Ramsey Winch RPH-50000 SHORT DRUM W/AIR TENSIONER & 2-SPEED MOTOR - Manual (Page 5)

3
HYDRAULIC SYSTEM REQUIREMENTS
Refer to the performance charts, below, to properly match your hydraulic sys-
tem to RPH 50000 winch performance. The charts consist of :
(1) Line pull (lb.) first layer vs. working pressure (PSI) and
(2) Line speed, first layer (FPM) vs. Flow (GPM). Performance based on a
motor displacement of 9.6 cubic inches with 25 GPM maximum flow
rate.
CAUTION: SYSTEM BACK PRESSURE MUST NO EXCEED 50 PSI OR
BRAKE SHAFT FAILURE CAN OCCUR. IF BACK PRESSURE EXCEEDS
50 PSI, AND CANNOT BE REDUCED, AN EXTERNAL CASE DRAIN
SHOULD BE RUN FROM THE MOTOR CASE DRAIN PORT (SEE
PAGES 20-21) TO TANK OR A LINE/CONNECTION THAT HAS A
PRESSURE BELOW 50 PSI. THE DRAIN LINE MUST BE ROUTED SO
CARTRIDGE
ALTERNATE
(A ROTATION SHOWN)
FOR B ROTATION
LOCATION
MOTOR
BRAKE
PORT
B
TYPICAL LAYOUT
WITH BRAKE RELEASE SHUTTLE
SINGLE (A OR B) PORT CONTROL
3 POSITION
4 WAY VALVE
(MOTOR SPOOL)
SYSTEM
RELIEF
PUMP
EXTERNAL
OPTIONAL
LINE
CASE DRAIN