Yanmar 4LHA-HTP User Manual

Chapter 7 Reduction and Reversing Gear
3. Inspection and Servicing
4LHASe
3-6 Thrust coiler A and B for clutch shaft
Oilfiller Oil filler case
Spring retainer
. Thrust collar A /
Cu
P
s
P
rin
9
^- / / / Clutch gear (A)
Thrust collar
Clutch shaft
Snap spring
Thrust coiler B
Clutch gear (B)
Cup spring
Spring retainer
Thrust collar A Q
r
j
ve
g
ear
(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
Thrust collar B
— Sliding surface
^—Sliding surface
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
Spring retainer
mm (in.\
mm (in.)
Stepped wear
Standard
Limit
Thrust collar A, t!
t
0
-
1
1
(0.0039)
0.05
(0.0020)
Thrust collar g' £
t
10
2
(0.0394)
0.7
(0.0276)
Standard
Limit
Cup spring, T
2.86 ~ 3.06
(0.1126-0.1205)
2.66
(0.1047)
Spring retainer, T
2.92 ~ 3.08
(0.1150-0.1213)
2.8
(0.1102) ^
7-1-13

Yanmar 4LHA-HTP Specifications

General

Brand	Yanmar
Model	4LHA-HTP
Category	Engine
Language	English