TM 9-2320-280-20-2
8-18. IDLER ARM MAINTENANCE (Cont’d)
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
8-56
NOTE
Set front wheels in a straight ahead position.
Check idler arm (5) for visible damage, such as breaks and cracks. If damaged, replace idler arm (5).
Check capscrews (4) for looseness of idler arm bracket (3) on frame (6). Tighten capscrews (4) if
loose.
NOTE
A flat steelplate or piece of scrap metal is required for step 3.
Secure a flat steelplate or piece of scrap metal to front crossmember (2).
Pull center link (1) downward to seat ball and socket of idler arm (5).
Using flat surface on center link (1) as a guide, mark first reference line on steelplate or scrap metal,
as shown in figure A.
Position spring scale (7) on center link (1) and pull in an upward direction to obtain a 25 lb (11Kg)
reading on spring scale (7).
NOTE
Maintain 25 lb (11 Kg) reading on spring scale (7) to perform
step 7.
Using flat surface on center link (1) as a guide, mark second reference line on steel plate or scrap
metal, as shown in figure B.
Remove spring scale (7) from center link (1).
Remove clamp and steelplate or scrap metal from front crossmember (2).
Measure distance between first and second reference line on steel plate or scrap metal. If
measurement exceeds 0.25 inch (6mm), replace idler arm (5).
