Stanley GR30 User Manual page 15

a. Operating flow of 7–9 GPM / 26–34 LPM
b. At 2000 psi/140 bar pressure
The hydraulic fluid temperature should be at least 80 °F/27 °C for this test. Refer to the Hydraulic System
Requirements section for more information.
3. Make sure the hydraulic power source has a relief valve set at a minimum of 2100 psi/145 bar.
4. Check the tool and hydraulic system for proper operation and performance. If the equipment does not appear
to operate properly, have it serviced before use.
COLD WEATHER OPERATION
Before using the tool in cold weather, preheat the hydraulic fluid by operating the power unit at a low speed. The oil
should be at or above 50 °F/10 °C with a viscosity of 400 SSU/82 cs before operating the tool.
OPEN CENTER/ CLOSED CENTER SETUP (OC/CC) - FIG. 3
This tool can be configured to run on both open center
and closed center systems.
1. Determine your system type.
2. Remove hex plug (78) from spring cap using a 3/16
in. hex.
Using a 3/16 in. Hex, reach through the hole in the
spring cap and turn the selector screw fully clockwise
for closed center systems or counter-clockwise for
open center systems.
3. Reinstall hex plug. Failure to install plug may
introduce contaminants to the spool bore resulting
in replacement of the valve spool and main housing.
To prevent damage to the retaining ring, do not
attempt to force the selector screw counter-clockwise
beyond the point of initial resistance.
OPERATION
Use a hydraulic oil with the recommended
specifications. Using oil that is too thick can damage
the hydraulic system or tool.
Figure 3 - Open Center / Closed Center
GR30 User Manual ◄ 15