HYDRAULIC CONNECTIONS Hydraulic Winches: General Information
FIRST TIME OPERATING INSTRUCTIONS
Brake System
Freespool Clutch Operation
WARNING Never exceed the maximum recommended hydraulic pressure or flow for any of the components used. WARNING Always use a tandem-center type control valve ( A & B work ports blocked) to insure proper brake operation. WARNING Always make sure all hydraulic system components are functioning correctly. WARNING Never use a standard motor valve. WARNING Always connect the winch to the hydraulic system as shown in the hydraulic schematic. NOTE: The hydraulic system diagram and component descriptions are provided for general reference. Consult a knowledgeable hydraulics representative for specific recommendations on component selection, interconnection, layout, and best practice. The pressure rating of the winch motor is determined by (a) the maximum allowable pressure at the motor inlet port and (b) the maximum allowable pressure drop across the motor. Pressure drop is defined as the difference between the inlet port pressure and the outlet port pressure at the winch motor. Exceeding the maximum inlet pressure may damage the winch motor. Exceeding the maximum pressure drop may cause failure of winch components.
WARN Series XL winches are equipped with a 2-part hydraulic braking system. 1 Dual counterbalance valves mounted to the winch motor provide dynamic braking to control the load when it is moving (i.e. power out function). 2 A spring applied hydraulically released (SAHR) disc brake prevents movement of the winch drum and load when the winch is stopped (i.e. control valve OFF position).
The recommended operating temperature range of the hydraulic motor is 100°F to 150°F (38°C to 66°C). The maximum operating temperature range is -6°F to 180°F (-21°C to 82°C). Do NOT exceed the flow rating of the hydraulic motor. See the product data sheet for specific hydraulic specifications. HYDRAULIC FLUID: The hydraulic fluid used with the winch must be an extreme pressure, anti-wear hydraulic oil with oxidation and corrosion inhibitors. It must contain a foam suppressant, and have a viscosity rating of 100-300 SUS at 60°F to 115°F (15°C to 46°C). The recommended nominal filtration level is 10 microns or finer.
WARNING Always ensure the clutch is fully engaged before operating the winch. WARNING Never engage or disengage clutch if winch is under load, winch rope is in tension or drum is moving. WARNING Never operate the winch motor for a prolonged period while the clutch is in freespool mode. WARNING Never exceed 120 psi air pressure. WARNING Never use oil or other liquids to operate the air clutch. WARN Series XL winches are equipped with either a manual or air operated freespool clutch depending on the model. The freespool clutch allows the operator to rapidly spool out the winch rope. The freespool clutch disconnects the winch drum from the winch brake. MANUAL CLUTCH OPERATION The manual freespool clutch is operated by depressing the detent latch and turning the clutch lever as indicated on the winch label. AIR CLUTCH OPERATION The air freespool clutch is operated by application of air pressure to the fitting supplied on the winch gearbox housing. The fitting is designed to accept ¼” rigid plastic tubing.
Both braking components are designed to operate in either direction, which allows flexibility in the rope winding direction.
Never attempt to adjust or remove the Counterbalance Valves installed in the winch hydraulic manifold.
In order for the brake system to function properly, the winch must be connected to the proper system Control Valve. The Control Valve must be a 3-position, 4-way, spring return valve as shown in the Hydraulic Schematic. The Control Valve and hydraulic plumbing must allow both motor ports (Port A and Port B) to drain freely to the hydraulic system reservoir in the center (OFF) position. Hydraulic system back pressure (return line pressure) must not exceed 100 psi. Use of the incorrect control valve or plumbing may cause failure of the brake system.
1. To release the clutch (freespool operation): Apply 50-120 psi air pressure to the air fitting.
2. To engage the clutch (winch operation): Remove air pressure (0 psi) from the air f itting.
WARN INDUSTRIES 10
WARN INDUSTRIES 11
Powered by FlippingBook