Controlled Products Systems Group 8550C-7 - Manuel (Page 5)

5
2 Tighten the Belt
2.1 By hand, thread the spring trolley nut on the threaded shaft until it is finger tight against
the trolley. Do not use any tools.
Spring Trolley Nut
(To motor unit)
2.2 Insert a flathead screwdriver tip into one of the nut ring slots and brace it firmly against the trolley.
Nut ring
slot
2.3 Tighten the spring trolley nut with an adjustable wrench or a 7/16" open end wrench about a quarter turn until the spring releases and snaps the nut ring against the trolley. This sets the spring to
optimum belt tension.
Nut Ring Nut Ring
AFTER RELEASE
1-1/4"
(3.18 cm)
BEFORE
1"
(2.5 cm)