Yanmar 4LHA-HTP Operation Manual page 404

Chapter 3 Fuel Injection Equipment
9. Pump Reassembly, Adjustment and Inspection
Spring seat
Fig. 10
Fig. 11
Fig. 12
c
Plunger spring
" K F "
Distributor head
Shim
1.5-2 mm „ . ^
- H - Governor shaft
8. Measurement of Plunger Spring
Barrel
Install the plunger and plunger spring in the
distributor head without the shim [(48) in Fig.
25], Push the plunger bottom lightly in an axial
direction and measure the dimension " K F " .
" K F " is the distance from the end face of the
distributor barrel to the plunger tip. Adjust the
shim (48) refering to the specified " K F " dimen-
sion.
S. Governor Shaft Installation
Install the governor shaft [(108) in Fig. 25] so
that the distance from the end face of the
pump housing flange to the governor shaft end
face is 1.5-2.0 mm.
For an injection pump installed with a Load
Timer, screw in the governor shaft so that the
distance from the end of the governor shaft to
the pump housing flange surface is 3 mm.
After adjustment, tighten the locknut to the
specified torque.
10. Testing Governor Lever Action
After reassembly, manually check the move-
ment
assembly and control sleeve.
3-1-47
Set Length
Dimension " K F " (mm)
Cam Lift (mm)
3
2.8
2.5
2.2
2.0
1.56
of the start lever,
i 4LHA Seriet
5.3 -
± 1
5.3 -
± 1
5.3 -
± 1
5.8
6:0
± 1
6.64*
1
governor lever