TM 5-3895-373-34
2.19
REPLACE/REPAIR FUEL INJECTION PUMP - Continued.
F.
TEST.
1.
PERFORM
IMMERSION
LEAK
TEST
BY
SEALING OFF LOW PRESSURE OUTLET ON
FUEL INJECTION PUMP AND INSTALLING
AIR COMPRESSOR LINE INTO PUMP INLET
CONNECTION. RAISE AIR PRESSURE IN
FUEL INJECTION PUMP TO 20 LB-IN2 (1,41
KG/CM2).
IMMERSE
PUMP
IN
CLEAN
CALIBRATING FLUID FOR 10 MINUTES TO
ALLOW TRAPPED AIR TO ESCAPE, THEN, IF
NO LEAKS ARE DETECTED, REDUCE AIR
PRESSURE TO 2 LB-IN2 0,14 KG/CM2) FOR 30
SECONDS. IF PUMP STILL DOES NOT LEAK,
RAISE AIR PRESSURE AGAIN TO 20 LB-IN2
(1,41 KG/CM2) FOR 30 SECONDS. IF NO
LEAKS ARE DETECTED, THEN REMOVE
PUMP FROM CALIBRATING FLUID AND
DISCONNECT AIR COMPRESSOR LINE.
2.
SET UP FUEL INJECTION PUMP TEST BY
MOUNTING FUEL INJECTION PUMP TO
FUEL INJECTION PUMP TESTER. REFER TO
TM 9-4910-778-14&P.
Fuel injection pump operates in a clockwise
direction, viewed from drive end. Do not
operate
fuel
injection
pump
in
a
counterclockwise direction during testing.
Damage to fuel injection pump can result
from
operation
in
a
counterclockwise
direction.
3.
TEST FUEL INJECTION PUMP FOR PRIMING,
TRANSFER PRESSURE, ADVANCE SETTING,
FULL ADVANCE, BACK LEAKAGE, MAXIMUM
DELIVERY
SETTING,
DELIVERY
CHECK,
GOVERNOR SETTING, CUTOFF OPERATION,
THROTTLE
OPERATION,
SOLENOID
SHUTOFF OPERATION, AND TIMING. REFER
TO TM 9-4910-778-14&P.
NOTE
Use only calibrating fluid as specified in
Appendix B.
a.
Use calibrating fluid at 104°F (40°C), with
nozzle opening pressure at 172 +3 -0 bar.
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