TM 5-3805-293-23-1
0011
Table 1. Engine Troubleshooting Procedures for the 120M Motor Grader - Continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
8. Engine Cranks But Will
Primary Fuel Filter and Water
Not Start - Continued
Separator Damaged or
Contaminated - Replace primary fuel
filter and water separator (WP 0174).
Secondary Fuel Filter Damaged or
Contaminated - Replace secondary
fuel filter (WP 0073).
8. Using MSD (WP 0006). Select
Cranking Speed is Less than 150
Engine ECM C6.6 120M. Select
rpm - Replace starter (WP 0099).
Status icon. Select status Group
#1 on left side of screen. Crank
engine and monitor Engine Speed
on right side of screen.
9. Using MSD (WP 0006).
a. Select Engine ECM (C6.6
120m)
b. Select status icon (WP 0006)
c.
Select status group #2 on left
of screen
d. Monitor fuel rail pressure on
right side of screen while the
engine is cranking at a
minimum speed of 150 rpm
Fuel Pressure OK - Proceed to step
e. Pressure at the fuel rail
10.
should be 25 MPa (3.625 psi
or greater)
Fuel Pressure less than Specified
Range - Replace fuel injection pump
(WP 0074).
10. Disconnect harness connector
from the engine speed sensor
(WP 0110).
11. Attempt to start the engine.
Engine Runs - Proceed to step 12.
Engine Does Not Run - Replace
engine (WP 0069).
12. Connect engine speed sensor
connector on sensor (WP 0110).
0011-9
Change 1