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Position the opener, Warning caution warning warning, Installation step 4 – Craftsman 139.5399 User Manual

Page 16

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ONE-PIECE DOOR WITHOUT TRACK

• With the door fully open and parallel to the floor,

measure the distance from the floor to the top of
the door.

• Using a stepladder as a support, raise the top of

the opener to this height.

• The top of the door should be level with the top of

the motor unit. Do not position the opener more
than 2" (5 cm) above this point.

INSTALLATION STEP 4

Position the Opener

Follow instructions which apply to your door type as
illustrated.

SECTIONAL DOOR OR ONE-PIECE DOOR WITH
TRACK

A 2x4 laid flat is convenient for setting an ideal door-
to-rail distance.

• Raise the opener onto a stepladder. You will need

help at this point if the ladder is not tall enough.

• Open the door all the way and place a 2x4 laid flat

on the top section beneath the rail.

• If the top section or panel hits the trolley when you

raise the door, pull down on the trolley release arm
to disconnect inner and outer sections. Slide the
outer trolley toward the motor unit. The trolley can
remain disconnected until Installation Step 12
is completed.

2x4

Door

Trolley

Header

Bracket

Top of Door

Top of Motor

ENGAGED

RELEASED

Trolley
Release Arm

To prevent damage to garage door, rest garage door
opener rail on 2x4 placed on top section of door.

WARNING

CAUTION

WARNING

WARNING