Yanmar 4LHA-HTP Operation Manual page 549

Chapter 7 Reduction and Reversing Gear
3. Inspection and Servicing
3-6 Thrust coiler A and B for clutch shaft
O i l f i l l e r
(1) Visually inspect the sliding surface of thrust collar A or
B to check for signs of overheating, scoring, or cracks.
Replace the collar if any abnormal condition is found.
(2) Measure the thickness of thrust collar A or B, and
replace it when the dimension exceeds the specified
limit.
Thrust collar A
— Sliding surface
Stepped wear
Thrust collar A, t!
t
1
Thrust collar g ' £ t
2
Oil filler case
Spring retainer
. Thrust collar A /
^ -
Snap spring
Thrust coiler B
Clutch gear (B)
Cup spring
Spring retainer
Thrust collar B
^ — S l i d i n g surface
mm (in.\
Limit
Standard
0.05
-
0 1
(0.0039)
(0.0020)
0.7
1 0
(0.0276)
(0.0394)
P P 9
C u s r i n
/ / / Clutch gear (A)
Thrust collar
Thrust collar A Q j g
r v e e a r
3-7 Cup spring and spring retainer
(l)Check for cracks and damage to the cup spring and
spring retainer. Replace the part if defective.
(2(Measure the free length of the cup spring and the thick-
ness of the spring retainer. If the length or the thickness
deviates from the standard size, replace the part.
Cup spring
Å
C u p spring, T
Spring retainer, T
7-1-13
4LHASe
Clutch shaft
Spring retainer
mm (in.)
Limit
Standard
2.66
2.86 ~ 3.06
(0.1047)
( 0 . 1 1 2 6 - 0 . 1 2 0 5 )
2.8
2.92 ~ 3.08
(0.1102)
( 0 . 1 1 5 0 - 0 . 1 2 1 3 )
^