TM 5-3805-262-34
2-5. FUEL SYSTEM TROUBLESHOOTING (CONT)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1. FUEL INJECTION PUMP NOT OPERATING PROPERLY (Cont).
Step 6.
Turn test bench on but do not drive fuel injection pump. Set test
bench for high pressure phasing.
Watch test line for number 1 cylinder. There should be a steady flow
of fuel from number 1 test line as in step 4 above.
Watching fuel flow from number 1 cylinder test line, rotate test
bench drive by
Camshaft angle
should be zero
a.
b.
If camshaft
If camshaft
hand until fuel flow just stops.
as indicated by test bench degree wheel pointer
±1/2 degree.
angle is zero ±1/2 degree, go to step 7 below.
angle is not
zero ±1/2 degree, using
two open end wrenches,
loosen cylinder number 1
roller tappet adjusting
capscrew nut. If timing is
late, turn adjusting cap-
screw counterclockwise;
clockwise if timing is
early. Tighten nut and re-
check adjustment by re-
peating this step.
2-54
