TORSION BAR INSTALLATION:
Ensure that the ceiling fixing points are suitable to accept the weight of the torsion and spring
assembly.
Fix the flat spring anchor brackets to the free ends of the horizontal tracks, Figure 61. Rest the assemble torsion bar on top of the
tracks, then slide one axle end into one bearing and then through the other bearing. Secure the centre bearing plate into a solid
foundation either directly or by the use of suitable steel angle.
Now secure the springs to the spring anchor bracket using 3/8” x 1½” hexagonal head bolts and 3/8” washers and nuts.
Unwind the lifting cable on both sides and thread the cable behind the wheel axles around the ring on the bottom hanger, through
between the pairs of corner brackets around the pulley wheel and over to the rear drums, Figure 61.
Attach the lifting cable to the cable drum by slipping the cable into the slot on the outside groove. (The ferrule will prevent the cable
from coming out). wind the cable by hand turning away from the door in an up and over direction. Once the cable is taut, slide the
cable drum against the end bearing bracket and tighten the 9.5 mm set-screws securely to the torsion bar. be careful not to over-
tighten the set-screws.
Refer to page 28 when adding spring tension.
FIGURE 60
FIGURE 61
NUT 1/4" FLANGED 0T2702
TOP BRACKET LH ASSEMBLY
WASHER
000785
NUT FLANGED
5/16"-UNC 45713
140 mm SHEAVE
PULLEY 0T5251
PLASTIC CURVE OT3170
BOLT SQ NECK
5/16"-UNCx7/8" 0T2714
NUT
3/8"-UNC
006553
BOLT 1/4"x1/2"-UNC 0T2709
SPACER 0T5252
TOP BRACKET LH ASSEMBLY
(parts may differ to those shown)
27
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Installation Instructions
Revision 9 - March 2016