FUEL SYSTEM - DISASSEMBLY, INSPECTION AND REASSEMBLY
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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 Description PASS criteria
Low idle speed Inspect the low idle speed
1000±25 min
-1
Exhaust gas color 1) Observe the exhaust gas color during no-load
rapid acceleration
2) Observe the exhaust gas color under load
No excessive black smoke
Nozzle injection pattern 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.
Good spray pattern
2.2 Disassembling the fuel injection pumps
①Tappet guide pin
②Lock plate
③Tappet
④Tappet adjusting shim
⑤Spring lower seat
⑥Plunger
⑦Plunger spring
⑧Spring upper seat
⑨Control sleeve
⑩Control rack
⑪Delivery valve holder
⑫O-ring
⑬Delivery valve spring
⑭Delivery valve gasket
⑮Delivery valve
⑯Plunger barrel
⑰Pump housing
Replace: Gasket
Replace: O-ring
Replace: Lock plate
Disassembly of the fuel injection pumps
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