66
Reassembly
KohlerEngines.com
32 690 01 Rev. D
Install Valve Tappets and Camshaft
NOTE: Exhaust valve tappets are located on output
shaft side of engine, while intake valve tappets
are located on fan side of engine. Cylinder
number is embossed on outside of each cylinder
on crankcase. Valve tappets should always be
installed in same position as before disassembly.
1. Apply camshaft lubricant to contact surface of valve
tappets. Note mark or tag identifying tappets and
install them in their appropriate crankcase locations.
A small amount of grease applied to stems will hold
valve tappets up until camshaft is installed.
2. Liberally apply camshaft lubricant to lobes of
camshaft. Lubricate camshaft bearing surfaces of
crankcase and camshaft with engine oil.
3. Position timing mark of crankshaft gear at 12 o’clock
position.
4. Turn governor cross shaft clockwise until lower end
(blade) is laying against bottom of cylinder. Make
sure cross shaft remains in this position while
installing camshaft.
5. Slide camshaft into bearing surface of crankcase,
positioning timing mark of camshaft gear at 6 o’clock
position. Make sure camshaft gear and crankshaft
gear mesh with both timing marks aligned.
Determining Camshaft End Play
1. If a camshaft shim was used, install shim removed
during disassembly onto camshaft.
2. Position camshaft endplay checking tool on
camshaft.
3. Apply pressure on endplay tool (pushing camshaft
toward crankshaft). Use a feeler gauge to measure
camshaft endplay between shim (if used) and
endplay tool. Camshaft endplay should be
0.076/0.127 mm (0.003/0.005 in.).
4. If camshaft endplay is not within specified range,
remove endplay tool and shim accordingly. Shims
are color-coded by thickness and listed below.
White: 0.69215/0.73025 mm (0.02725/0.02875 in.)
Blue: 0.74295/0.78105 mm (0.02925/0.03075 in.)
Red: 0.79375/0.83185 mm (0.03125/0.03275 in.)
Yellow: 0.84455/0.88265 mm (0.03325/0.03475 in.)
Green: 0.89535/0.99345 mm (0.03525/0.03675 in.)
Gray: 0.94615/0.98425 mm (0.03725/0.03875 in.)
Black: 0.99695/1.03505 mm (0.03925/0.04075 in.)
5. Reinstall endplay tool and recheck end play.
Oil Pump Assembly
Oil pump is mounted inside oil pan. If service
was required and oil pump was removed, refer to
Disassembly/Inspection and Service procedure.
Governor Assembly
Governor assembly is located inside oil pan. If service
was required and governor was removed, refer to
Disassembly/Inspection and Service procedure.
Install Oil Seal in Oil Pan
Oil Seal Component and Detail
A
B
A
6.5 mm (0.255 in.)
B
Oil Seal
1. Check to make sure there are no nicks or burrs in
crankshaft bore of oil pan.
2. Apply a light coat of engine oil to outside diameter of
oil seal.
3. Drive oil seal into oil pan using a seal driver. Make
sure oil seal is installed straight and true in bore, to
depth shown.
Install Oil Feed Tubes and Filter Adapter
Oil Filter Adapter Components
A
B
A
Oil Filter Adapter
B
O-Ring
1. Lubricate new O-rings with clean oil and install into
groove on ends of oil pump oil feed tube.
2. Install oil feed tube with O-rings. Push in until seated
into outlet of oil pump. Make sure inner O-ring is not
unseated or damaged when installing.
3. Slide oil feed tube through oil pan and into hole for
main bearing. A small amount of grease applied to
outside, forward end of tube will hold tube in position
until adapter is installed.
4. Apply a small amount of grease and install a new
O-ring into groove of adapter for oil filter.
5. Position adapter, aligning locating pin with
corresponding recess in oil pan. Install flat washer
(plastic adapters only) onto adapter nipple, then
insert through adapter, surrounding oil feed tube and
finger tighten. Tighten nipple and torque to 33.9 N·m
(300 in. lb.). Do not overtighten.
