Assembly Of Pump Section - Kohler K91 Owner's Manual

10.
With snap ring pliers, remove the internal re-
taining ring that retains the .pump shaft ball bearing in
the pump housing, then remove the bearing by press-
ing it toward the inside of the housing.
Assembly
of
Pump Housing
1. Install pump shaft ball bearing in the front-of
the pump housing and retain with the internal tru-arc
retaining ring.
2.
Note: Only
if
needle bearings have been re-
moved, install the two trunnion shaft needle bearings
from the outside, pushing on the lettered end of the
bearing.
The
bearings should be pressed in flush with
the bottom of the seal bore
so
they will not interfere
with the seal installation.
5.
Install the trunnion seal washers and the retain-
ing rings.
6.
Install the pump shaft by tapping it through
the bearing from the inside and retain
it
with the
external snap ring.
7.
Lubricate the pump shaft seal and install over
the pump shaft with the lip side toward the pump.
Press it in, place so that it is flush with the outside of
the housing.
Assembly of Pump Section
1.
Install a new
"0"
ring seal and new back-up
ring on th,e free wheeling valve, making sure the seal
is toward the pump housing and the split back-up
ring
is
toward the outside. Install the valve assembly.
FIG. 59.
Needle Bearing Installation
3.
Install new trunnion shaft seals, pressing them
in until they touch bottom. Oil the seal lips with
1OW30 engine oil.
4.
Insert the swash plate assembly into the case.
Slide
the trunnion shafts into each side, and into the
swash plate housing. Line up the roll pin holes and
install the roll pins. One roll pin
i s
used at the short
trunnion shaft and two roll pins are used at the con-
trol shaft. Drive the first pin in so it enters into the
far side of the swash plate. Then drive the second
roll pin down against the first pin until it
is
below
the surface of the swash plate. Drive the single roll
pin at the short trunnion side
so
that it i s
1/4"
below
the surface. See Fig.
57.
FIG.
60.
Pump End Cap Valves
2.
Install both pump check valve balls and springs,
together with their slotted plugs and
"0"
ring seals.
3.
Viewed from the motor side of the pump end
cap, install charge relief valve and implement valve
parts.
FIG. 61. Pump End Caps
a. Models not equipped for hydraulic
lift:
1. Install the hex head plug and new
"0"
ring seal in the top left corner of the pump
end cap.