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TM 10-3930-638-24&P
4-3. FUEL SYSTEM MAINTENANCE (cont)
b. Fuel Injection Pump (cont).
STEP
LOCATION
ITEM
ACTION
REMARKS
TESTING
NOTE
Test bench must use calibrating nozzles type DN12SD12 (open-
ing pressure 2500 psi) and injection lines shall be 3/32 inch ID
by 20 inches long; holder BKB50SD and 0.5 MM plate and lines
1/16 inch ID by 25 inches long; Mobil Velocite No. 3 calibrating
oil and calibrating oil temperature at 110-115 degrees F. Test
stand coupling should be of the self-aligning zero backlash type.
Mount and drive the pump according to the test bench manu-
38
39
facturer’s instructions.
Transfer pump
a. Plug (91)
Remove
(end plate
b. Sleeve (92)
Install pump
(88))
inlet
connector
Housing
a. Four screws
Remove
(124)
b. Two timing
Remove
line covers (125)
NOTE
Pump rotation is counterclockwise as viewed from
of pump,
Connect a +24 Vdc battery and switch to solenoid
top of governor control cover (22)
c. Switch connected
Place in on
to battery
position
d. Pump throttle
Move to full
shaft
load position
assembly (37)
Use two wrenches so pump outlet fitting
does not move at the same time. Install
transfer pressure gauge adapter P/N
21900, then a shutoff valve to isolate
gauge when not in use. Connect pressure
gauge to adapter P/N 21900
Install P/N 19918 advance windows in
NOTE
1 to 3 PSI supply pressure is required at pump inlet.
place of timing line covers
drive shaft end
terminals at
When transfer pump is primed, bleed fuel
for several seconds by loosening injection
line nuts at fuel nozzles; then tighten nuts
securely
4-128
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