517 Track-Type Skidder Power Train Caterpillar

The track rollers are fastened to the 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 provide equal distribution of the machine's weight along the track.

Machines with a standard track roller frame have seven track rollers, four single flange and three double flange. Machines with a LGP undercarriage have eight rollers, four single flange and four double flange. The following lists are for roller placement. The track rollers are listed in order from the front to the back.

Standard Undercarriage

• No. 1 Single Flange Track Roller

• No. 2 Double Flange Track Roller

• No. 3 Single Flange Track Roller

• No. 4 Double Flange Track Roller

• No. 5 Single Flange Track Roller

• No. 6 Double Flange Track Roller

• No. 7 Single Flange Track Roller

LGP Undercarriage

• No. 1 Single Flange Track Roller

• No. 2 Double Flange Track Roller

• No. 3 Single Flange Track Roller

• No. 4 Double Flange Track Roller

• No. 5 Double Flange Track Roller

• No. 6 Single Flange Track Roller

• No. 7 Double Flange Track Roller

• No. 8 Single Flange Track Roller

Illustration 1	g00426237
Track Roller (The graphic that is shown is a double flange.) (1) Pin. (2) Retainer. (3) Shaft. (4) Track roller. (5) Washer. (6) Duo-Cone seals.

Washers (5) take on the side load on the roller. The amount of side movement or of end clearance of the shaft can not be adjusted.

The track rollers have Duo-Cone seals (6) at both ends of shaft (3) .

Washers (5) take on the side load on the roller. The amount of side movement or of end clearance of the shaft can not be adjusted.

The track rollers have Duo-Cone seals (6) at both ends of shaft (3) .