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Group 23 Fuel System
154
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Preparing for disassembly
1. Clean the outer surface of the injection pump
and mount the pump on the pump assembly
stand.
2. Remove the drain plug from the bottom of the
pump and drain oil from the case.
4. Remove the coupling, lfywheel and feed pump.
Removing delivery valves
1. Remove delivery valve holders. Remove the
stopper, delivery valve spring, delivery valve and
valve seat from each valve holder.
NOTE! Place each pair of delivery valve and valve
seat in clean diesel fuel. Do not swap the original
combinations of delivery valves and valve seats.
Removing plunger assemblies
1. Position the cam at the bottom dead center in
the cylinder from which the plunger assembly is
removed.
2. Remove the deflector bolt located on the back
side of the pump case.
IMPORTANT! Be sure to remove the deflector
before removing the plunger assembly. If the
plunger assembly is removed without removing
the deflector bolt first, damage results in the
deflector bolt and plunger assembly.
3. Screw the Plunger holder (48291-00301) in the
threaded hole on the upper end of the plunger.
4. Loosen two barrel bolts altemately, and lift the
plunger assembly and remove.
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