Use and Care Manual
18 - English
Fig. 20
Fig. 19
Tighten
Loosen
3/8 in. to 
1/2 in.
Base of 
the nut
Edge of 
the brace
Rail 
Edge
CENTER OF RAIL ASSEMBLY
ATTACHING RAIL ASSEMBLY TO POWER 
HEAD
See Figures 22 - 25.
Locate the following items:
  Power Head
  Bracket (2)
  Nut (7/16 in.) [4]
 Sprocket
  Rail Assembly
Place the power head on a towel or the packaging material 
with the light cover facing down. Do not place the unit 
directly on hard surfaces as this may damage the light 
cover and motion sensor.
Fig. 21
Fig. 22
Belt
1/8 in. 
Gap
Sprocket
Round  
Side
Shaft
ADJUSTING THE BELT TENSION
See Figures 18 - 21.
Using a 1/2 in. socket, turn the tension nut clockwise 
to tighten the belt and counter-clockwise to loosen it. 
Adjust the nut until there is approximately 3/8 to 1/2 in. 
of exposed thread showing above it or until the base of 
the nut is aligned with the edge of the brace.
When properly tensioned, there should be about a  
1/8 in. gap between the belt and the edges of the rail near 
the center of the rail assembly.
ASSEMBLY










