HEAD 2H3053 - Caterpillar

Undercarriage
Undercarriage
(1) Track. (2) Front support. (3) Carrier roller. (4) Rear support. (5) Track rollers. (6) Roller frame. (7) Front idler.The undercarriage connects the frame and steering clutch case to the roller frame. It gives support for the machine weight and is the component that moves the machine along the ground. The two track assemblies are kept in parallel alignment by the rigid connection to the steering clutch case and to the frame. Each track roller frame assembly is in a rigid condition and can not move up and down.The components of the undercarriage are: track roller frames (6), track rollers (5), track carrier rollers (3), front idlers (7), track adjusters, recoil springs and the track (1).The front idlers, track rollers and track carrier rollers use Duo-Cone seals to prevent the loss of lubricant and to keep out foreign material.Track Carrier Rollers
Track Carrier Roller
(1) Shaft. (2) Duo-Cone seal. (3) Roller bearings. (4) Cover. (5) End collar. (6) Carrier roller.The track carrier rollers are used to support the track between the sprocket and the front idler. The carrier roller shaft is held in the roller support bracket by a clamp. The support bracket is fastened to the roller frame.Alignment of the carrier rollers with the sprocket and idler can be accomplished by movement of the roller shaft inside the support bracket. Carrier rollers turn on two tapered roller bearings.Track Rollers
Track Rollers
(1) Collar. (2) Duo-Cone seal. (3) Bearing assembly. (4) Shaft. (5) Thrust washer. (6) Rim assembly.The track rollers are fastened to the track roller frames. The track rollers are in contact with the inside surfaces of the track links. Flanges on the track rollers prevent the movement of the track from side to side. The inside surfaces of the track links cause an even distribution of the weight of the machine along the track.The track rollers have Duo-Cone seals (2) at both ends to seal the lubricant in and the dirt and debris out. The center of shaft (4) is an oil reservoir. The oil is used for lubrication of the bearing surfaces. For roller placement, Refer to D3C, D4C, and D5C Series III Tractor Power Train Specifications, SENR5334.Thrust washers (5) on each end of the roller shaft take the side thrust of the roller. Side movement or end clearance of the shaft can not be adjusted.Front Idlers
D3C and D4C
Front Idler
(1) Plate assembly. (2) Shims. (3) Shaft. (4) Idler. (5) Duo-Cone seal. (6) Track roller frame. (7) Bearing assembly.D5C
Front Idler
(1) Plate assembly. (2) Shims. (3) Shaft. (4) Idler. (5) Duo-Cone seal. (6) Track roller frame. (7) Bearing assembly.The front idlers put the tracks in position in front of the track rollers. They also keep the tracks in alignment with the sprockets.The adjustment of the tracks is done by the movement of the front idlers. The track adjusters move the front idlers and hold them in position.Alignment of the front idler with the track rollers is done with shims (2) between the bearing assemblies and outer plates (1).Each idler turns on