COMEUP Industrial Winch (Ver:03) - Manual (Page 5)

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Hydraulic Fluid
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The hydraulic fluid should be a high grade, petroleum based fluid, with rust, oxidation and
wear resistance. Fluid cleanliness and operating viscosity are critical to winch reliability,
efficiency and service lift.
Hydraulic Pump
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To maintain the maximum performance, the hydraulic pump must supply the maximum flow
of hydraulic fluid at the hydraulic pressure stated in specification.
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With a max. oil supply mentioned on the instruction manual at top motor rpm and the pump
must be capable of delivering the operation pressure mentioned on the instruction manual too.
Hydraulic Control Valve
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The control valve must have a four-way spring return to neutral feature, which provides for
open flow from the pressure ports of the winch to the reservoir in neutral position of the
control (motor spool).
Hydraulic Pressure Relief
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The hydraulic system requires a pressure relief set at the operating pressured.
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Failure to use the correct pressure and flow may result in damage to the winch, property or
personal injury.
Hydraulic Reservoir
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The hydraulic reservoir has sufficient capacity to provide good heat dissipation in order to
prevent over-heating of the hydraulic fluid.
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Must be fitted with an oil filler device comprising strainer and filter and a dip stick.The
capacity of the tank should be at least 60 liters.
Over-Center Valve / Counterbalance Valve
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Give smoothly controlled winch out when under load and to provide full dynamic braking.
It must be installed to hold full load.
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The Port A of over-center valve means the inlet port of oil from reservoir and the Port B
meaning the return port of oil to reservoir.
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Over-center valve is a standard accessory for HV winch and counterbalance valve for Bison
winch.
Hydraulic Hoses
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The following hydraulic hoses are recommended for maximum efficiency of the hydraulic
winch. The bigger nominal bore hose, the better winch performance.
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All hose lengths are kept to a minimum because pressure and flow loss is increased as
hose length increases.
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Pressure and return lines in excess of 3.5 meter (11.5”) should be compensated with an
increase in nominal bore size. Motor drain line pipe shall be rated at1/4” BSP N.B.
Inlet line ………….…... 1 1/4” – 1 1/2” nominal bore (N.B.) from reservoir to pump
Return line …………… 1” (N.B.) from control to reservoir
Pressure hoses …....... 1/2” (N.B.) from control valve to over-center valve
Motor drain line pipe… 1/4” BSP N.B.