CRANKSHAFT, MAIN BEARINGS, FLYWHEEL & CRANKCASE
Figure 8. - Mac Tool No MC-22 (Muffler Chisel)
Remove the Crankshaft Bearings as follows:
Drain the oil from the crankcase oil pan, then
remove the oil pan.
Remove the cap screws securing the crankshaft
Tap the caps lightly with a soft metal hammer or
mallet to loosen them, then remove lower bearings.
If the bearings are to be reused, identify
each bearing as to its original position.
Remove the Lower Bearing from the caps.
Wrap the pieces in a clean cloth and store
them until reassembly.
NOTE: If the crankshaft is to be removed, disregard
Remove the upper bearing halves as de-scribed
in methods a or b.
Insert a thin piece of flexible soft metal
between the crankshaft and crankcase.
This will push against the end of the
bearing furthest from the nib holding the
Simultaneously, turn the crankshaft in the
direction of rotation. This will cause the
bearing to slide easily from position.
An alternate method of removing upper
bearing halves is to hammer the closed end
of a small cotter pin to form a T.
Insert the prongs of the cotter pin into the oil
hole of the crankshaft journal with the
flattened head just protruding. Rotate the
crankshaft and the cotter pin head will push
the bearing from position.
Remove the Crankshaft as follows:
After flywheel is removed, remove the flywheel
housing (with crankshaft rear oil seal retainer
attached) from the crankcase.
NOTE: It is not necessary to remove the flywheel
housing if all that is required is to replace the
crankshaft rear oil seal.
Remove the oil lubricating pump as
described in Section 8.
assembly as described in Section 7.
PRINTED IN UNITED STATES OF AMERICA