Engine Maintenance
112
NOTE: The injection pump gear assembly is
made of two pieces, the flange and the gear.
Do not loosen or remove the four bolts that
fasten the gear to the flange because that
changes the timing.
5. Use a suitable puller to loosen the injection
pump gear from the injection pump shaft.
6. Remove the injection pump gear mounting nut
and lock washer. Use a shop rag to prevent the
lock washer or nut from falling into the gear
case.
7. Remove the injection pump from the gear
case, but leave the injection pump gear in the
gear case. This keeps the teeth on the injection
pump gear aligned properly with the teeth on
the idler gear. If you remove the injection
pump gear from the gear case you will have to
remove the gear case cover to realign the
timing marks on the injection pump gear and
the idler gear.
Injection Pump Installation
1. Place a new O-ring on the injection pump and
lubricate it with engine oil.
2. Place the injection pump in the gear case.
Rotate the injection pump shaft to mate the
key in the shaft with the keyway in the
injection pump gear. Take care to make sure
the key mates with the keyway.
3. Secure the injection pump to gear case with
previously removed hardware. Make sure to
align the index marks on the injection pump
and the gear case like they were in step 1 of
“Injection Pump Removal”.
NOTE: If a different injection pump is being
installed, see “Injection Pump Timing
TK376 Engine” on page 110 to set the
timing.
4. Secure the injection pump gear to the injection
pump shaft with the lock washer and
mounting nut. Use a shop rag, as before, to
prevent the lock washer or nut from falling
into the gear case. Torque the nut to 43 to 51
ft-lb (59 to 69 N•m).
5. Install the injection pump timing cover on the
gear case cover, and reinstall all components
removed previously to facilitate the injection
pump removal.
1. Injection Pump 5. Injection Pump Gear Mounting Nut
2. Gear Case 6. Lock Washer
3. Gear Case Cover 7. Injection Pump Gear
4. Injection Pump Timing Cover 8. O-Ring
Figure 140: TK376 Injection Pump Removal and Installation
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