TM 9-2350-256-20-1
UNIT MAINTENANCE
RECOVERY VEHICLE, FULL TRACKED: MEDIUM, M88A1
NSN 2350-00-122-6826, EIC AQA
TRACKS AND SUSPENSION SYSTEMS THEORY OF OPERATION
Tracks and Suspension Systems
The suspension system on each side of the vehicle consists of six pairs of individually sprung roadwheels (1), three track support
rollers (2), a compensating idler wheel (3), a compensating idler link (4), a track drive hub and sprocket (5), and a track (6).
Figure 1. Tracks and Suspension Systems.
Primary springing is accomplished by individual torsion bars for each roadwheel. Secondary springing is accomplished by dual
volute bumper springs on numbers 1 and 6 roadwheels. Bump stop brackets are welded to the hull over roadwheel numbers 2
through 5 to limit torsion bar windup beyond allowable limits.
Shock absorbers are attached between the first, second, and sixth roadwheel arms and the hull on each side of the vehicle. Each
track consists of 84 rubber shoe assemblies. The individual links are held together by end connectors and wedges, guides, and
guide caps. The guides ride between the dual wheels and through a trough in the track drive sprocket hub to maintain track
alignment.
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