Nexen BD 933507 - Manual (Page 14)

14 FORM NO. L-20063-AD-0314
This mode combines the Normal Service Mode and the
Normal Spring Engaged Mode. When engaged, air pressure
plumbed into the "Air-Engaged Port" adds to the actuation
force produced by the springs resulting in higher torque and
substantially reduces the life of the brake. Operating in this
manner induces loads that exceed normal design parameters
for the brake, care should be taken when operating with
this configuration.
(Not applicable for the 60 PSI canister)
AIR OPERATED—SPRING ENGAGED MODE
Connect to "Air-Engaged Port"
Brake is cycled with Air-Engaged Mode
Connected to "Spring
Engaged Port"
Quick Exhaust
Power source
wired to "Power
On" circuit.
Regulator
Figure 14
Lubricator
Regulator
Filter
Air Supply
Set at minimum Hold-Off
pressure (75 psi [5.17
bar])
3-Way
Manual
Valve
Power
Source
"ON"
75 psi [5.17 bar] air holds
spring in the disengaged
position. Spring engages
brake in the event of a
power loss.
Air-Engaged Port
Service Service
Plug
Spring-Engaged Port
o
BSolete
t
hree
-P
ort
a
ctuator
Spring Brake
Service
t
wo
-P
ort
a
ctuator
Spring Brake
Air-Engaged Port Spring-Engaged Port
CAUTION
Do not plug both Service Ports.
Install a breather (such as a
muffler) to one of these two ports.
CAUTION
Do not plug Service Port. Install
a breather (such as a muffler) to
the port.
WARNING
Applying the Normal Service Mode and the
Spring Engaged Mode simultaneously is outside
the normal operating range of the BD Caliper
Brake. The loads produced in the Friction
Facings (Item 4), Bearings (Item 14 and 15),
and the machine shaft are up to twice the normal
design loads.