Owner manual

WHEATHEART - POWER SWING MANUAL 2. ASSEMBLY
ELECTRIC AND HYDRAULIC 2.5. HYDRAULIC POWER SWING (OPTION)
30802 R0 19
2.5.1. RELIEF VALVE (FOR CLOSED CENTER ONLY)
In some cases, the control valve will squeal when it is in neutral position. To
correct this, adjust the relief valve:
• Remove the acorn nut and turn the adjusting screw.
• Turning the adjusting screw clockwise will increase the pressure, while
counterclockwise will decrease the pressure (a pressure gauge must be
installed in the inlet line whenever the relief pressure is adjusted).
• Do not back out adjust screw to the point that it falls out.
An adjustable ball spring relief valve is standard on all RD-2500 valves. The
standard factory setting is 1500 psi @ 12 gpm and 1200F.
Other settings can be specified.
Figure 2.13 Hydraulic Valves
WARNING
Over pressure may cause sudden and
unexpected failure of a component in the
hydraulic system, resulting in serious
personal injury. Always use a gauge when
adjusting a relief valve.