Kohler K9J Service Manual page 116

The Fillet Must
Blend Smoothly
With The Bearing
Journal Surface
High Point From
Fillet Intersections
This Fillet Area
........,.__.,_......->-'
Must Be
Completely Smooth
Figure 11-16. Crankpin Fillets.
When replacing a crankshaft with external threads
on the flywheel end with one that has internal
SHAFT END - GEAR HUB DIMENSION
K91 -- .740-.750"
K141 -- 1.105-1.115"
K161 -- 1.105-1.115"
K181 -- 1.105-1.115"
K241 -- 1.074-1.084"
K301 -- 1.074-1.084"
threads, different mounting hardware is required.
The internally threaded crankshafts are sold in kits
which include the hardware. The mounting hard-
ware can also be purchased separately.
NOTE:
1. Use a 13/32 1.0. x 1-1/4 0.0. x 1/8 TH. plain
washer (Part No. 52114 01) when installing
drive cups with a 1-114" Dia. spotface (ma-
chined, recessed area around mounting hole}.
These drive cups are primarily used on Inter-
national Harvester applications, but may be
found on other applications. Therefore, use the
drive cup to identify which washer should be
used.
2. Required for drive cups with 5/8" mounting
hole.
Figure 11-17. Gear Reduction Unit- Exploded View.
OPTIONAL GEAR REDUCTION UNIT
The reduction unit consists of a driven gear which
is pressed on the power take off (PTO} shaft. The
drive gear is an integral part of the engine crank-
shaft. The gear reduction on the K91 and K181
units is 6:1. The gear reduction on the K301 en-
gine is 4:1. The PTO shaft is supported by two
bearings, one in the cover and the other in the
housing. Oil seals are provided at both ends of the
shaft. Refer to Figure 11-17.
Removal
1 . Drain lubricating oil from unit.
2. Remove four cap screws from gear housing
and slide cover off along drive gear.
3. Remove four cap screws holding gear housing
to engine.
4. Wash all parts and inspect shaft, bushing and
gear for wear. Replace worn parts.
5. Remove old oil seals and install new seals (flat
side out) in the gear housing and cover.
11.13
II