English to Portuguese Tech/Engineering Mechanics / Mech Engineering Motors-Shovels

Thrust washers mounted on each side of a roller absorb thrust forces developed between the rollers and side frame during propel steering.
It is supported on the inboard end by a bearing inside the transmission, and on the outboard end by a bearing in the side frame.
The planetary transmission is mounted on the side frame.The side frames, which provide support and control for the crawler track, are attached to the carbody. Shims between the idler bearing blocks and the crawler side frames provide for crawler track adjustment. The front idler roller assemblies maintain alignment of the crawler tracks as they rotate from the top of the side frame to the lower rollers.

The front lower roller is identified to indicate the front of the machine.
Eight lower rollers are pin-mounted at the bottom of each crawler side frame.

side frame - chassi? quadro lateral? estrutura lateral da esteira?