Yanmar 4JH2E Service Manual page 84

Chapter 3 Fuel Injection Equipment
J. Disassembly, Reassembly and Inspection of Fuel Injection Pump
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~4JH
Serks
(8) Inspection of oil seals
Inspect oil seals to see if they are burred or scratched.
(9) Inspection of roller guide stop
Inspect the side of the tip, replace if excessively
war~.
(10)
Inspection of 0-rings
Inspect and replace if they are burred or cracked.
3.3 Reassembly of fuel injection pump
Preparation
After inspection, put all parts in order and clean.
See Inspection of Fuel Pump for inspection procedure.
(1) Put in the plunger barrel from the top of pump.
NOTE: Make sure the barrel key groove is fitted properly
to the barrel stop pin.
(2) Place the delivery valve assembly, packing, spring and
stopper from the top of the pump, in that order.
NOTE: Replace the delivery valve packing and O·ring.
Printed in Japan
A0Al029-9002
3-19
(3) Place the control rack, and tighten the control rack stop
bo~.
NOTE: 1. Do not forget the rack aux. spring.
2. Make sure the rack moves smoothly through
a
full cycle.
(4) Place the rack set screw (using the special tool) in the
rack stop bolt screw hole to fix the rack.
(5) Looking from the bottom of pump, align the match
marks on the rack and pinion.
(6) While holding the pinion with one hand and keeping it
aligned with the match mark, fit in the sleeve, and light·
ly tighten the small pinion screw.
NOTE: Fitting of sleeve; Face towards small pinion
screws and align with match mark.
Pinion/sleeve match mark
Maleh mark