TUBE ASSEM. 7P8735 - Caterpillar

Cleanliness around all hydraulic components is of utmost importance. Before starting any repair procedures, be sure to thoroughly clean the parts to be removed, as well as adjacent areas on the tractor, to avoid entry of dirt into the winch and winch control system. Do not leave any ports or access openings exposed to the weather. Seal or cap the openings to prevent entry of dust, moisture, or other foreign material. Cap or plug all exposed hydraulic ports and fittings.During disassembly, care should be taken not to damage seals and O-rings that are to be reused. Replace any such parts that are damaged or otherwise defective. Certain O-rings and seals specified in the replacement instructions must not be reused. In general, seals and O-rings that work under full operating hydraulic pressures, or that require extensive disassembly to access, should be replaced with new parts at the time of reassembly.Winch Removal
Place the tractor and winch in a level position and drain the oil from the winch into a suitable container. Install the drain plug securely after the oil has drained completely. Due to the configuration of the cable drum, a small amount of oil may remain in the drum cavity.Remove the RH side motor cover. On tractors with the winch control valve mounted on the winch and not in section of the tractor hydraulic valve stack, remove the hoses from the tractor hydraulics to the valve. Remove the winch motor hoses from the motor and brake valve. Remove the motor shift hose from the motor "X" port. Remove the motor case drain hose from the motor. Remove the drum clutch releases hose from the fitting at the drum clutch port, located below the motor.Support the winch with a suitable hoist or platform, and remove the fasteners securing the winch to the tractor mounting brackets, then carefully move the winch away from the tractor.Winch Installation
Remove dirt, paint and rust from the mounting surfaces of the winch and tractor mounting brackets.Align the winch mounting holes with the holes in the mounting brackets, and install and tighten all fasteners to the recommended torque. Refer to the winch parts and installation guide.Fill the winch to the proper level with the recommended oil. Allow 15 minutes for the oil to flow through the gear train and fill the drum cavity before checking the oil level. It may be necessary to fill the motor case with hydraulic oil before start-up to protect against motor failure due to starting dry.Start the tractor engine and operate the engine at low RPM. Alternately place the winch control in the REEL-IN and REEL-OUT positions until the winch motor hydraulic circuit is filled with oil and the winch operates smoothly. Check the tractor hydraulic oil reservoir level and fill as required.