--------------CHAPTER1
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5. Withdraw the retaining bolts, and remove
the front cover and gasket, Figure 24.
Timing
Gears
1.
Camshaft
Gear
4. Injection
Pump
Drive
2.
Crankshaft
Gear
Gear
3.
Camshaft
Idler
Gear
NOTE:
The
crankshaft
timing
gear
No. 2,
Figure
25,
should
not
be
removed. The
gear
is
heat
shrunk
on to the crankshaft
and
aligned
to the
crankshaft
No. 1
pin
to
0.004
in (0.10mm).
If
the
gear
is
damaged
a
new
crankshaft
is required.
6. Before removing the timing gears,
Figure 25, use a dial indicator or feeler
gauge, Figure 26, to measure the back-
lash between each
set
of
gears.
Timing
Gear
Backlash
1.
Feeler
Gauge
7. Rotate the gears and check the backlash
using a feeler gauge or dial indicator
at
four equal points on the gears. Renew if
the backlash exceeds the following,
Figure
26:-
Backlash to crankshaft gear:
0.006--0.018
in
(0.15--0.46mm)
17
Backlash to camshaft gear:
0.006-0.018
in (0.15-0.46mm)
Backlash to fuel injection pump gear:
0.004-0.021 in (0.10-0.53mm)
CAMSHAFT
DRIVE
GEAR
Camshaft
End Play
Measurement
1.
Lever 3.
Camshaft
Gear
2.
Feeler
Gauge
4.
Thrust
Plate
1.
Pry the camshaft gear using a lever away
from thrust plate. Using a dial indicator
or
feeler gauge, check the clearance to
0.002-0.007
in
(0.076--0.35mm). If out-
side
of
limits fit a
new
camshaft thrust
plate, Figure 27.
2.
Remove the camshaft idler
gear
retaining
bolt, gear and adaptor from the block,
then remove the camshaft
gear
bolt and
disassemble.
3. Remove retaining nut and
washer
from
the fuel pump and remove the
gear
from
the shaft using a puller. For more informa-
tion refer to
"FUEL
SYSTEMS"
Part
2.
Inspection and repair of gears
1 . Wash the gears using a suitable solvent
and examine
gear
teeth for wear, burrs
or
scratches. Minor marks can be removed
using a fine abrasive, thoroughly clean
before re-assembly.
2.
Ensure the camshaft idler gear adaptor is
free from obstruction and bushing is not
damaged. Camshaft key and
key-way
should be checked for damage and re-
paired as required.
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