TM-9-2350-256-34
RECOVERY VEHICLE, FULL TRACKED: MEDIUM, M88A1
TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL
JULY 2005
TM-9-2350-256-34 - Page 113 of 584
TM 9-2350-256-34
0018 00
INTERMEDIATE MAINTENANCE
RECOVERY VEHICLE, FULL TRACKED: MEDIUM, M88A1
NSN 2350-00-122-6826, EIC AQA
AUXILIARY POWER UNIT (APU)
TROUBLESHOOTING PROCEDURE
INITIAL SETUP:
Test Equipment
Cable, ground (item 5, WP 0086 00)
Cable assembly (item 6, WP 0086 00)
Cable assembly (item 7, WP 0086 00)
Hose assembly (item 14, WP 0086 00)
Hose assembly (item 15, WP 0086 00)
Hose assembly (item 16, WP 0086 00)
Hose assembly (item 17, WP 0086 00)
Hose assembly (item 18, WP 0086 00)
Tools and Special Tools
Tool kit, general mechanic’s (item 34, WP 0086 00)
Personnel Required
Mechanics (3)
References
TM 9-2350-256-20
TM 9-2815-221-34&P
WP 0083 00
Troubleshooting Procedure
Auxiliary Power Unit (APU)
Symptom
APU malfunctioning.
Malfunction
Engine fails to crank.
Do steps 1 and 2.
Engine cranks but fails to start.
Do steps 3 thru 5.
Engine hard to start.
Do steps 6 thru 11.
Engine hard to start in cold weather.
Do step 12.
Engine starts but fails to keep running.
Do steps 13 thru 17.
Engine
overheats.
Do
step 18.
Engine misfires, lacks power, or emits black smoke.
Do steps 19 thru 26.
Engine knocks.
Do steps 27 thru 32.
Engine uses excessive oil and emits light blue smoky exhaust.
Do steps 33 and 34.
High air temperature light on APU control box fails to operate properly.
Do step 35.
Low oil pressure light on APU control box fails to operate properly.
Do step 35.
Oil pressure gage fails to operate.
Do step 35.
Battery-generator indicator reads in yellow or lower red region with APU engine running and APU generator
switch on.
Do steps 36 thru 38.
0018 00-1
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