Camshaft Gear; Idler Gear And Shaft; Oil Pan; Oil Pump - Wisconsin VH4D Repair Manual

In reassembly; inspect crankshaft oil seal and re-
place if necessary. Be sure that oil sling is in place
on crankshaft, then mount gear cover using a new
flange gasket. Tap the two dowel pins in place and
mount capscrews. Tighten
screws 14 to 18 ft. Ibs.
torque.
CAMSHAFT GEAR
If it is necessary that the camshaft gear be removed,
first pry oil sling off crankshaft, and remove thrust
plunger and spring from end of camshaft. Take out
the three capscrews and lockwashers, and remeve
gear from camshaft using a screw driver or similar
wedge tool.
The camshaft gear has offset mounting holes to pro-
vide accurate assembly for valve timing. The gear can
only be put on the correct way for matching up the tim-
ing mark with that of the crankshaft gear. See Fig. 24.
IDLER GEAR AND SHAFT
A tapped hole in the side of the crankcase contains
a setscrew for locking idler shaft in place. See Fig.
25. Remove screw with a 5/32" Allen wrench. Dis-
assemble shaft and gear from case by means of the
3/8"-16 tapped puller hole in end of idler shaft.
In reassembly; be sure oil groove in shaft is facing
up. Drive shaft into crankcase with soft metal ham-
mer and maintain a .003 to .004 inch clearance be-
tween idler gear and shoulder of shaft. Lock shaft in
place with the Allen set screw.
OIL PAN
The engine can now be inverted so that the supports
and oil pan can be removed, see Fig. 26.
In reassembly; tighten oil pan mounting screws, 6 to
9 foot pounds torque.
Fig. 23
OIL PUMP (Fig. 27)
Remove locknut and driver gear from shaft. If gear is
too tight to remove by hand, use a puller, hammering
on end of shaft to loosen gear will damage pump.
Take out slotted pipe plug from bottom of crankcase.
By means of a 5/32 inch Allen wrench, remove lock-
screw from pipe plug hole. Withdraw oil pump from in-
side crankcase. If pump fits too tight to remove by
hand, tap front of pump housing (not shaft), with ham-
mer and brass rod.
PISTONS and CONNECTING RODS (Figs. 28, 29, 32)
By means of a 1/2" socket wrench, loosen and remove
the hex locknuts from connecting rod bolts. Then, by
tapping the ends of the bolts lightly, the connecting
rod cap will break free from the bolts.
Scrape off all carbon deposits that might interfere with
removal of pistons from upper end of cylinder. Turn
CAMSHAFT GOVERNOR GEAR
GEAR
TIMING
MARKS
SHAFT
GEAR
IDLER
GEAR
OIL PUMP GEAR
F~g. 24
IDLER GEAR
GEAR PULLER
3/8"-i6
GEAR
BOLT
COVER
ALLEN SET SCREW
LOCATED IN CRANKCASE
Fig. 25
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