Ramsey Winch H 700 DOW-LOK W/ COUNTERBALANCE VALVE, LESS BRAKE - Manual (Page 7)

HYDRAULIC SYSTEM REQUIREMENTS
Refer to the performance charts below to properly match your system to H 700 Dow-lok
®
winch
performance. The charts consist of:
1. Line pull (lb) first layer vs. working pressure (PSI). Static (solid line) refers to hoisting a
suspended load from rest; Dynamic (dotted line) refers to maintaining the motion of a moving
load.
2. Line speed first layer (FPM) vs. Gallons per minute (GPM).
Performance based on a motor displacement of 11.9 cubic inches with 30 GPM maximum flow rate.
See page 13 for motor port size.
PERFORMANCE CHARTS
LINE (SUCTION)
PUMP INLET
RESERVOIR
FLUID
PUMP
(.75 I.D. MINIMUM)
HIGH PRESSURE LINE
CONTROL VALVE
(MOTOR SPOOL OR CYLINDER SPOOL)
4 WAY VALVE
3 POSITION
(1.13 I.D. MINIMUM)
LOW PRESSURE LINE
TYPICAL LAYOUT
DUAL-A & B PORT CONTROL
A
MOTOR
B
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