MIL-DTL-11891G(AT)
APPENDIX D
TABLE X. T157I track hardware inspection and replacement criteria.
ITEM
ACTIVITY
INSPECTION OR ACTION
Track strand
1. Inspect daily.
Visual observation of overall condition with
specific attention to the road/grouser interface.
2. Replace.
When 20% of the original track shoes have
been replaced (or now require replacement due
to wearout).
Track pin
1. Inspect daily.
Visually check for cracked, broken or bent
pins.
2. Replace shoe*.
When pin broken, bent or cracked.
Bushing
1. Inspect daily.
Visually check for dead blocks or extruded
bushing.
When dead blocks are found or a bushing is
2. Replace shoe*.
completely extruded (pin to shoe body
contact).
1. Inspect daily.
Visually check for (1) cracks, chunks, or cuts.
Roadwheel
path rubber
(2) Obvious lack of roadwheel support due to
blowout or chunking.
2. Replace shoe*.
When more than 50% of rubber is lost.
Track shoe
1. Inspect daily.
Visually check for cracked shoes, crushed
body
binocular tubes, and loose or lost backing
rubber.
When shoe body cracked, binocular tube
2. Replace.
crushed, or pad mounting hole enlarged, or
unable to remove defective pad.
Center guide
1. Inspect daily.
Visually check for cracked, broken, bent, loose
or worn center guides.
When missing, cracked, broken or worn to less
2. Replace shoe*.
than 3/8 inch thick as measured 1 inch below
top to the center guide.
Track pad
See D.3.20 and D.3.21.
*NOTE: Pads from original shoe must be removed and reinstalled on the replacement shoe.
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