Quantcast Table A- 4. Truck side frame and bolster gib wear limits

 

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See Figure A-22, Bolster gibs and side frame wear plates.
Figure A-22. Example of a bolster gib and side frame wear plate.
Table A- 4. Truck side frame and bolster gib wear limits.
When wheels are changed or trucks dismantled, wear on truck side frame columns and bolster
gibs must be measured before disassembly and when wear exceeds limits shown below, same must
be repaired.
Repair when total
Repair to these nominal clearance
Type of Truck
clearance between
dimensions between bolster and
bolster and truck side
truck side frame:
frame columns reaches:
Lateral
Lateral
Longitudinal
Total
Longitudinal
Inside
Outside
Plain bearing trucks WITHOUT
1 1/8"
1/8"
1/8"
3/16"
"
built-in features...................
Trucks WITH built-in snubbing
features having plain bearings (all
bearing sizes) or having roller
bearingss which provide bearing
lateral (all bearing sizes) or
having 5"x 9" or 5 " x 10"
roller bearings which provide no
bearing lateral......................
1 1/8"
"
*
*
Trucks WITH built-in snubbing
features having 6" x 11", 6 x
"
12" or 7" x 12" roller bearings
which provide no bearing lateral
1
"
"
*
*
"
*
Longitudinal clearances are primarily a matter of wear of frame or bolster column wear plates,
friction shoes and bolster column surfaces. See maintenance instructions from truck designer or
manufacturer.
A - 24


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