge pump
housing.
3.
Remove the pump housing/pump end cap
gasket.
4. Carefully slide off the cylinder block and piston
assembly from the pump shaft. Important:
If
any of
the pistons slip out, return them to their original cylin-
der bores. Place the cylinder block and pistons on a
lint free towel so the valving surface and slippers
will not be damaged.
If
the pump housing
i s
to be
disassembled to remove the shaft, trunnion or swash