TM 5-2420-230-24-2
Fuel Transfer Pump - Piston Style Rebuild
Section 6 - Injectors - Group 06
Page 6-14
B Series Shop Manual
To inspect the transfer pump, pour clean diesel fuel or
engine oil into the inlet connection and perform the fol-
lowing test:
Inspect the diaphragm by blocking the fuel inlet line with
your finger and operating the priming lever.
A good pump will have suction that will not bleed down
until the finger is removed from the inlet.
On diaphragm style fuel transfer pumps, parts replace-
ment is not practical; the pump is serviced as an assem-
bly. An optional piston style pump is available which can
be cleaned and repaired with a minor repair kit.
Fuel Transfer Pump - Piston Style
Rebuild
Preparatory Step:
Clean debris from the fuel line fittings and the fuel
transfer pump.
20 mm, 26 mm Wrench
Caution: The hand-prime fitting and inlet fitting are
spring loaded. Sudden removal of these two fittings can
cause personal injury.
Secure the pump in a vise, taking care not to damage the
pump housing.
Remove the rubber boot from the hand-prime fitting.
Remove the three illustrated fittings.
L-368
