Yanmar 4LHA-HTP Operation Manual page 594

Chapter 7 Reduction and Reversing Gear
4. Disassembly
31. Remove needle bearings.
32. Remove piston rings from shaft.
33. Remove tapered roller bearing, butting ring and gear
from piston end of shaft using special tool as shown.
Press all components off at the same time. Then, remove
needle bearings.
CLUTCH DISCS
NOTE: Discs on both sides of clutch are removed in the same
manner.
IMPORTANT: Reference marks are placed on the clutch
housing and end disc to aid in locating the snap ring
opening.
a - Reference Marks
7-2-20
4LHA Series