Rockford Systems, LLC
30
Call: 1-800-922-7533
SECTION 3—INSTALLATION OF COMPONENTS
SSC-1500 Gen II Part-Revolution Solid-State Control
Air Pressure Switch
(If furnished—See enclosed Manual KSL-165)
The clutch/brake air supply must be monitored by an air pressure switch on all part-revolution press brakes. If an
air counterbalance is used, it must also be monitored by a separate air pressure switch. Please check the machine
owner’s manual for the minimum suggested air pressure for these switches.
Mount this switch at any convenient location on the machine. Electrical and pneumatic connections to the switch are
required; therefore, its location is determined by the installer. Flexible hose is often used for air connections. Since
only air pressure is being monitored, tubing size can be small and length is not critical. The switch is set to open the
electrical circuit any time pressure falls below the preset level. It is normally set in the 30 to 40 PSI range to prevent
unnecessary opening due to a surge in line pressure during the clutch engaging period. The minimum setting for
the air counterbalance pressure may be in the 20 to 30 PSI range (see machine manufacturer’s recommendations).
Check Valve for Counterbalance System
(If furnished—See enclosed Manual KSL-038)
If the machine is equipped with an air counterbalance system, a check valve is required by OSHA to prevent a sudden
loss of air pressure to the system. This valve is available in various sizes. The size is determined by the pipe size of the
incoming air supply to the air tank, which supplies the air to the counterbalance system. The valve should be installed
in the air line just before the tank. When complete energy isolation is required, for maintenance on the machine or
counterbalance system, be sure that air is released from the counterbalance, cylinders, tank, etc.
Do not install this valve between the cylinders and tank.
Photo 3.35
Part No. CTD-062
CAUTION
Yoke Pin
Drive Yoke
Yoke Locknut
Cylinder
Return
Spring
Air
Cylinder
Mounting
Feet
Hose to
Solenoid
Valve
Cylinder
Inlet Port
Figure 3.5
Standard Pull Cylinder With Clevis
Mount on Right Side of Press Brake
Standard and Special Air Cylinders
(continued)
Photo 3.36
Part No. RCD-061—
1
⁄
2
”
Part No. RCD-062—
3
⁄
4
”
Part No. RCD-063—1”
Part No. RCD-064—1
1
⁄
2
”
Part No. RCD-065—2”
Provide loose ring guide in either of these
areas if necessary to limit cylinder side-
to-side motion
Existing Linkage and
Return Spring