MUFFLER 9Q7383 - Caterpillar

Illustration 1 g06042012
Rear Left Undercarriage
(1) Track frame
(2) Front idler
(3) Chain
(4) Pressure tap
(5) Track rollers
(6) Drive sprocket
(7) Final drive unit
(8) Track shoeThe machine is equipped with four legs. Each leg is equipped with an undercarriage group. The rotating components of each undercarriage group include the following:
One front idler (2)
Four track rollers (5)
One single-piece drive sprocket (6), which is mounted to the final drive (7)The track group is made up of 24 padded track shoes (8) that are mounted to the drive chain assembly. The drive chain assembly consists of two chains (3). These chains are joined with pins and bushings through a compression fit.Front idler (2) and track rollers (5) ride on the rails of chains (3). Drive sprocket (6) rides on the bushing that connects the chains together.Each undercarriage group is equipped with a track tension cylinder. The tension cylinders are mounted between track frame (1) and the front idler shaft. The auxiliary hydraulic pump provides the oil for the track tension cylinders. The cutter box valve contains valves to control the pressure in the track tension cylinder. Each track tension cylinder is equipped with pressure tap (4). These taps can be used to measure track tension pressure.Each undercarriage group is equipped with a single-speed, planetary final drive unit (7). The final drive units contain the parking brakes. These brakes are spring applied and hydraulically released. Charge oil is used to release the brakes. The housing of the final drive contains gear oil. The planetary gears are splash lubricated.