Section 7 – Maintenance
33
Applying Spring Turns
1. Start with door in open position and refer to the job information for the number of spring turns required
on the unit in the open position.
2. To apply spring torque, remove cotter and stop pin from adjusting wheel.
3. Using two tensioning bars apply spring torque by inserting both bars into adjustor wheel one above the
other.
4. Rotate wheel in a direction of raising the curtain. Maintain applied torque with upper bar, while
removing lower bar. RE-insert this bar above the other and continue applying torque one notch at a
time using this hand over hand procedure until the specified number of spring turns has been applied.
5. Replace stop pin into adjustor wheel and insert the cotter pin to hold it in place.
6. The spring will not hold the door in the open position. Ensure that the motor brake or safety pin is
engaged prior to removing any devices applied to hold the door in the open position (clamps, slings,
etc.).
7. Final spring torque adjustment, if necessary, should be increased or decreased with the curtain in
the fully open position.
8. Remove cotter pin and stop pin from adjustor wheel and begin to increase or decrease torque.
•
To increase torque, rotate the wheel in the direction of raising the curtain.
•
To decrease torque, carefully rotate the wheel in the direction of lowering the curtain.
Note:
If you have difficulty balancing the door, or the number of turns required to balance the
door varies significantly from the quantity provided, contact the
Service Department
.
