FUEL SYSTEM TESTS, INSPECTIONS, AND ADJUSTMENTS - CONTINUED
FUEL SYSTEM PRESSURE TEST
N OT E
Pressure test measures output pressure of fuel transfer pump. Low fuel pressure and starting difficulty
may be indications of problems with fuel transfer pump.
Fuel transfer pump is located on left side of machine at top of primary fuel filter.
Disconnect hose (1) from fuel outlet port at base of
primary fuel filter (2).
Install fuel pressure gage to fuel outlet port.
Prime fuel system (WP 0029 00), to eliminate air from fuel transfer pump.
Turn engine start switch to ON position (TM 5-3805-290-10). Record maximum pressure. Pressure indication on gage
should be 10 psi (67 kPa).
If pressure is less than minimum pressure, replace fuel transfer pump (3) (WP 0031 00).
Observe rate at which pressure drops. If pressure drops to one-half of maximum pressure in less than 30 seconds,
replace fuel transfer pump (3) (WP 0031 00).
Remove pressure gage from fuel outlet port. Connect hose (1) to fuel outlet port. Prime fuel system to eliminate air from
fuel system (WP 0029 00).