Service and Repairs

59
Gear Reduction System
17 690 01 Rev. L KohlerEngines.com
4. Remove cover and gasket. Ensure two dowel pins
remain in place.
B
B Chain Cover
5. Remove screw and outer fl at washer securing
splined pinion gear to crankshaft.
H
H Flat Washer
6. Carefully remove splined pinion gear, chain, and
PTO sprocket shaft with spring washer from unit as
an assembly.
I
G
E
F
E Spring Washer F
PTO Sprocket
Shaft
G Chain I Splined Pinion Gear
7. If necessary, remove rear pinion spacer from
crankshaft. Note position of spring washer on outer
side of PTO sprocket shaft.
E
J
E Spring Washer J Pinion Spacer
Inspection
Remove gaskets and clean all gasket surfaces. Do not
nick or damage surfaces. Clean and inspect condition of
all gears and chain for wear, chips, or damage. Replace
as necessary. Rotate bearings and chain and check for
any roughness. Inspect bearing surfaces for any damage
or irregularities. Replace as necessary.
Reassembly
NOTE: Use new gaskets and outer seal when
assembling. Lightly lubricate lip of seal with oil.
NOTE: Lubricate chain and gears with clean oil before
assembling.
1. Ensure spring washer is in correct position on outer
side of PTO sprocket shaft.
2. If removed, install rear pinion spacer to crankshaft.
3. Ensure chain is around PTO sprocket shaft and
splined pinion gear. Slide PTO sprocket shaft, chain,
and splined pinion gear into reduction unit as an
assembly.
4. Install outer fl at washer to splined pinion gear and
secure to PTO shaft with screw. Torque screw to
24.4 N·m (216 in. lb.).
5. Using a new chain cover gasket, install chain cover
to reduction unit. Secure with screws. Torque
screws, in sequence shown, to 7.4 N·m (66 in. lb.).
6. Install key into keyway of PTO sprocket shaft.
7. Refi ll engine oil as outlined in Change Oil (see
Lubrication System).