Martin Door DC2500e, Instruction Manual

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FIGURE 44 STEP 17
R
STEP 18
BELT AIL ASSEMBLY TENSION ADJUSTMENT
There should be no need for adjustment
CHECKING TENSION:
Release
ADJUST THE TENSION:
Increase
Decrease
TO SHORTEN BELT ASSEMBLY UP TO 24” (610):
(See exploded view of rail assembly on Page 21)
Loosen
Remove
Slide
Measure
Disassemble
Use
Use
Fasten
Slide
Tension
Your pre-assembled Belt Assembly comes from the factory with the tension adjusted to
factory specifications.
.
trolley from belt connector. The tension nut/washer should be spaced
approximately 1/16" (1.5) from the stationary end-stop arch at the
header end of the rail assembly. See Figure 45.
tension by tightening tension nut clockwise.
tension by loosening tension nut
counterclockwise.
Note: For trained Martin Garage Door Dealers: Consult factory if cut-off is more than 24”
(610) because the position tab must be kept in the proper location.
belt tension as much as possible.
screws from sprocket holder and rail end-stop.
belt and all rail assembly parts out of rail assembly from header end.
and cut off excess rail assembly (1” (25) increments only) from header end.
connector assembly to expose free ends of belt.
the same measurement as the excess rail assembly length and cut the same
amount off both free ends of the belt.
rail assembly end-stop as a guide, mark and drill two 3/16" holes on rail
assembly sides for rail assembly end-stop screws.
both ends of the belt ribs to the connector assembly.
all rail assembly parts into rail assembly from header end according to
original assembly.
the belt following STEP 17.
FIGURE 45
HEADER END OF RAIL ASSEMBLY BELT
TIGHTEN
THIS
DIRECTION
RAIL END-STOP
WRENCH
VIEW FROM BELOW
IMPROPER TENSION - TOO LOOSE
PROPER TENSION
RAIL END-STOP
RAIL END-STOP
RAIL ASSEMBLY
RAIL ASSEMBLY
TENSION NUT
AND WASHER TOO MUCH
SPACE STATIONARY
END-STOP
TENSION NUT
AND WASHER CORRECT
SPACE IS 1/16”(1.5) STATIONARY
END-STOP
HEADER END
HEADER END
COPYRIGHT © 2007 MARTIN DOOR
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