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 TM 10-3930-638-24&P
4-3. FUEL SYSTEM MAINTENANCE (cont)
b. Fuel Injection Pump (cont).
INSPECTION
17
Housing
a. Housing
Seal seats, bores and threads
(133)
b. Drive shaft
Measure distance across flats
(5)
of drive tang (see below);
distance must not be less
than 0.305 inch. Shaft dia-
meter in drive shaft seal area
must be free of nicks and
scratches. Moderate shaft
wear from the seal lips is
normal
18
Hydraulic
a. Hydraulic
Central and metering valve
head (81)
head (81)
bores and ports
b. Vent wire
Check vent wire for freedom
(132) and
of movement. If wire is
retainer
free, flush head and blow out
(131)
all passages with clean, dry
air (see below). If wire is
stuck in screw remove and
replace after a thorough
cleaning of the unit and
hydraulic head passage
4-106
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