Hydraulic Systems; Typical Hydraulic Layout; Control Valve; Performance Charts - RAMSEY WINCH DOW-LOK 800 Serie Manuel Du Propriétaire

HYDRAULIC SYSTEMS

Refer to the performance charts, below, to properly match your hydraulic system to the H-800 Series winch perform-
ance. The charts consist of:
1. Line speed, first layer (FPM) vs. Flow, (GPM) and
2. Line pull (lbs.) 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.
Performance based on a motor displacement of 14.9 cubic inches with 30 GPM maximum flowrate. See page 15 for
motor port size.
H-800, HY-800 Series Performance: 20,000 lb. Duty Rating 40:1 Gear Ratio
20,000
18,000
16,000
14,000
12,000
10,000
8,000
6,000
0 1000
WORKING PRESSURE, PSI

TYPICAL HYDRAULIC LAYOUT

CONTROL VALVE

3 POSITION 4 WAY
CYLINDER SPOOL
PUMP INLET LINE
PUMP
RELIEF VALVE
FLUID
RESERVOIR
LOW PRESSURE LINES
2000 3000
FLUID FILTER
20
15
10
5
0
0 10
FLOW, GPM
HIGH PRESSURE LINES
(.88 I.D. MINIMUM)
HYDRAULIC
WINCH MOTOR
LOW PRESSURE LINES
(1.31 I.D. MINIMUM)
5
20 30