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Reassembly
KohlerEngines.com 20 690 01 Rev. F
Cam/Closure Plate Components
G
F
H
L
G
O
N
K
J
I
M
P
B
C
D
E
A
A Oil Seal B Closure Plate
C Oil Passage Cover D Gasket
E Cam Gears F Thrust Washer
G Cam Levers H Cam Shaft (Exhaust)
I Closure Plate Gasket J Gerotor Gears
K Oil Pump L Cam Shaft Pin
M Cam Shaft (Intake) N Regulating Pin
O Governor Gear P Governor Gear Shaft
Install Cam Levers
Install two cam levers as shown. Dimple for seating push
rod must face up. Secure each cam lever using an M6
screw. Torque screws to 7.5 N·m (65 in. lb.). Lubricate
dimple and bottom side of cam lever with light grease or
oil.
Install Exhaust Cam Shaft and Cam Gear
Drive Pin Locations for Exhaust Cam Shaft
B
C
D
F
E
A
A Exhaust Cam Shaft B 3 mm Diameter Pin
C 2.5 mm Diameter Pin D 1.86 mm
E Hole Location 1 F Hole Location 2
1. If drive pins were removed from exhaust cam shaft,
follow same procedure used earlier for intake cam
shaft and reinstall them.
2. Apply a dab of grease to formed groove in thrust
washer. Slide washer onto cam shaft so short drive
pin is seated in groove. Grease will hold washer in
position. Pivot exhaust cam lever toward push rod
bore, then insert cam shaft into counterbore of
crankcase. Make sure pin stays in groove of thrust
washer.
3. Lubricate cam surfaces of cam gears with light
grease or oil.
4. Assemble and install ACR (automatic compression
release) into exhaust cam gear if removed for
servicing.
a. Install spring onto ACR weight with loop around
post, and formed upper leg hooked behind upper
section.
b. Install ACR assembly into hole of exhaust cam
gear and hook long leg behind notched tab.
5. Lift exhaust cam lever and install exhaust cam gear
with assembled ACR onto cam shaft, engaging slot
with upper drive pin. Rotate gear and shaft so EX
timing mark on cam gear is in 8 o’clock position.
Install thrust washer onto cam shaft.
Install Intake Cam on Cam Shaft
NOTE: Cam gear assemblies may contain either two or
four rivets.
Lift intake cam lever and install intake cam gear onto
intake cam shaft, engaging slot with upper drive pin.
Rotate gear and shaft so IN timing mark on cam gear
is in 4 o’clock position. Early models only: install thrust
washer (if used originally), onto cam shaft.
Install Crank Gear
Orient crankshaft so key is in 12 o’clock position. Hold
crank gear with timing marks visible and slide it onto
crankshaft and key, so timing marks on crank gear align
with timing marks on cam gears.