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Reassembly
KohlerEngines.com 20 690 01 Rev. F
Install PTO Side Oil Seal
PTO Seal Depth Details
A
B
A Oil Seal B
Seal Depth
5.5 mm (0.216 in.)
Use a seal driver and install to a depth of 5.5 mm (0.216
in.) into crankcase.
Install Governor Cross Shaft
1. Place thin thrust washer onto governor cross shaft
as far as it will go.
2. Lightly lubricate shaft with oil, and install it from
inside crankcase.
3. Slide thick thrust washer onto shaft from outside as
far as it will go. Secure by inserting hitch pin in
machined groove.
Install Oil Pump Assembly and Intake Cam Shaft
Assembled Intake Cam Shaft Details
A
B
C
F
E
D
A Intake Cam Shaft B 3 mm Diameter Pin
C Oil Pump Assembly D Hole Location 2
E Hole Location 1 F
2.5 mm Diameter
Pin
1. If oil pump assembly was removed from intake cam
shaft, reassemble it onto shaft. Press fi t of drive pins
in holes may be one of two designs. One style of
tube has drive pin holes machined to be a clearance
(slip) fi t on one side and a press fi t on other
accepting smooth style drive pins. Later design
tubes have holes uniformly machined and use
knurled style drive pins. Support cam shaft
(clearance holes up, when applicable), and install
shorter 2.5 mm (0.098 in.) diameter pin in outer hole,
closest to bottom end. Center pin in shaft.
2. If it was removed, install and center longer, 3 mm
(0.118 in.) diameter drive pin into upper hole.
3. Lightly grease gerotor gears and install into oil
pump, with short drive pin fi tted into slot of inner
gear.
Pump Outlet Seals
AB
A Open Seal B Closed Seal
Oil Pump Outlet Styles
AB
A
Open Outlet Style
(Requires Seal)
B Closed Outlet Style
4. Determine if outlet of oil pump is open or closed.
Open style pumps require use of a rubber seal
between pump outlet and lower main bearing area.
Some models use an open style seal with an internal
passage to feed oil to lower bearing. Some models
use a closed seal without an oil passage, and
crankshaft is crossed-drilled for lower bearing
lubrication. Both styles of outlet seals are shown. If a
new seal is to be ordered, be sure it is same style as
what was removed. Lightly lubricate ends of oil
pump outlet seal with oil and install in into outlet of
oil pump.