Ramsey Winch H-800 DOW-LOK (JERR-DAN) - Manual (Page 9)

9
HYDRAULIC SYSTEM REQUIREMENTS
Refer to the performance charts, below, to properly match your hydraulic
system to H-800 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. Flow, gallons per minute (GPM).
Performance based on a motor displacement of 14.9 cubic inches with 30
GPM maximum flow rate. See page 15 for motor port size.
H-800 PERFORMANCE
25,000 LB. DUTY RATING
TYPICAL HYDRAULIC LAYOUT
WORKING PRESSURE, PSI
FIRST LAYER
LINE PULL, LBS
0
0
10000
5000
20000
15000
25000
DYN
AM
IC
STATI
C
2000 1000 3000
FLOW, GPM
FIRST LAYER
LINE SPEED, FPM
0
0
10
5
10
15
20
20 30
30 GPM
2750 PSI
SYSTEM
RELIEF
A PORT
MOTOR CONTROL VALVE
MOTOR
B
A
4 WAY VALVE
(MOTOR SPOOL)
3 POSITION
PRESSURE AT
RATED LOAD:
MAX. FLOW &
PUMP