Bulldog HW Serie Manuel D'instructions page 11

1.6 System Check (Continued)
Hydraulic Fluid
• 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
• To maintain the maximum performance, the hydraulic pump must supply the maximum flow of
hydraulic fluid at the hydraulic pressure stated in specification.
Hydraulic Control Valve
• 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
• The hydraulic system requires a pressure relief valve set at the operating pressured.
• Failure to use the correct pressure and flow may result in damage to the winch, property or personal
injury.
Hydraulic Reservoir
• The hydraulic reservoir has sufficient capacity to provide good heat dissipation in order to prevent
over-heating of the hydraulic fluid.
• 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
• Give smoothly controlled winch out when under load and to provide full dynamic braking. It must be
installed to hold full load.
• 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.
• Over-center valve is a standard accessory for the HW series winch.
Hydraulic Hoses
• The following hydraulic hoses are recommended for maximum efficiency of the hydraulic winch.
The bigger nominal bore hose, the better winch performance.
• All hose lengths are kept to a minimum because pressure and flow loss is increased as hose length
increases.
• Pressure and return lines in excess of 3.5 meter (11.5 feetv) should be compensated with an in-
crease in nominal bore size. Motor drain line pipe shall be rated at 1/4" 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
CEQUENT
Installation Instructions
PERFORMANCE PRODUCTS, INC. •
™
F3840-00 REV B (4782) 07/15
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