Nexen BD 933507 - Manual (Page 10)

10 FORM NO. L-20063-AD-0314
Figure 7
Actuator
Ring Clamp Bolt
Ring Clamp
Figure 8
Actuator Ring Clamp
Ring Clamp Bolt
NOTE
Maximum operating pressure is 6.90 bar [100 psi].
Pneumatically actuated devices require clean, pressure
regulated, and lubricated air for maximum performance and
long life. Your Nexen Distributor carries filters, regulators,
and lubricators specifically designed to operate with Nexen
clutches, brakes, and valves.
Piping diagrams are included in this manual for a variety
of braking functions. Refer to OPERATIONAL MODES
(See Page 12-14).
The actuator air connections may be rotated 360 o by
loosening the Ring Clamp and rotating the Actuator Head.
If the actuator is spring engaged, first deactuate the brake
and cage the spring.
1. Apply hold-off air pressure to release the spring Actuator
(See Figure 6).
Note
Before performing step two, determine the actuator type
and select either step 2a or 2b.
o
BSolete
t
hree
-P
ort
a
ctuator
o
nly
2a. Using a 9/16 inch socket wrench, turn the tap
bolt counterclockwise until the brake is released
(approximately 40 turns). Hold-off air pressure can be
removed at this time and service performed.
t
wo
-P
ort
a
ctuator
o
nly
2b. Using a 3/4 inch socket, turn the tap bolt counterclockwise
to fully cage (compress) the spring. The spring is fully
compressed when the bolt is backed out of the unit 21
mm [0.83 inches].
60 PSi a
ctuator
o
nly
2c. The unit can be unscrewed to turn in any direction.
3. Adjust the ring clamp as required.
AIR CONNECTIONS–GENERAL
A Hose Assembly (Item 23) is supplied and must be
connected to the brake with sufficient slack to allow the
Arms (Item 2) full movement without putting stress on the
hose or hose couplings.
Do not use rigid pipe or tubing when connecting
directly to the brake. Care must also be taken
to prevent an unshielded air hose from rubbing
on metal surfaces or edges; this will cause rapid
deterioration of the hose.
WARNING