PUMP GP-FUEL INJ 20R4737 - Caterpillar

Brake Control Linkage (View from right side)
(1) Spring. (2) Rod. (3) Steering lever. (4) Parking brake lever. (5) Pedal. (6) Rod. (7) Nut assembly. (8) Lever. (9) Rod. (10) Lever. (11) Lever. (12) Band assembly (brake band).Two band-type brakes, one on each steering clutch drum, are used to stop the tractor and give assistance to the action of the steering clutch. The operation of each brake is separate from the other.The operation of both brakes is the same. When lever (3) is pulled to the rear, rod (6) moves rod (2). Rod (2) moves levers (8 and 10) and rod (9). Rod (9) moves lever (11) which causes brake band (12) to make contact with the steering clutch outer drum to slow or stop the machine and give assistance to the steering of the machine.When the lever is released, spring (1) returns the lever to its original position.Adjusting screw (7) is used to adjust the lever free travel. See D4B, D4C And D4C Series II Tractor Power Train Specifications, SENR3544 for the correct adjustment procedure.Parking Brake Operation
The parking brake engages both the left and right brakes. To engage the parking brakes, you must move parking brake lever (4) down, then push the brake pedal forward until the pedal stops moving.To release the parking brake, move parking brake lever (4) up and push the brake pedal forward. The pedal will return to its original position.Undercarriage
Undercarriage
(1) Track (2) Rear support (3) Carrier roller (4) Front 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
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 Carrier Roller
(1) Shaft (2) Duo-Cone seal (3) Roller bearings (4) Cover (5) End collar (6) Carrier roller Track Rollers
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