Yanmar 4LHA-HTP Operation Manual page 596

Chapter 7 Reduction and Reversing Gear
4. Disassembly
IMPORTANT: Thrust discs have a wave pattern. These
discs must be reinstalled in a specific pattern, when reas-
sembled. Make note of notches in thrust disc tabs, and
how they are arranged.
S S S S S S S S
a - Thrust Discs (5)
3 - Inner Discs (4)
; - Notches
S S \ S \ \ \ M
7-2-22
36. Remove discs.
37. Inspect thrust discs and inner discs for wear. Replace if
there is any questionable wear.
38. Remove and inspect disc on opposite side of clutch in
same manner.
4LHA Series