Yanmar 4LHA-HTP Operation Manual page 608

Chapter 7 Reduction and Reversing Gear
5. Reassembly
INTERMEDIATE SHAFT PRELOAD
36. Measure bearing clearance as follows:
a. Remove hex plug from housing.
b. Screw special bolt with nut into intermediate shaft and
tighten snuggly. Turn nut up until it touches bolt head.
c. Mount dial indicator on bolt head. Turn output shaft sev-
eral times to ensure bearing is seated.
a - Special Bolt with Nut
^^^^^^^^^^^^^
d. Zero dial indicator.
IMPORTANT: The following step should be done very
carefully, to obtain the actual bearing clearance. Turn nut
very slowly as shaft will only be moving a small amount.
e. Hold bolt with one wrench and slowly turn down nut to
pull shaft upward. (Perform the above sequence sev-
eral times to ensure accurate reading.)
a - Bolt-Hold Stationary
b - Nut-Turn to Move Shaft
7-2-34
4LHA Series