OIL PUMP ASSEMBLY 8M4617 - Caterpillar

BEVEL GEAR AND STEERING CLUTCH
1-Bevel gear shaft. 2-Bevel gear. 3-Coupling assembly. 4-Steering clutch shaft. 5-Steering clutch driving drum. 6-Steering clutch release bearing assembly. 7-Pressure plate assembly. 8-Driving disc. 9-Plate assembly.The steering clutch driven drum encloses the pressure plate assembly, driving discs, plate assemblies and driving drum. Teeth on the outer diameter of each plate assembly mesh with teeth in the driven drum.
DRUM AND FINAL DRIVE
10-Steering clutch driven drum. 11-Final drive pinion flange. 12-Final drive pinion. 13-Final drive gear. 14-Brake band. 15-Final drive hub.The steering clutch driven drum connects to the final drive flange on the final drive pinion. The final drive hub is splined into the sprocket. The sprocket drives the track to propel the tractor.
FINAL DRIVE
10-Steering clutch driven drum. 12-Final drive pinion. 13-Final drive gear 15-Final drive hub. 16-Sprocket. 17-Sprocket shaft. 18-Duo-Cone floating seals. 19-Final drive hub bearing adjusting nut. 20-Final drive support.The bevel gear, bevel gear shaft, steering clutch and final drive pinion rotate as a unit. Disengaging a steering clutch disconnects the drive between the bevel gear shaft and the final drive pinion.The right and left steering clutch levers connect with the hydraulic boost steering clutch release control. A lever is pulled to actuate the hydraulic boost to disengage a steering clutch.Self-energizing band-type brakes supplement the steering clutch to steer the tractor. The brakes are also used to stop the tractor. The parking brake connects with the right brake linkage. Applying the right brake and depressing the parking brake lever engages the pawl with the ratchet.
BRAKE MECHANISM
The arrows indicate the movement of the components when the brake is applied. Components indicated are: 14-Brake band. 21-Lever. 22-Brake adjusting nut. 23-Brake pedal return spring. 24-Parking brake pawl. 25-Parking brake lever. 26-Brake pedal. 27-Rod. 28-Parking brake ratchet. 29-Rod.Hydraulic Steering Booster Control
Each steering clutch lever on the dash panel connects through linkage to valves in the hydraulic steering booster control.
STEERING BOOSTER
1-Lever (to steering clutch release bearing). 2-Piston. 3-Valve. 4-Valve return spring. 5-Oil inlet port.Pressure oil from the transmission oil filter enters the inlet port and flows around the valves. Pulling a steering clutch control lever moves the valve to a position where this oil flows through the center of the valve into the piston. Pressure oil moves the piston. The piston moves the lever linked to the steering clutch release bearing assembly. The movement of the release bearing disengages the steering clutch.When the operator releases the steering clutch control lever, the linkage moves away from the valve in the booster control. The valve return spring moves the valve and piston to the position where oil cannot flow through the valve to the piston. Springs in the steering clutch engage the clutch.When the engine is operating there is a controlled leakage of oil from the valves in the booster control. This oil flows through oil lines to lubricate the bevel gear shaft bearings.Undercarriage
TRACK ROLLER FRAME GROUP
1-Sprocket. 2-Pipelayer frame. 3-Track carrier roller. 4-Front idler. 5-Track roller frame. 6-Track rollers.The undercarriage connects to the chassis and final drive to support machine weight