TM-9-2330-356-14
SEMITRAILER, TANK: 5000 GALLON, BULK HAUL, SELF LOAD/UNLOAD M967 AND M967A1; SEMITRAILER, TANK: 5000 GALLON, FUEL DISPENSING, AUTOMOTIVE M969 AND M969A1; SEMITRAILER, TANK: 5000 GALLON, FUEL DISPENSING, UNDER/OVERWING AIRCRAFT M970 AND M970A1
TECHNICAL MANUAL; OPERATOR’S, UNIT, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL
OCTOBER 1990
TM-9-2330-356-14 - Page 259 of 528
TM 9-2330-356-14
(2) Connect fuel pressure gage to output port of
pump.
(3) Turn engine switch to RUN position.
Pressure gage should register 6-7 psi.
(4) Replace defective pumps.
b.
Servicing Fuel System (Fig. 4-102).
CAUTION
Drain plug on fuel filters can take only a
limited amount of torque. Use two wrenches
in combination for breaking plugs loose and
for final tightening.
(1)
Draining Water From Fuel System.
(a)
Daily, drain water from both fuel filters.
Loosen but do not remove drain plug (fig. 4-102) at
bottom of filter. Allow fuel to drain until clear of water.
Tighten drain plug.
(b)
If fuel system is badly contaminated with
water, drain water and fuel from tank (step (2)).
(2)
Draining Fuel Tank.
(a)
Place a suitable container under fuel
tank and remove drain plug (fig. 4-105). Drain fuel into a
suitable container.
(b)
Flush tank with clean diesel fuel and
replace drain plug.
TA099842
Figure 4-102. Location of Drain Plugs on Fuel Filters.
(c)
Refill tank with fresh fuel. Use No. 1
diesel fuel (item 15, Appendix E) for operation below
32°F and No. 2 diesel fuel (item 14, Appendix E) for
operation above 32°F.
c .
Servicing Fuel Filters. Service
primary fuel filter
and electric fuel pump filters after every 600 hours.
Service secondary fuel filter after every 3000 hours.
Service filters sooner if loss of power is indicated. Service
first the fuel pump filters and then the primary and
secondary fibers.
(1)
Electric Fuel Pump Filter (Fig. 4-103).
(a)
Place a suitable container under pump
to collect any fuel that will spill from fuel pump.
(b) Use a wrench to turn bottom cover
(fig. 4-103) from bayonet pins. Twist cover off.
TA099843
Figure 4-103. Electric Fuel Pump Filter
WARNING
Dry cleaning solvent P-D-680 is toxic and
flammable. Always wear protective goggles
and gloves, and use only in a well-ventilated
area. Avoid contact with skin, eyes, and
clothes, and DO NOT breathe vapors. DO
NOT use near open flame or excessive heat.
The solvent’s flash point is 100°F-138°F
(38°C-59°C). If you become dizzy while
using cleaning solvent, immediately get fresh
air and medical help. If solvent contacts eyes,
immediately wash your eyes with water and
get medical aid.
(c)
Remove filter, magnet, and cover
gasket. Replace filter or clean in dry cleaning solvent
(item 11, Appendix E) and blow dry. Discard gasket.
Install magnet, new gasket, filter, and tighten cover.
4-123
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