V
PRESS
BEARING
FLUSH
WITH
BOTTOM
OF
RECESS
REAR
EARING
PRESS
BEARING
FLUSH
WITH
FRONT
CRANK-
CASE
SURFACE
ALIGN
OIL
HOLES
FRONT
BEARING
BEARING
FIGURE
112.
CAMSHAFT BEARINGS
NKSHAFT
WASHER
E
FIGURE
113.
CAMSHAFT ENDPLAY
FIGURE
114.
TIMING
MARKS
Press new bearings into place, Figure
112.
Press the
rear bearing flush with the bottom of the expansion
plug recess. Press the front bearing in flush with the
crankcase front surface
so
the oil passages are
aligned.
Do
not attempt to ream the bearings as they
are a precision type. After rear bearing is installed,
insert a new expansion plug
in
the recess, using seal-
ing compound, and expand
it
into place with sharp
blows at its center.
Installation,
Camshaft
Assembly
1. Install key and press camshaft gear on camshaft
until
it
bottoms on flange with no clearance.
2.
Install governor components.
3.
Slide thrust washer ontoshaft. Measure camshaft
end play;
it
should be0.007 to0.039 inch
(0.178
to
0.991
mm). See Figure
113.
4.
Lay engine on its side
or
end and insert push rod
tappets.
5.
Install camshaft assembly
in
engine. Align timing
marks on camshaft gear and crankshaft gear. See
Figure
11.4.
6.
Replace push rods and fuel transfer pump.
7.
When engine is reassembled, install injection
pump following the steps for
Injection
Pump
Installation
in
the
FUEL
SYSTEM
section. This
step is critical.
CRANKSHAFT
The
DJ
Series engines use a counter-balanced duc-
tile iron crankshaft. To increase shaft fatigue durabil-
ity, all crankpin fillets are shot-peened during manu-
facture. The two-cylinder crankshafts ride on two
lead-bronze bearings; the front one is housed
in
the
crankcase, and
the
rear one is in the bearing plate.
The four-cylinder model uses an additional main
bearing with a split-center.
85
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