Mueller Roll-Up Door L250 User Manual
Page 14
14
877-2-MUeLLeR
step 14: DooR MaintenanCe
step 15: ReMoVe stRipaBLe fiLM
a
If the door has Stripable Film, remove now.
a
Springs may need to be periodically adjusted through the life of the door in accordance
with steps 16 A thru F. Maintain instructions for the life of the door.
B
Check all bolts and nuts, to ensure they are tight as needed.
D
To decrease spring tension, momentarily pull down
on ratchet and then lift the spring roll pin on the dual
tensioner’s knurled wheel. gently let up on the ratchet,
allowing the axle to rotate ¼ turn to reduce the tension.
while holding the new tension, release the dual tension-
er’s spring roll pin. The dual tensioner will now grip
the axle and help hold the new tension setting. Have
someone else tighten all square red headed 3/8 inch set
screws in dual tensioner and axle support bracket at
both ends of the door.
e
Verify that all square, red headed 3/8 inch set screws in
dual tensioner and axle support bracket at both ends of
door are tightened prior to checking door operation.
f
Repeat steps 15A through 15E as necessary.