Yanmar 4LHA-HTP Operation Manual page 607

Chapter 7 Reduction and Reversing Gear
5. Reassembly
IMPORTANT: The following step should be done very
carefully to obtain the actual bearing clearance. Avoid
bumping the input shaft and turn very slowly on the spe-
cial tool knob. (Shaft will only be moving a very small
amoun.)
d. Slowly turn the special tool knob clockwise to push the
shaft upward. (Perform the above sequence several
times to ensure on accurate reading.)
e. Make note of 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
7-2-33
4LHA Serie
0.009 in.
0.004 in.
0.013 in.