Remove Oil Pan Assembly
1. Remove screws securing oil pan to crankcase.
2. Locate splitting tabs cast into perimeter of oil pan.
Insert drive end of a 1/2" breaker bar between
splitting tab and crankcase and turn it to loosen seal.
Do not pry on sealing surfaces as this can cause
leaks.
Inspection
Inspect oil seal in oil pan and remove it if it is worn
or damaged. Refer to Install Oil Seal in Oil Pan in
Reassembly for new oil seal installation.
Inspect main bearing surface for wear or damage (refer
to Specifications). Replace oil pan assembly if required.
Governor Gear Assembly
Governor Shaft Component and Details
C
A
B
A
34.0 mm (1.3386 in.)
33.5 mm (1.3189 in.)
B
19.40 mm (0.7638 in.)
C
Gear Shaft
Governor gear assembly is located inside oil pan. If
service is required, refer to Inspection, Disassembly, and
Reassembly procedures.
Inspection
Inspect governor gear teeth. Replace gear if it is worn,
chipped, or if any teeth are missing. Inspect governor
weights. They should move freely in governor gear.
Disassembly
NOTE: Governor gear is held onto shaft by small
molded tabs in gear. When gear is removed from
shaft, these tabs are destroyed and gear must
be replaced. Therefore, remove gear only if
absolutely necessary.
Governor gear must be replaced once it is removed from
oil pan.
Breather/Oil Pan/Oil Reservoir/Piston Components
R
W
C
A
Q
P
K
I
L
X
O
T
C
J
G
D
E
F
U
B
Y
H
V
N
M
Z
S
A
Oil Fill/Dipstick
B
Dipstick Tube
C
Oil Seal
D
Breather Gasket
E
Breather Cover
F
Flat Washer
G
Breather Reed
H
Governor Cross Shaft
I
Oil Pan Gasket
J
Piston Ring Retainer
K
Piston Pin
L
Piston
M
Piston Ring Set
N
Connecting Rod
O
Connecting Rod End
Cap
P
Camshaft
Q
Governor Gear
R
Locking Tab Thrust
Washer
S
Oil Pan
T
Oil Screen
U
Ball
V
Spring
W
Oil Pump Cover
O-ring
X
Outer Gerotor Gear
Y
Oil Pump Assembly
Z
Crankshaft
Disassembly/Inspection and Service
48
24 690 37 Rev. B
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