TM 5-3805-293-23-1
0011
Table 1. Engine Troubleshooting Procedures for the 120M Motor Grader - Continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
16. Intermittent Engine
2. Inspect air inlet system for
Air Inlet System is Blocked or Dirty
Shutdown - Continued
damage, blockage, and
- Clean and remove blockage from air
cleanliness (WP 0037).
inlet system components (WP 0037).
Air Inlet System Components are
Damaged - Replace damaged
components (WP 0115, WP 0078, and
WP 0103).
3. Check for correct installation of
Loose Connections - Tighten loose
the Engine ECM harness
connections.
connectors (WP 0009, Figures 3
and 14) and fuel injection pump
solenoid harness connector (WP
0009, Figure 42).
4. Inspect the battery cables, wiring,
Connections Dirty/Loose - Clean
and connections in the charging
and tighten all connections as
circuit (WP 0066 and WP 0195)
required (WP 0066 and WP 0195).
for frays, damage, corrosion and
Battery Cables Damaged - Replace
loose connections.
battery cables as needed (WP 0195).
Alternator Cables/Wiring Damaged
- Replace alternator cables or wiring
as required (WP 0066).
5. Perform Fuel Quality Test (WP
Fuel System is Contaminated -
0035).
Drain fuel (WP 0229), replace primary
fuel filter (WP 0174), replace
secondary fuel filter (WP 0073), and
fill with correct fuel (TM 5-3805-293-
10) for machine operation.
6. Perform Fuel System Inspection
Fuel Rail Lines Leaking - Replace
(WP 0035).
fuel rail lines (WP 0072).
Low Pressure Fuel Lines Leaking -
Tighten lines (WP 0173).
Low Pressure Fuel Lines
Restricted/Damaged - Replace low
pressure (WP 0173).
Primary Fuel Filter and Water
Separator Damaged or
Contaminated - Replace primary fuel
filter and water separator (WP 0174).
Secondary Fuel Filter and Water
Separator Damaged or
Contaminated - Replace secondary
fuel filter (WP 0073).
7. Verify that the low pressure fuel
Lines Loose or Not Secured -
lines are tight and secured
Tighten lines and secure as needed
properly (WP 0173).
(WP 0173).
Change 1
0011-16
