INJECTION
PUMP
INSTALLATION
Be sure the steel shims between the pump and the
cylinder block mounting are the same. These shims
maintain proper gear backlash. The numberstamped
on the cylinder block injection pump mounting pad
indicates the proper shim thickness. This thickness
does not change when a new pump is installed.
It
changes only when a new cylinder block is installed.
1.
Turn engine in direction
of
rotation (clockwise
when viewed from the front of engine) until
number one cylinder is on a compression stroke
and the
PC
mark on flywheel lines up with timing
pointer on gearcase (Figure
52).
Rotation clock-
wise also takes out all gear backlash
in
that
direction.
Look into injection pump mounting hole to verify
that one intake lobe points outward and down
45
degrees.
2.
Remove screw (Figure
55)
on side of injection
pump. Rotate drive gear until a
0.125
inch
(3.175
mm) brass rod can be inserted into drivegearslot.
This locks the gear in position when installing
injection pump on engine.
3.
With injection pump drive gear locked, place
pump
in
mounting hole. Hold pump firmly against
cylinder block.
A
slight spring pressure indicates
that the pump and camshaft gears are meshed
(Figure
56).
J
PUMP
PUMP
m
1.171
INCH
-
INSTALLED
DIMENSION
PUMP
TAPPET
LIL
u
8406
FIGURE 56.
PUMP
INSTALLED
ROTATE
GEAR
UNTIL
BRASS
ROD
SLIPS
INTO
PLACE,
LOCKING
GEAR
4.
If
gears mesh, secure pump using a flat washer,
lock washer, and nut on each stud. Torque nuts
evenly to
15
to
16
ft.-lb.
(20
to
22
Nm).
5. Remove brass rod and install timing hole washer
and screw.
ROD
FIGURE
55.
LOCKING
THE
DRIVE
GEAR
50
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