TM-9-2520-238-34
M113A1 FOV, M113A2 FOV, M548 AND M548A1
TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL; RIGHT ANGLE DRIVE, COOLING FAN; GEARCASE, TRANSFER; DRIVE ASSEMBLY, FINAL; DIFFERENTIAL, STEERING CONTROL; BRAKE, SINGLE DISK; CYLINDER ASSEMBLY, HYDRAULIC BRAKE
TM-9-2520-238-34 - Page 32 of 319
TM 9-2520-238-34
INTRODUCTION TO HOW TO USE TROUBLESHOOTING—Continued
0004 00
Finding the Right Troubleshooting Procedure
A component arrives at the shop. The DA form 2404 shows that the differential makes excessive noise or vibrates while
moving. Therefore, you look up differential makes excessive noise or vibrates while moving will be listed in Malfunction/
Symptom Index, (WP 0005 00), in this chapter.
TM 9-2520-238-34
MALFUNCTION/SYMPTOM INDEX WP
0005 00
COOLING SYSTEM
TRANSFER GEARCASE
FINAL DRIVE ASSEMBLIES
REAR AXLE
COOLING FAN RIGHT ANGLE DRIVE LEAKS OIL.
.........................................................................
WP 0006 00
COOLING FAN RIGHT ANGLE DRIVE BINDS OR MAKES GRINDING
NOISE.
..............................................................................................................................................
WP 0007 00
TRANSFER GEARCASE LEAKS OIL.
..............................................................................................
WP 0008 00
FINAL DRIVE BINDS OF MAKES GRINDING NOISE.
.....................................................................
WP 0011 00
FINAL DRIVE LEAKS OIL.
.................................................................................................................
WP 0012 00
FINAL DRIVE HAS WATER INSIDE.
.................................................................................................
WP 0013 00
DIFFERENTIAL MAKES EXCESSIVE NOISE OR VIBRATES WHILE
TURNING.
..........................................................................................................................................
WP 0009 00
DIFFERENTIAL MAKES EXCESSIVE NOISE OR VIBRATES WHILE
MOVING.
...........................................................................................................................................
WP 0010 00
This is the procedure you want.
TM 9-2520-238-34
DIFFERENTIAL MAKES EXCESSIVE NOISE OR VIBRATES WHILE MOVING
0010 00
INITIAL SETUP:
Maintenance Level
Direct/General Support
Tools and Special Tools
General mechanic’s tool kit (WP 0034 00, Item 37)
Personnel Required
Track Vehicle Repairer
References
See your-20
Equipment Condition
Differential removed from carrier (See your -20)
Disassemble for inspection per repair differential right
angle gearbox (WP 0029 00)
Repair output shaft assemblies (WP 0025 00)
T
TN
NO
NO
NO
NO
YN
2YN
3YN
4YN
NO
Y
2Y
3Y
4Y
YES
YES
YES
YES
YES
1. Inspect bevel gear backlash to see if it has been adjusted.
2. Has bevel gear backlash been adjusted?
1. Inspect shaft gear bearing to see if it has been adjusted.
2. Has shaft gear bearing been adjusted?
1. Inspect shaft gear bearings for damage.
2. Are shaft gear bearings undamaged?
1. Inspect bevel gear shaft bearings (WP 0029 00).
2. Are bevel gear teeth undamaged?
1. Inspect output shaft bearings.
2. Are output shaft bearings serviceable?
1. Adjust bevel gear backlash
(WP 0029 00).
2. Verify no faults found.
1. Adjust shaft gear bearing
(WP 0029 00).
2. Verify no faults found.
1. Replace damaged bevel gear shaft
bearing (WP 0029 00).
2. Verify no faults found.
1. Replace damaged shaft gear
bearings (WP 0029 00).
2. Verify no faults found.
1. Replace output shaft bearings
(WP 0025 00).
2. Verify no faults found.
0010 00-1
0004 00-3
Back to Top
