TM 5-3805-280-24-2
Fuel System Operation and Tests
MEASURE FUEL SUPPLY PUMP PRESSURE
115
40
(IN-LINE INJECTION PUMPS)
1. Remove plug on fuel filter base.
2. Install test equipment as shown.
3. Start engine and run at 2400 rpm. Fuel pump should
maintain minimum positive pressure listed below. If
pressure is low, replace filter element and recheck
pressure.
Minimum Positive Pressure at 2400 rpm Engine Speed--
Specification
Pressure ........................................................... 69 kPa (0.69 bar) (10 psi)
Minimum Flow at 2400 rpm Engine Speed--Specification
Flow ......................................................................... 2.0 L/min. (0.53 gpm)
If pressure is still low, perform the following:
1. Disconnect pump-to-filter fuel line at the filter.
2. With throttle set at no-fuel position (or injection pump
shut-off solenoid wire disconnected) so engine will not
start, turn engine over several times with starting
motor.
3. If fuel spurts from the line, the pump is operating
properly.
NOTE: Look for a possible restriction in filter/filter base.
Make sure pressure gauge/hose assembly is not
at fault.
DPSG,OUO1004,152
1929JUN981/1
13-567
