Chapter 3 Fuel Injection Equipment
9. Pump Reassembly, Adjustment and Inspection
Key
way
Knock
pin
Fig.
7
Pin
groove
Distributing slit
Drive
disc
,
4LHA Series
6.
Drive
Shaft
Key Way and Pin
Groove
Visually
check
that
the drive shaft key way and
plunger pin groove are properly aligned.
Fig.
8
7.
Plunger
Position
Adjustment
a) VE type pump
without
plunger pre-stroke
Adjust the plunger position in the distributor
head
so
that
the dimension "K" is as
speci-
fied.
"K" is the distance from the end face
of the distributor barrel to the plunger tip
when the plunger is in the bottom dead
center position. Adjust the shim [(52) in Fig.
25] on the plunger bottom, referring to the
specified
"K" dimension.
Clearance
"K": 3.3
± 1
mm
b) VE type pump
with
plunger pre-stroke
The
plunger position must be adjusted by
checking
the
port
closure point hydraulically
on a pump test bench..With the plunger in
the bottom dead center position, apply feed
pressure
of 0.02MPa(0.2 kgf/cm
2
). Test oil
should
flow out of the measuring device
over-flow tube. Manually rotate the pump in
the proper direction.
Read
the dial indicator
when test oil stops flowing, and adjust the
shim
[(52)in
Fig. 25] on the plunger bottom
so
that
the dial reading is as specified.
3-1-46
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