Yanmar 4LHA-HTP Operation Manual page 610

Chapter 7 Reduction and Reversing Gear
5. Reassembly
IMPORTANT: The following step should be done very
carefully to obtain the actual bearing clearance. Pry up
gently and evenly to lift shaft. Shaft will only move a
small amount.
d. Pry up on washer to lift output shaft.
e. Make note of the reading. The bearing clearance mea-
sured PLUS the preload required is equal to the
amount of shim thickness to be ADDED.
Example:
Bearing Clearances Measured
+ Bearing Preload Required
= Shims to Be Added
f. Remove dial indicator. Remove bolt and flange washer.
38. When thickness of shims to be ADDED has been deter-
mined, the input half of housing must again be removed.
Remove bolts and lockwashers, then lift off input half of
housing.
a-Bolts
0.010 in.
0.004 in.
0.014 in.
7-2-36
4LHA Series