Nexen BD 933507 - Manual (Page 5)

5 FORM NO. L-20063-AD-0314
INTRODUCTION
BEFORE YOU BEGIN
Nexen has introduced a new actuator for BD Caliper Brake spring-engaged models. The old Three-Port Actuator is
obsolete.
The new two actuator is geometrically different and the manual disengagement mechanism operates differently. The new
actuator for the 60 psi release unit is unique in look from the new two port actuator.
The redesigned two-port model has a rubber hose on the exterior of the product used for balancing internal air pressure.
The service and spring ports for this model have been redesigned and simplified.
The mounting procedures on both actuators are identical.
Review the summary of actuator differences below before beginning any installation or maintenance procedures.
NOTE
The installation and maintenance procedures for each model are located next to each other in this manual. Be
sure to follow the appropriate instructions for each model.
S
ummary of
D
ifferenceS in
BD a
ctuatorS
Read this manual carefully, making full use of its explanations and instructions. The "Know How" of safe, continuous, trouble-free
operation depends on the degree of your understanding of the system and your willingness to keep all components in proper
operating condition. Pay particular attention to all NOTES, CAUTIONS, and WARNINGS to avoid the risk of personal injury or
property damage. It is important to understand that these NOTES, CAUTIONS, and WARNINGS are not exhaustive. Nexen
cannot possibly know or evaluate all conceivable methods in which service may be performed, or of the possible hazardous
consequences of each method.
Accordingly, anyone who uses a procedure that is not recommended by Nexen must first satisfy themselves that neither their
safety or the safety of the product will be jeopardized by the service method selected.
Obsolete 3 Port Actuator 2 Port Actuator 60 PSI Release Actuator
Overall Length 214 mm [8.41 in] 169 mm [6.67 in] 165 mm [6.5 in
Diameter 160 mm [6.31 in] 163 mm [6.44 in] 184.2 mm [7.25 in]
Clamping Force Refer to catalog data 5% greater Refer to catalog
Hold-Off Pressure 4.96 bar [72 psi] 5.10 bar [74 psi] 4.1 bar [60 psi]
Power Spring Telescoping Non-coil clash Multiple coil
Ports
One spring release
and two plugged ports
One spring release
and one plugged port
One spring release
and one vent port
CAUTION
The user(s) of this equipment must comply with
operating procedures and training of operating
personnel as stated in the Occupational Safety
and Health Act (OSHA) Standard (29 CFR 1910)
Section 1910.219-K.