Yanmar 4LHA-HTP Operation Manual page 438

Chapter 3 Fuel Injection Equipment
2. Disassembly, Reassembly and Inspection of Governor
2-1 Governor d i s a s s e m b l y
(1) Remove the governor case cover.
(2) Remove the angleich spring assembly.
(3) Remove the governor case bolt. Remove the
governor case (parallel pin) from the fuel pump
unit while lightly tapping the governor case with
a wooden hammer.
governor case and f u e l pump by moving only the
moving parts of the governor lever.
(4) Remove the connecting spring by inserting needle
nosed pliers between the fuel pump and governor
case.
(5) Slide the governor case and fuel pump apart and
pull out the link pin of the fuel control rack.
(6) Remove the snap-rings on both ends of the governor
lever shaft.
Make a gap between the
3-2-16
(7) Put a rod (10 mm (0.3937 in.) in dia. or less) in
one end of the governor lever shaft, and tap the
governor shaft until the O-ring comes out f r o m the
other side of the governor case.
(8) After removing the O-ring, lightly tap the end of
the shaft from which you removed the O-ring, and
remove the governor lever shaft. Then remove the
governor shaft assembly and washer.
(9) Unhook the governor spring
lever and control lever shaft.
Note: The governor assembly consists of the governor
lever, tension lever, bushing,
and shifter, and is normally
The spring pin is removed
the shifter or throttle
4LHA Series
from the tension
throttle spring
not disassembled.
when you replace
spring.