CARTRIDGE GP -A 10R0449 - Caterpillar

Description of Winch
The winch assembly consists of six basic component groups:1. Winch case2. Hydraulic motor and piping3. Brake housing assembly4. Cable drum5. Planetary reduction group6. Carrier clutch groupThe winch case is a structural member of welded construction designed specifically for use in tractor winch applications. The case supports the output ring gear and the brake housing assembly. The cable drum rotates on two large tapered roller bearings. The hydraulic motor is bolted to the brake housing, which also supports the right hand cable drum bearings. The output ring gear supports the left hand cable drum bearings.The planetary reduction group contains three planetary gear sets driven by the primary sun gear shaft, which is coupled to the motor shaft by the inner race of the overrunning brake clutch assembly. With a total reduction of 212:1 or 255:1, the planetary reduction group greatly multiplies the motor torque for high line pulls at maximum efficiency and precise load control.Basic Winch Operation
The CARCO H90VS winch contains a hydraulic motor and gear ratio specifically selected to match the winch to the hydraulic power of the specific tractor. This allows the winch to maximize the available hydraulic horsepower.The winch motor is operated utilizing the full flow of the tractor implement pump via the implement valve, which also controls both the blade and ripper. The ripper section of the implement valve may be used to operate the winch, or in some instances, it may be replaced with a special winch valve to enhance the winch performance capabilities. In any case, the valve used will be a four way, three position valve.Typically, the winch control valve is connected to the operator's joystick control lever by a series hydraulic hoses. Movement of the control lever directs the oil flow to the winch motor through hydraulic lines. The hydraulic motor converts the flow and pressure of the hydraulic system into the mechanical energy needed to drive the winch gear train.The tractor can walk away from a winch load to reposition for another pull by releasing the drum clutch. The spring applied, hydraulically released multi-disc clutch locks the clutch carrier to the secondary sun gear through the gear adapter. When released, clearance between the clutch plates allows the secondary sun gear to rotate free of the clutch carrier, so the winch drum is disengaged from the winch static brake. The cable drum drag observed during brake-off (drum clutch release) is caused by the rotating output and secondary planetary gear sets and viscous drag of the friction discs. The brake-off drag force increases as the tractor ground speed increases.Dual Brake System-Description
The dual brake system consists of a dynamic brake system and a static brake system. The dynamic brake system has two operating components:1. Hydraulic Brake valve assembly2. Hydraulic motorThe brake valve is similar to a counter-balance valve. It contains a check valve to allow free flow of oil to the motor in the Reel-In direction and a pilot-operated, spring-load spool valve which blocks the flow of oil out of the