Kohler command pro CH940 Service Manual page 70

Reassembly
NOTE: Make sure engine is assembled using all
specified torque values, torque sequences, and
clearances. Failure to observe specifications
could cause severe engine wear or damage.
Always use new gaskets. Apply a small amount
of oil to threads of critical fasteners before
assembly, unless a sealant or Loctite
specified or preapplied.
Make sure all traces of any cleaner are removed before
engine is assembled and placed into operation. Even
small amounts of these cleaners can quickly break down
lubricating properties of engine oil.
Check closure plate, crankcase, cylinder heads, and
valve covers to be certain all old gasket material has
been removed. Use gasket remover, lacquer thinner, or
paint remover to remove any remaining traces. Clean
surfaces with isopropyl alcohol, acetone, lacquer thinner,
or electrical contact cleaner.
Install Flywheel End Oil Seal
1. Make sure seal bore of crankcase is clean and free
of any nicks or burrs.
2. Apply a light coat of clean engine oil to outside
diameter of oil seal.
3. Install oil seal into crankcase using a seal driver.
Make sure oil seal is installed straight and true in
bore and tool bottoms against crankcase.
Install Lifter Feed Chamber Gaskets and Cover
1. Install lifter feed chamber gasket, followed by lifter
feed cover over lifter feed chamber. If used, position
breather baffle on top of parts with winged offset
down.
2. Install 3 screws. Make sure all parts are properly
aligned. Torque screws to 7.7 N·m (68 in. lb.).
Install Crankshaft Bearing (flywheel)
If bearing was removed in servicing, install a new
bearing using an arbor press and driver.
1. Make sure crankcase bore for bearing is clean, dry
and free of nicks or burrs.
2. Press flywheel side main bearing in place with notch
oriented in 12 o'clock position using an arbor press
and driver. Make sure bearing is fully seated against
flange and oil feed hole is open in crankcase.
3. Apply a light coat of clean engine oil to inner surface
of bearing.
70
Install Governor Shafts, Seal, and Governor Gear
Governor Components and Details
is
®
A Crankcase Surface
C
E Crankcase Surface
If governor shafts, seal, and/or governor gear were
removed, reassemble as follows.
1. Lightly oil lip and outside diameter of new governor
cross shaft seal. Install seal into crankcase to depth
shown.
2. If governor gear shaft was removed, press or lightly
tap replacement shaft into closure plate to depth
shown.
3. Lubricate governor cross shaft bearing surfaces in
crankcase with engine oil. Insert governor cross
shaft end with flat cutout where governor yoke is
secured, into crankcase and position shaft so that
flat part is visible (up).
4. Attach governor yoke to cross shaft so curved
section is up as marked. Secure with 2 screws. If a
thread locking compound is not preapplied, apply a
small amount of Loctite
equivalent, to screw threads before installing. Torque
screws to 2.2 N·m (20 in. lb.).
5. Install first regulating pin with head down so it will
contact yoke. Install governor gear with second
regulating pin and flyweight assembly in/down onto
governor shaft until it locks into position. Apply a
small amount of grease to locking tab thrust washer
and install on top of governor gear so tang is facing
up in 6 o'clock position.
KohlerEngines.com
B
A
C
F
D
E
B
Oil Seal D
F
266™ Threadlocker or
®
Seal Depth
1.5-2.0 mm
(0.059-0.078 in.)
12.66 mm
(0.498 in.)
Governor Gear
Shaft
62 690 01 Rev. J