TM 9-2350-247-34
REPAIR TRACK IDLER ARM Continued
0032 00
Table 1. IDLER ARMS
Reference
Letter
Point of Measurement
New Part Size/Fit
Wear Limit
A
Inside diameter of arm bore
3.185 to 3.188
*
B
Outside diameter of bearing
3.1885 to 3.1925
*
C
Outside diameter of bearing
3.8135 to 3.8175
*
D
Inside diameter of arm bore - inner surface
3.809 to 3.812
*
A-B
Fit of bearing in arm bore
0.0005T to 0.0075T
C-D
Fit of bearing in arm bore
0.0015T to 0.0085T
E
Inside diameter of outer bearing
2.7605 to 2.7765
2.778**
F
Outside diameter of outer spindle
2.750 to 2.752
See Note***
G
Inside diameter of bearings
3.3855 to 3.4015
3.403**
H
Outside diameter of inner spindle surface
3.375 to 3.377
See Note***
E-F
Fit of bearing on spindle
0.001L to 0.026L
G-H
Fit of bearing on spindle
0.000 to 0.025L
I
Outside diameter of outer hub spindle
1.5618 to 1.5623
1.561
J
Outside diameter of inner hub spindle
2.0618 to 2.0623
2.061
K
Outside diameter at track adjuster sleeve
1.495 to 1.500
1.4850
* Must be within new part dimensions.
** Measured in assembly
*** A used idler spindle shall not be put back into service if the nickel plating (0.001 to 0.002 thick) is worn through.
However, a used spindle can be switched to the opposite side of the carrier, which places the load on an unused plated
surface.
0032 00-3