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Page Title:
Table 6-7. Camshaft and Timing Gear Specifications |
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 TM 10-3930-633-34
(3) Zero the dial indicator. Position a large
Checks
screwdriver between the camshaft gear and the
block. Pull the camshaft forward and release it.
a. End Play Check.
Compare the dial indicator reading with the
(1) Remove the crankshaft damper and
specifications of table 6-7.
cylinder front cover. (See procedures in Section
VII.)
(4) If the end play is excessive, check the
spacer for correct installation before it is
(2) Push the camshaft toward the rear of the
removed. If the spacer is correctly installed,
engine. Install a dial indicator so that the in-
replace the thrust plate.
dicator point is on the camshaft gear attaching
screw (fig. 6-50).
(5) Remove the dial indicator.
b. Timing Gear Backlash Check.
(1) Install a dial indicator on the cylinder
block as shown in figure 6-51.
ITEM
lNCHES
CAMSHAFT
Lobe lift - intake
.. 0.2490
Lobe lift-exhaust
0.2490
Lobe lift - allowable wear
.0.005
End play . . . .
.0.001-0.007
End play - wear limit
0.009
Journal to bearing clearance
0.001.0.003
Journal to bearing clearance - wear limit
0.006
Journal runout - maximum
.0.008
Journal out-of-round - maximum
0.005
Journal diameter - std
2.0170-2.0180
Bearing inside diameter
.2.0190-2.0200
No. 1 bearing setback
. .0.020-0.035
TIMING GEAR
Backlash
0.002-0.004
Camshaft gear face runout
0.006 TIR
C r a n k s h a f t gear face runout
.0.003 TIR
(2) Turn the camshaft gear counterclockwise
backlash reading. Refer to table 6-7 for backlash
by hand to take up backlash and set the indicator
limits.
to zero with the plunger against one gear tooth.
c. Timing Gear Runout.
(3) Hold the camshaft gear firmly against
(1) Install dial indicator to the cylinder block
the block and rotate the gear clockwise to obtain
as shown in figure 6-52.
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