Service manual
Main Components
• Gear train
Be
sure
to
assemble
thp.
gears
by
matchinq the mating marks
as
shown in Fig 30. The backlash
of
each gear
is
0.002
to
0.005
in.
(00415toO.1154mm)
"
,.
Crankshaft gear
2.
Oil
pump
drive gear
3.
Idle
gear
4.
Camshaft gear
5.
Fuel injection
pump
drive
gear
Fig.
30.
Mating Marks
of
Gear Train
• Crankshaft gear
Heat
to
about 176°F
(BO°C)
and slide on crankshaft
If
the
shaft and
hore dimensions
iJ[P
such that the
qear
will
not
slide
easily.
it
may be
heatp.d
to a
slightly
higher temperature
for
installation.
• Camshah
gear
Rp.fer
to
Fig. 31.
Place
the camshaft retainer plate
on
the
camsh;Jft first. Shim the camshaft retainer
rlatr~
out
from
the
camshaft
0.003
to
0.009
in. (0.07
to
0.22
mm)
with
shims
that
can
be
pulled'
nut
after the gear
is
installed. Heat the gear
to
aprroximately
176°F
(BO°C)
and sl'ide on the shaft
until
it
hlJtts
up
aqainst the retainer plate. Remove sracer shims.
If
thp
qe;'H
will
not
slide on the shaft easily
it
tno
may be heated
to
a slightlY highp.r ternperature
as
descrrbed above.
0.003
-.
0.009in. (0.07 - 0.22mm)
1.
Camshaft gear
4.
Cir·clip
2.
Camshaft
5.
Pin
plug
3.
Camshaft retainer plate
6.
Key
Fig. 31. Assembly
of
Camshaft Gear
with
Camshaft
(13)
• Camshaft and camshaft bearings
Standard dimensions are shown in Fig. 32.
Camshaft running
clearance is:
0.002
to
0.004 in.
(0.05
to
0.091
mm)
16
H.
P.
~
24
H.P.
rll
~
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If
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1.572-1.573
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Fig. 32. Standard Dimensions
of
Camshaft
and
Bearings
.-