TM-9-2350-274-BD
M109/M110/M578 VEHICLES HOWITZER, MEDIUM, SELF-PROPELLED FULL-TRACKED
TECHNICAL MANUAL; OPERATORS, ORGANIZATIONAL DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE
JANUARY 1984
TM-9-2350-274-BD - Page 78 of 219
FUEL SUPPLY SYSTEM
Procedural Steps (Cent):
11.
Screw pet cock fitting (item 16) into drain hole as shown.
12.
Locate air boxheater fuel pump (item 17).
13.
Loosen nut (item 18) and disconnect fuel Iine (item 19).
14.
Remove elbow (item 4) from air box heater fuel pump outlet.
15.
Screw elbow (item 4) removed from primary fuel pump in step 10 into air box heater fuel pump
outlet.
16. Pull loose end of primary fuel filter drain hose (item 5) free from beneath engine.
TM 9-2350-274-BD
17, Connect loose end of primary fuel filter drain hose to elbow at air box heater fuel pump outlet and
secure with hose clamp from step (9).
18. Locate air box heater coil (item 6) and disconnect electrical connector (item 7).
19. Operate the fuel pump by placing FLAME HEATER MASTER SWITCH located on operator’s
control panel in “ON” position before starting engine and leave on until engine is shut off.
20, Record the BDAR action taken. When the mission is completed, as soon as practicable, repair the
vehicle using standard maintenance procedures.
Change 1
4-7
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