FUEL SYSTEM TESTS, INSPECTIONS, AND ADJUSTMENTS - CONTINUED
FUEL SYSTEM PRESSURE TEST - CONTINUED
Checking Fuel Pressure After Secondary Filter - Continued
C AU T I O N
Contaminants may cause rapid wear and shortened component life.
Ensure fluids are contained during performance ofinspection, maintenance, testing, adjusting, and
Dispose of all fluids according to local regulations.
N OT E
Fuel pressure readings near fuel supply manifold have pressure spikes. Pressure spikes are caused by excess
fuel returning to fuel system from injectors. Excessive needle movement at gage may be present. Connect
gage with section of suitable hose. Air in the hose absorbs the spikes. This achieves an average reading and
a steady needle. Keep gage above measuring point.
Install differential pressure gage in port (1).
Start engine (TM 5-3805-291-10).
Run engine in no-load condition at 1,800 rpm (TM 5-3805-291-10).
N OT E
If excessive pressure is found, check the conditions listed under High Fuel Pressure in this work package.
Record pressure. Fuel pressure should be 85 psi (586 kPa) nominal.