Nexen BD 933507 - Manual (Page 7)

7 FORM NO. L-20063-AD-0314
Figure 3
16
16
3
6
1
24 2
24
7
7
The actuator can be mounted on either side of the brake.
1. Pull Shoe Pins (Item 16) up and out (See Figure 3).
2. Remove Shoes (Item 3) (See Figure 3).
3. Remove the 4 Cap Screws (Item 24) (See Figure 3).
4. Remove the Pivot Pin Retainer Plate (Item 6) (See
Figure 3).
5. Press the Pivot Pins out (Item 7) (See Figure 3).
6. Slide Arms (Item 2) out of Main Frame (Item 1) (See
Figure 3).
7. Position Arms and Actuator as desired.
8. Reverse the above procedure to reassemble the BD
Caliper Brake.
9. Tighten the Cap Screws (Item 24) to 7-9 Nm [5-7
ft-lb] torque.
NOTE:
On spring engaged BD Caliper Brakes, apply hold-off air
pressure and:
Obsolete Three-Port Actuator Only
Using a 9/16 inch socket, turn the top bolt clockwise until it
bottoms out (approximately 40 turns), then torque the Tap Bolt
to 13.5-20.2 Nm [10-15 ft-lb].
Two-Port Actuator Only
Using a 3/4 inch socket, turn the tap bolt clockwise to fully uncage
(decompress the spring. The spring is fully decompressed when
the hex bolt head is flush against the actuator.
60 PSI Actuator Only
Using a 15/16 inch socket, turn the manual release bolt
counterclockwise (Approximately 12 turns) to fully uncage the
spring.
Caution: Do not completely unscrew the bolt from the unit or
the manual release mechanism will be disabled.
ACTUATOR
WARNING
Spring actuated brakes must be manually released prior to brake disassembly.
o
BSolete
t
hree
-P
ort
a
ctuator
Apply hold-off air pressure to remove tension on the Tap Bolt and use a 9/16 inch socket wrench to turn the Tap Bolt
counterclockwise until the brake is released (approximately forty turns).
t
wo
-P
ort
a
ctuator
Apply hold off pressure to remove tension on the Tap Bolt and use a 3/4 inch socket wrench to 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 in].
60 PSi a
ctuator
Apply hold off pressure to remove tension on the manual release Bolt and use a 15/16 inch socket wrench to turn the Tap
Bolt clockwise to fully cage (compress) the spring. The spring is fully compressed when the bolt is tightened until snug.
Hold-off air pressure can be removed at this time, and service performed (See Figure 2a).
Tap Bolt
located under
Breather Cap
Figure 2a Obsolete Three-Port Actuator
Figure 2b Two-Port Actuator
3/4" Hex
Head
Figure 2c 60 PSI Actuator
15/16" Hex
Head
WARNING