Thermo King UT-1200, Manual

Page: 103 / 169

Engine Maintenance
103
Injection Pump Removal and
Installation
Injection Pump Removal
1. Note the alignment of the index marks on the
injection pump and the gear case. If they are
not marked, mark them so the injection pump
can be returned to the same position when it is
reinstalled.
2. Remove the throttle linkage, fuel lines, wire
harness, and mounting hardware from the
injection pump.
3. Remove the injection pump timing cover from
the gear case.
4. Loosen the injection pump gear mounting nut,
but do not remove it yet.
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” on to
set the timing.
1. Index Marks
Figure 173: Index Mark Location
1. Index Mark on Injection Pump
2. Index Mark on Gear Case
Figure 174: Index Mark Alignment
1
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