Rail — Header Segment
Rail — Middle Segments x2
Rail — End Segment with Trolley Stop Bolt
Master Link Set
(Including 1x spare set)
x 2
x 1
Discard 1 Middle Segment (25-3/5 inch)
Extended Chain Segment (approx. 17-1/3 inch)
Kit Inventory
x 1
Components Required from Opener Inventory
End Segment with Trolley Stop Bolt
Extended Middle Segment (39-2/5 inch)
Original Middle Segment (25-3/5 inch)
Header Segment
WARNING
- Discard ONLY ONE of the original MIDDLE rail segment.
- ONLY 5 pieces of rail segment should be applied. NEVER connect extra rail segments.
- The opener only services door to max. of 8 FT. height. Door with other size please call service before installation.
Replace ONE of the original rail Middle Segment with the “Extended Rail Segment” in the middle of rail assembly.
STEP 1. To Assemble Rail with “Extended Middle Segment”
Original Middle Segment (25-3/5 inch)
Chain
GARAGE DOOR OPENER EXTENSION KIT
MODEL: 425-1601
WARNING
To prevent SERIOUS INJURY or DEATH:
- DO NOT connect power until instructed.
- CLOSE the door before installation.
Extended Cable (approx. 121-1/2 inch)
x 1
Trolley Shaft
and Cable
Please refer to “Rail and Trolley Assembly” in Owner’s Manual.
Trolley
1
www.gdohelp.com
1-877-GDO-4402
1-877-436-4402
2301 Traffic St. NE
Minneapolis, MN 55413
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