Fuel Injection Pump; Inspecting Fuel Injection Pump On Engine; Disassembling And Inspecting Fuel Injection Pump - Mitsubishi Heavy Industries SL Series Service Manual

FUEL SYSTEM

2.2 Fuel injection pump

2.2.1

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.
Inspection item
Low idling
Exhaust color
Nozzle injection condition
2.2.2

Disassembling and inspecting fuel injection pump

Disassembing sequence
1 Tappet guide pin
2 Lock plate
3 Tappet
4 Tappet adjusting shim
5 Spring lower seat
6 Plunger
8-8
Inspection procedure
Judgment by rotation speed
Observe exhaust color during sudden acceleration under
no load.
Observe exhaust color under load.
Remove the nozzle and reassemble them so that spray holes
face outward. Rotate the starter to carefully observe the spray
pattern.
11
12
13
14
15
16
Disassembling and inspecting fuel injection pump
7 Plunger spring
8 Spring upper seat
9 Control sleeve
10 Control rack
11 Delivery valve holder
12 O-ring
(Varies depending on specification)
No remarkable black smooke is
emitted.
The spray pattem must be good.
Replace
Replace
6
17
1
2
Replace
10
9
8
7
5
4
3
13 Delivery valve spring
14 Delivery valve gasket
15 Delivery valve
16 Plunger barrel
17 Pump housing
Judgment