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Fan Components
I
J
A
Oil Sentry
™
E
Fan Belt
I
Bearing Carrier
Remove Oil Sentry™
NOTE: Unless Oil Sentry
malfunctioning, disassembly from breather cover
is unnecessary.
Disconnect wire lead from Oil Sentry
remove switch from breather cover.
Remove Lower Drive Pulley and Fan Belt
1. Remove four screws attaching lower drive pulley
assembly to pulley adapter and fl ywheel.
2. Remove pulley halves with spacer shims from
adapter, and take fan belt off upper pulley/fan
assembly. Note number of shims between pulley
halves, and on front side of pulley, especially if same
belt will be reinstalled.
Remove Fan Assembly, Mounting Bracket, and Fan
Shaft
NOTE: Further disassembly of fan/hub and pulley
assembly is not necessary unless a problem
exists. If disassembly is performed, note
assembly order and position of parts.
1. Remove front nut and washer securing fan assembly
to fan shaft. Remove fan and pulley assembly from
upper mounting bracket.
66 690 14 Rev. A
E
F
G
G
H
K
Fan Mounting
B
Bracket
F
Fan Pulley
J
Pulley Half
switch is damaged or
™
switch, and
™
KohlerEngines.com
Disassembly/Inspection and Service
D
B
C
L
J
C
Fan Shaft
G
Ball Bearing
K
Spacer Shims
2. Remove screws and take off mounting bracket with
fan shaft attached.
3. Fan shaft may be removed from mounting bracket,
by removing rear nut, if individual servicing of either
part is required.
Inspection and Service
Cooling fan assembly consists of a fan attached to a
v-pulley and bearing carrier (hub), rotating on a dual
ball-bearing fan shaft (arbor). Assembly is mounted with
a bracket to intake manifold and driven via a split pulley
off fl ywheel.
Inspect components carefully for signs of wear or
damage.
1. Inspect fan to make sure blades are in good
condition and free of any cracks, nicks, or damage.
Area around fan mounting holes must also be free of
any cracks or damage.
2. Fan and hub assembly, when mounted to center
arbor shaft, must rotate smoothly without noticeable
bearing play, wobble, or binding.
3. Check v-belt for excessive wear, cracking or
damage. If proper belt tension cannot be obtained,
or condition of belt is suspect; replace it with Kohler
Part No. 66 203 02-S. Do not use a substitute belt.
A
D
Fan
H
Retainer Ring
L
Pulley Adapter
71
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