TM-9-2350-256-10
RECOVERY VEHICLE, FULL TRACKED: MEDIUM, M88A1
OPERATOR'S MANUAL
OCTOBER 2014
TM-9-2350-256-10 - Page 492 of 796
THUMPING NOISE AS TRACK PASSES OVER TRACK SUPPORT ROLLERS
SYMPTOM
Thumping noise as track passes over track support rollers.
MALFUNCTION
Dead track link.
CORRECTIVE ACTION
1.
Refer to Preventive Maintenance Checks and Services (PMCS) – After, Including Lubrication
Instructions (WP 0098) for track inspection.
2.
Check for dead track link by driving vehicle slowly forward and watching for a dead link which
will fall below the level of the other links.
3.
Replace dead track link (WP 0106).
4.
Start main engine (WP 0010) and drive vehicle to listen for thumping noise.
5.
If problem exists, notify maintenance.
THUMPING NOISE FROM SUSPENSION SYSTEM
SYMPTOM
Thumping noise from suspension system.
MALFUNCTION
Roadwheel base separation of rubber from metal.
CORRECTIVE ACTION
1.
Check for roadwheels that have base separation of rubber from metal of one half of width of
original contact around entire roadwheel or if damage to roadwheel is enough to cause
thumping during use.
2.
Replace roadwheel (WP 0115) if necessary.
3.
Check for loose, damaged, or leaking shock absorbers. If any shock absorber was found
defective, notify maintenance.
4.
Check track tension and overheated hubs. If overheated hub is suspected, notify maintenance.
5.
Adjust track tension (old configuration) (WP 0109) or (new configuration) (WP 0110)
as necessary.
6.
Start main engine (WP 0010) and drive vehicle to listen for thumping noise.
7.
If thumping noise exists, notify maintenance.
TM 9-2350-256-10
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