Drop Stop Device Spring Tension Adjustment - Wayne-Dalton 800 Installation Instructions Manual

DSD (Drop Stop Device) Spring Tension Adjustments
1. Adjust the Drop Stop Device (DSD) spring tension as follows:
- Is spring tension sufficient?
Test engaging of pawl / stator
A. Carefully rotate the rotor until pawl is at the bottom of the stator with the tip of the pawl directly above and behind the front lower notch in the stator, as
shown in Fig 7-E.
B. Push downward on the tip of the pawl with your fingertip until the body of the pawl contacts the stator.
C. Release the pawl. The pawl should rotate upward and contact the flat surface of the rotor.
Adjust
If it does not rotate up far enough to make contact with the rotor, spring tension is too low. Loosen the 5/16"
hex nut and slide the slotted adjustable spring tension clip forward and upward until the pawl will rotate
upward and contact the rotor when released as described in test above.
-Is spring tension excessive?
Test for half-swing with dead weight
D. With the rotor and pawl remaining in the position shown in Fig 7-E. Six standard steel 3/4" bolt washers
(13/16" ID X 2" OD X .145" thick) will make about 10 ounces.
E. The 10 ounce weight should rotate the pawl to the position shown in Fig 7-F.
Adjust
If the pawl is higher than this position, spring tension is too high. Move the spring clip to loosen the spring
until the pawl does lower to align, as shown in Fig 7-F. If, however,
the pawl bottoms on the stator, spring tension is too loose. Move the
clip to stretch the spring until the pawl raises up to align as shown in
Fig 7-F.
Test for full-swing with dead weight
F. With the rotor and pawl remaining in the position shown in Fig 7-F
press down on the pawl until it contacts the stator, as shown in Fig 7-G
G. Release the pawl. The pawl should not return when released but
rather, due to weight of the washers, remain in the stator contact
position.
NOTE: If however the pawl moves up when released, spring tension
is too high. Reduce spring tension as mentioned in prior test. Repeat
test.
When all tests can be conducted with success, that is, without any
adjustments required, the DSD is ready for service.
47
349981 REV2_05/17/2016
Stator
Rotor
Pawl
Headplate
Bracket
Fig 7–E
www.Wayne-Dalton.com
Stator
Rotor
Pawl
Fig 7–D
Stator
Rotor
Nearly
Equal
Pawl
Headplate
Bracket
10oz. Weight
(Including Wire)
Fig 7–F
© Copyright 2016 Wayne Dalton, a division of Overhead Door Corporation
Nearly
Equal