TM 9-2350-256-20-1
UNIT MAINTENANCE
RECOVERY VEHICLE, FULL TRACKED: MEDIUM, M88A1
NSN 2350-00-122-6826, EIC AQA
FUEL, AIR INTAKE, AND EXHAUST SYSTEMS TROUBLESHOOTING PROCEDURE
INITIAL SETUP:
Tools and Special Tools
References (cont.)
Tool kit, general mechanic's (item 59, WP 0490 00)
Personnel Required
Mechanics (2)
References
WP 0336 00
WP 0342 00
WP 0364 00
Troubleshooting Procedure
Fuel, Air Intake, and Exhaust Systems
Symptom
Fuel, air intake, or exhaust systems malfunctioning.
Malfunction
Engine starts running, but fails to stay running.
Do steps 1 thru 5.
Engine fails to shut off when engine fuel shutoff switch is activated. Do step 6.
Engine fails to stop when fuel shutoff handle is pulled.
Do step 7.
Engine stalls at low rpm, does not develop full power, and has excessive smoke from one or both banks of cylin-
ders.
Do steps 8 and 9.
Engine stalls at low rpm, does not develop full power, but exhaust smoke is normal. Do steps 10 thru 13.
Engine runs rough or misfires, knocks, and/or fuel consumption is excessive. Do step 14.
CORRECTIVE ACTION
1.
With MASTER switch and in-tank fuel pump switch in ON position, electric fuel pump will make a
noise. If there is no noise, troubleshoot electric fuel pump circuit (see WP 0047 00). If there is noise go
to step 12 and perform fuel flow test.
2.
Disconnect fuel line connecting primary fuel filter and main fuel check valve at main fuel check valve.
Place fuel line in a suitable container. Place MASTER and fuel pump switches in the ON position. If
there is no fuel flow, clean filter and/or replace the primary fuel filter element (see WP 0127 00).
NOTE
If cause of filter restriction is excessive algae contamination, notify Direct Support Maintenance to drain
and clean fuel tanks and fill with uncontaminated fuel.
0023 00-1
