Yanmar 4LHA-HTP Operation Manual page 450

Chapter 3 Fuel Injection Equipment
3. Disassembly, Reassembly and Inspection of Fuel Injection Pump
(2) Insert the packing, delivery valve assembly, spring,
and stopper from the top of the pump, in that
order, and tighten the delivery valve holder.
Delivery value holder
tightening torque
(3) Place the control rack.
NOTE: Do not forget the rack Aux. spring.
(4) Place the control sleeve from the bottom of the
pump. Make sure the rack moves smoothly through
a full cycle.
(5) Mount the plunger spring seat A .
NOTE: 1. Be sure to mount
hollow side facing down.
2. Check again to make sure that the rack
moves easily.
(6) Mount the plunger spring.
39.2-44.1 (4.0-4.5) N(kgf)-m
the seat A with the
3-2-28
(7) Mount the plunger spring seat B on the head of
the plunger, and fit the plunger in the lower part
of pump. The match mark R-1 on the plunger
flange should be on the left as seen f r o m the
driving side of the pump.
NOTE: This is important,
mounted in opposite direction,
will be reversed.
Plunger insert device
4LHA Series
because if the plunger is
the spill way