203729
Rev. E, 11/20/18
© 2018, THE STANLEY WORKS. ALL RIGHTS RESERVED.
11 of 18
a.
LOOSEN nuts securing the anti-riser wheels to the hanger.
b.
SLIDE the anti-riser wheels upward in the hanger until there is a
1
/
64
-to
1
/
32
-inch gap
between the top of the anti-riser wheels and the bottom of the anti-riser track.
c.
TIGHTEN the nuts securing the anti-riser wheels to the hanger.
3.9
Adjusting Belt Tension
3.9.1
Refer to Figure 8, and facing cover side of header, OPEN doors until "Dimension B"
between short bracket and center of gear reducer drive pulley is 28 inches.
3.9.2
At the center of "Dimension B", HANG an 1
1
/
2
lb. weight (or 12-inch crescent wrench)
from lower portion of belt.
3.9.3
MEASURE "Dimension A" from top of belt to bottom of belt
CAUTION
Over long spans, some belt deflection is required. To prevent damage to bearings and gear reducer, belt
must
not
be over-tightened.
3.9.4
IF "Dimension A" is
not
2
15
/
16
to 3
1
/
16
inches, PERFORM the following:
Figure 8. Adjusting Belt Tension
28"
(SEE DETAIL B)
BELT
LONG
BRACKET
AG016
DIM. A
SHORT
BRACKET
GEAR REDUCER
DRIVE PULLEY
BELT DEFLECTION MEASUREMENT
DETAIL B
2
15
/
16
" TO 3
1
/
16
"
OPTIONAL
GEAR REDUCER
(SEE DETAIL A)
IDLER PULLEY
TENSION
ADJUSTING
SCREW
CLAMP
ANCHOR
DETAIL A
IDLER PULLEY AND BELT
TENSIONING ASSEMBLY
DIM. B
