Fuel Injection Pumps; Inspecting The Fuel Injection Pumps On Vehicle; Disassembling The Fuel Injection Pumps - Mitsubishi diesel engines Service Manual

2. Fuel Injection Pumps

2.1 Inspecting the fuel injection pump on
vehicle
Do not disassemble the fuel injection pump
unless it is necessary.
If the pump is suspected to be faulty, it is
recommended that the entire pump assembly be
replaced.
Inspection item
Low idle speed
Exhaust gas color
Nozzle injection pattern

2.2 Disassembling the fuel injection pumps

‡ @ Tappet guide pin
‡ A Lock plate
‡ B Tappet
‡ C Tappet adjusting shim
‡ D Spring lower seat
‡ E Plunger
‡ F Plunger spring
‡ G Spring upper seat
‡ H Control sleeve
‡ I Control rack
‡ J Delivery valve holder
‡ K O-ring
‡ L Delivery valve spring
‡ M Delivery valve gasket
‡ N Delivery valve
‡ O Plunger barrel
‡ P Pump housing
FUEL SYSTEM - DISASSEMBLY, INSPECTION AND REASSEMBLY
Description
Inspect the low idle speed
1) Observe the exhaust gas color during no-load
rapid acceleration
2) Observe the exhaust gas color under load
To inspect the spray pattern, remove the nozzle
from the engine and then place the nozzle outside
by correcting the injection pipe. Crank the starter
and check the spray pattern.
Disassembly of the fuel injection pumps
PASS criteria
-1
1000• } 25 min
No excessive black smoke
Good spray pattern
Replace: O-ring
Replace: Gasket
Replace: Lock plate
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