F-1031, Section 4307
Page 5 of 12
Reassembly
Before reassembly, make sure all reusable parts have been cleaned and are kept free of dirt during reassembly.
Guidelines for Installing Ball Bearings, Oil Seals and O-Rings
Installing Ball Bearings
Keep new ball bearings wrapped until they are to be installed. When pressing
the ball bearing on a shaft or into a bore, coat appropriate surfaces with
grease.
Shaft
- grease shaft and ball bearing bore.
Bore
- grease bore and outside of diameter of ball bearing.
Always apply force to the inner race of a ball bearing when pressing it on a
shaft and to the outer race if pressing into a bore. Press evenly with a piece of
pipe or tube which just clears the shaft or bore.
Installing Oil Seals
Before installing a new oil seal in its housing, apply a thin coat of sealant to
housing oil seal seat. Be sure that the seal, shaft and housing are clean.
Always install a seal with the seal lip facing in. Lubricate seal lip with light oil
before installing shaft. Apply force to the outer edge of the seal and press in
evenly.
Installing Gaskets
If a gasket is awkward to hold in place while assembling component, coat one
of the mating flanges with grease and press the gasket into position against
the flange. The grease will hold the gasket in place during reassembly.
Cap and Driven Shaft Assembly
1.
Grease oil pump side bearing bore on the chain case cap and install bear‐
ing (T25). Press bearing completely into the bore until approximately 3/8”
(depth of shoulder on oil pump support housing) of the bore is exposed.
2.
Install oil pump support housing without shims. This will seat the installed
bearing.
3.
Press bearing (T25) against shoulder on the driven shaft (T135). Slide
spacer (T95) on the driven shaft.
4.
Install key (T136) in the driven shaft keyway.
5.
Position the cap (with or without midsection) into a press with the oil pump
support housing (T31) resting on the press base. Ensure housing and cap
are properly supported. Position spacer (T29) and driven sprocket (T26)
inside of the cap and line up with bearing (T25) bore.
6.
Press previously assembled driven shaft assembly down into the cap,
lining up the key with the driven sprocket keyway. Press until driven shaft
assembly seats against bearing (T25) previously installed in the cap.
7.
Apply a bead of silicone in the oil seal seat area of the oil seal housing
(T23). Install oil seal (T19) into oil seal housing (T23). Install gasket (T24)
on oil seal housing and fasten to chain case cap. Care must be taken not
to roll the oil seal lip when sliding oil seal over driven shaft.
8.
Install lock washer (T32) and lock nut (T33) on driven shaft (T135). Make
sure the tang on the lock washer (T32) is in the driven shaft keyway.
Tighten lock nut (T33) one half turn past finger tight.
9.
The driven shaft assembly was factory shimmed to limit axial float. If any
of the parts have been changed, it may be necessary to change the total
thickness of shims between the cap and oil pump support housing. The
correct thickness of shims can be determined as follows:
Apply axial force to end of the driven shaft so it is moved forward against
housing (T23) as far as it can go. Install oil pump support housing (T31),
less shims (T30), until the nose end of the adapter (T31) contacts the
outer driven shaft bearing (T25). Measure clearance between the oil pump
support housing (T31) and the face of the cap (T65). Add to this measure‐
ment .005 to .010 in. This total is the thickness of shims (T30) to install
between the oil pump support housing (T31) and cap. Remove the hous‐
ing and apply a bead of silicone to shoulder of oil support housing (T31)
and install the shims and fasten the housing to the cap with cap screws
(T133) and lockwashers (T9).
NOTE: Shims are color coded for thickness as follows:
.005” = blue
.010 = brown
10. Place this assembly aside for later installation.
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