Page 120
REPAIR INSTRUCTIONS, PART 1
ii. After verifying that the piston in the
companion cylinder is at TDC,
remove the inlet and exhaust valve
springs at the sides of the
hold-down yoke on the cylinder
where the unit injector is stuck. To
do this requires using an alternate
valve spring compressor (tool No.
J 41989) mounted in the injector
hold-down yoke fastener hole of
an adjacent cylinder. Compress
the valve springs, remove the
valve keepers and then slowly
release the tool and remove the
valve spring.
Use protective goggles or injury to the eyes
can occur.
Cover all passageway holes in the cylinder head
and gear train opening with shop towels.
124
Figure 124 — Removing Valve Springs with Alternate
Valve Spring Compressor (Tool No. J 41989)
iii. Position the forks of the
heavy-duty puller (tool No.
J 48922) under the lip of the unit
injector. Secure the puller by
sliding the lock collar down over
the forks. Remove the injector
from the cylinder head using hand
tools. The injector must be lifted
out along with the hold-down
yoke.
125
Figure 125 — Removing Injector with J 48922
If excessive combustion leakage has resulted in
the copper sleeve being stuck-fast to the unit
injector by carbon, the unit injector must be
replaced. The condition is found when the unit
injector is removed and the copper sleeve comes
out with the injector.
iv. Reinstall the valve spring
compressor (tool No. J 41989),
then position the inlet and exhaust
springs over the valves. Compress
the springs and install the valve
keepers. Tap the valve stem with a
soft-faced mallet to make sure the
keepers are seated properly.
Remove the compressor tool from
the cylinder head.
Companion Cylinder Camshaft Mark
1 and 6 V3 TDC
2 and 5 V6
3 and 4 V2
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