Hoist Assembly - BRADEN BG4A Installation Maintenance And Service Manual

HOIST ASSEMBLY

1. Place the motor adapter on workbench with the motor
mounting surface down. Install a new O-ring (36). Lubricate
the brake piston seal with petroleum jelly or hydraulic oil and
install on the motor support with the seal lip down, as shown
above.
2. BG4B (current) units with "lobed" brake discs:
Install a steel brake disc (35) into the motor support, fol-
lowed by a friction disc (34). Alternately install steel and
friction discs until eight (8) friction and nine (9) steel discs
have been installed. Finish with a steel disc on top.
BG4A units with splined discs: Install a brake spacer (33)
into the motor support. Insert a steel disc (35) against the
spacer, followed by a friction disc (34). Alternately install
steel and friction discs until eight (8) friction discs and nine
(9) steel discs have been installed. Finish with a steel disc
on top.
NOTE: If motor adapter replacement for a BG4A (early de-
sign) is required for any reason, use the BG4B motor adapt-
er and "lobed" brake discs, and remove the
spacer (33) located at the motor end of the motor adapter.
NOTE: It is good practice to lubricate the discs in gear oil
prior to assembly.
3. Install the other brake plate spacer (33) and the spring
plate (31) as shown.
4. Install the spring locator (28) and the eight (8) springs (27)
into the brake cylinder end plate (2).
5. While holding the motor adapter and brake assembly to-
gether, turn it over and install into the brake cylinder end-
plate. Install the eight (8) capscrews (47) and lockwashers
(48) but do not tighten them completely at the same time.
brake plate
19