20
REPLACEMENT PROCEDURES—COUNTERWEIGHT STRAP REPLACEMENT
9. Remove and save the screw securing the strap to
the drum spool. (See Figure 49)
A counterweight can weigh in excess of
100 pounds. Make sure that safe handling
procedures are followed and that each
counterweight is securely supported dur-
ing the following procedure. If not handled
properly, a counterweight can damage door
components and cause serious personal
injury.
7. Remove the tape wrapped around the loose end of
the strap. (See Figure 47)
Drum
Spool
Flat-Head
Screw
Tape
A8500118
Figure 49
Counterweight
Strap
Clamp
Bars
10. Attach the new strap to the drum spool in the same
manner as the old strap using the saved screw.
(See Figure 49)
A8500089
Figure 47
The door must be in the fully open position
before the strap can be installed. Also, the
strap must be installed with three initial
wraps around the spool and it must hang
8. Loosen the serrated-flange hex screws to release
the clamp bars that secure the strap to the counter-
weight. (See Figure 48)
Serrated-Flange
Hex Screws
off the front of the spool.
11. Wrap the strap around the spool three times. The
strap must hang off the front of the spool.
(See Figure 50)
12. Route the strap over to, and behind, the idler pulley.
The strap must hang off the back of the pulley.
Clamp
Bars
Counterweight
Strap
Front Side
of Drum Spool
Back Side
of Idler Pulley
Counterweight
Counterweight
Strap
Counterweight
A8500116
Figure 48
A8500115
Figure 50
