Yanmar 4LHA-HTP Operation Manual page 440

Chapter 3 Fuel Injection Equipment
2. Disassembly, Reassembly and Inspection of Governor
Inspection of governor sleeve
Contact surface with shifter
Replace if:
(1) The contact surface w i t h the governor weight is
worn or there is pitching.
(2) The contact surface w i t h the shifter is consider-
ably worn or there is pitching.
(3) The governor sleeve does not move smoothly
above the cam shaft due to governor sleeve inner
dia. wear or other reasons.
Inspection of governor lever assembly
(1) Measure the clearance between the governor shaft
and bushing, and replace if it exceeds the limit.
Standard
Dimension
Governor shaft
9 . 9 8 6 ^ 9 . 9 9 5
outer dia.
Bushing inner dia. 10.060-10.110
(2) Inspect the shifter contact surface, and replace the
shifter (always disassemble by removing the pin) if
it is worn or scorched.
(3) Disassemble and replace excess fuel springs that are
settled, broken or corroded by pulling the spring
pin.
(4) Check link parts for bends or kinks that will cause
malfunctioning, and replace any parts as necessary.
NO TE: 1. Side gap on top of go vernor lever shaft.
Standard side gap
2. Replace the governor lever, tension lever,
bushing, shifter
an assembly.
Contact surface with
governor weight
Sleeve inner dia.
mm (in.)
Standard
Limit
Clearance
0.065 ~ 0.065 ~
0.124 0.124 0.5 0.5
(0.0025- (0.0025-
(0.0196) (0.0196)
0.0048) 0.0048)
mm (in.)
0 . 4 - 0.8 (0.0157-0.0315)
and throttle spring
3-2-18
Inspection of springs
(1) Check the governor spring and other springs and
replace if they are broken, settled or corroded.
(2) Measure the free length of the governor spring, and
replace if it exceeds the limit.
See the service data sheet for the free length of
the governor spring.
c l i i &
Inspection of angleich spring assembly
Replace if:
(1) There is wear to the sliding surface of the piston
or the surface which contacts w i t h the shifter.
(2) If the assembly is broken.
Inspection of torque spring assembly.
Replace if:
(1) The tip of the piston or the contact surface are
worn.
(2) The torque spring is broken.
Torque spring
A
as
4LHA Series
Angleich
spring
Piston
Contact surface