FUEL SYSTEM
8-12
2.3 Inspecting fuel injection pump on engine
Do not disassemble the fuel injection pump unless it is absolutely necessary.
If faulty, it is desirable to replace it as an assembly.
2.4 Disassembling and inspecting fuel injection pump
Disassembling and inspecting fuel injection pump
Disassembing sequence
Inspection item Inspection procedure Judgment
Low idling Judgment by rotation speed (Varies depending on specifica tion)
Exhaust color
Observe exhaust color during sudden acceleration under
no load.
Observe exhaust color under load.
No remarkable black smooke is
emitted.
Nozzle injection condition
Remove the nozzle and reassemble them so that spray holes
face outward. Rotate the starter to carefully observe the spray
pattern.
The spray pattem must be good.
1 Swivel nipple 8 Plunger 15 Delivery valve spring
2 Stop wire bracket 9 Plunger spring 16 Delivery valve gasket
3 Control rack 10 Spring upper seat 17 Delivery valve
4 Tappet guide pin 11 Control sleeve 18 Plunger barrel
5 Tappet 12 Lock plates 19 Pump housing
6 Tappet shim plate 13 Delivery valve holder
7 Spring lower seat 14 O-rings
Fatigue and crack
Wear and damage
Contact, wear, damage,
rust and seizure of plunger
Replace: O-ring
Replace: Gasket
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Fatigue and crack
Contact and wear
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Operating condition
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