Ramsey Winch SCH-4900 - Manual (Page 5)

TYPICAL LAYOUT
PUMP
(.75 I.D. MINIMUM)
LOW PRESSURE LINE
(.50 I.D. MINIMUM)
HIGH PRESSURE LINE
SEE PERFORMANCE
RATED LOAD:
PRESSURE AT
MAX. FLOW &
(MOTOR SPOOL)
4 WAY VALVE
3 POSITION
RELIEF
SYSTEM
PORT
BRAKE
MOTOR
WITH BRAKE RELEASE SHUTTLE
DUAL-A & B PORT CONTROL
CHARTS BELOW
60
50
40
20
30
L
INE PULL
-F
IRST L
AYER (
L
B.)
L
INE SPEED-
F
IRST LAYER (
F
PM
)
WORKING PRESSURE, PSI
0
0 600
1,000
2,000
1,800 1,200 10
3,000
FLOW (GPM)
5 0 10
SCH 2,900
10 0 5
FLOW (GPM)
4,000
3,000
10 1,200 1,800
2,000
1,000
600 0
0
WORKING PRESSURE, PSI
L
INE SPEED-
F
IRST LAYER (
F
PM
)
L
INE PULL
-F
IRST L
AYER (
L
B.)
30
20
40
50
SCH 3,600
50
40
45
5,000
1,600
15 10 0 5
FLOW (GPM)
4,000
3,000
5
800 1,200
2,000
1,000
400 0
0
WORKING PRESSURE, PSI
L
INE SPEED-
F
IRST LAYER (
F
PM
)
L
INE PULL
-F
IRST L
AYER (
L
B.)
15
10
35
20
25
30
SCH 4,900
9.6 cu.in. Motor 11.9 cu.in. Motor
18.7 cu.in. Motor 3
PERFORMANCE CHARTS
HYDRAULIC SYSTEM REQUIREMENTS
Refer to the performance charts below to properly match your hydraulic system to the winch performance. The
charts consist of: (1) first layer line pull (LB) vs. working pressure (PSI) and (2) first layer line speed (FPM) vs. flow
(GPM). A motor spool directional control valve is required.