PRESS BEARING
FLUSH WITH
BOn-OM OF
RECESS
REAR
EARING
BEARING
.9-3
1/32
2
1/16
FIGURE
61.
CAMSHAFT
BEARINGS
ANKSHAFT WASHER
FIGURE
62.
CAMSHAFT
ENDPLAY
2-1/4
x
20
PULLER
PRESS BEARING
FLUSH WITH
FRONT CRANK-
CASE
SURFACE
-
ALIGN OIL
HOLES
FRONT
8
EA
RI
N
G
Press new bearings into place, Figure 61. 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. Afterthe rear bearing is installed,
insert a new expansion plug in the recess, using
sealing 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 onto shaft. Measure camshaft
end play: it should be
0.007
inch to
0.039
inch
(0.178 to
0.991
mm). See Figure
62.
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
63.
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
Onan diesel engines use a counter-balanced, ductile
iron crankshaft.
To
increasetheshaftfatigue durabili-
ty, all crankpin fillets are shot-peened during
manufacture.
FIGURE
63.
TIMING
MARKS
51
To Next Page
Loading...
Need help?
General
