FUEL INJECTOR AND NOZZLE REPLACEMENT (CB534B)
THIS WORK PACKAGE COVERS
Test, Removal, Installation
Tools and Special Tools
TM 5-3895-379-23P, Figure 17
Shop equipment, general purpose (Item 30, WP
FUEL INJECTOR NOZZLE TEST
Perform the following procedures in order to determine if a fuel injector nozzle is working correctly.
Run the engine at low idle (TM 5-3895-379-10).
If leakage occurs at the nut for the fuel supply line, make sure that the fuel supply line and the nut for the
fuel supply line are correctly aligned with the inlet connection of the fuel injector nozzle.
Loosen the nut (1) for the fuel supply line (3) at each
fuel injector nozzle (2).
Listen for low idle to decrease or become
rough at each engine cylinder.
The fuel injector nozzle (2) is faulty and should be
replaced when the fuel supply line (3) is loosened
and the following events occur:
The engine rpm does not
The engine does not idle
Do not over-tighten the nut for the fuel
supply line. If the nut is tightened more,
the fuel line may become restricted or
the threads of the fuel injector nozzle and
the nut may be damaged.
Tighten each nut (1) to 14.7 lb-ft (20 Nm).