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Service Manual Mitsubishi SL-Series diesel engines
Version 08/2004
FUEL INJECTION PUMP
ENGLISH
FUEL SYSTEM
FUEL SYSTEM
40 FUEL INJECTION PUMP
40.1 Test on engine
Check the injection pump for items listed in the chart
below and replace it if defective. Do not attempt to
make repairs by disassembling.
40.2 Disassembly
1. Tappet guide pin
2. Lock plate
3. Tappet
4. Tappet adjusting shim
5. Lower spring seat
6. Plunger
7. Plunger spring
8. Upper spring seat
9. Control sleeve
10. Control rack
11. Delivery valve holder
12. O-ring
13. Delivery valve spring
14. Delivery valve gasket
15. Delivery valve
16. Plunger barrel
17. Pump housing
Test item Test method Criteria
Low idle speed Use a tachometer. Standard engine:
980
0
+30
min
-1
Exhaust smoke 1. Check by quickly increasing engine speed under no-load
condition.
2. Check by starting load.
No too much black or
gray smoke
Orifice discharge patter Remove injection nozzle and reinstall it with orifice toward outside
of engine. Look at discharge pattern by cranking the engine with
starter.
Good discharge
pattern
Table 4 Injection pump chart
Figure 220 Disassembly sequence
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