Install Trolley - Chamberlain 1120E-1/2HP Owner's Manual

ASSEMBLY STEP 2

Install Trolley

• Attach trolley threaded shaft to trolley with lock
washer and nuts as shown.
Lock Washer
Outer Nut
5/16"
Trolley
Temporary Stop
Screwdriver
ASSEMBLY STEP 3
Fasten T-Rail to Opener
• Place the opener on packing material to protect the
cover. For convenience, place a support under the
chain pulley bracket.
• Remove the (2) 5/16"-18x1/2" washered screws
mounted in the top of the opener.
• Align holes in the back end of T-rail with holes in
opener.
• Fasten the rail with the (2) washered screws
previously removed. Tighten securely.
Use only these screws! Use of any other screws
will cause serious damage to door opener.
• Insert a 5/16"-18x7/8" hex screw into the cover
protection bolt hole in the T-rail as shown. Tighten
securely with a 5/16" lock washer and nut.
NOTE: This screw prevents trolley over-travel. Keep
a 25mm minimum between the trolley and this
screw when adjusting travel limits (see page 23).
Model 1120E Only: Attach chain spreader with
#8x1" hex screws and washers as shown.
Hardware Shown Actual Size
Hex Screw
5/16"-18x7/8"
Inner Nut
5/16"
5/16"
Trolley
Threaded
Shaft
Nut Lock Washer
5/16"
5/16"-18
Hardware Shown Actual Size
• As a temporary stopo, insert a screwdriver into hole
in front end of the T-rail.
• Slide trolley assembly along the rail to the
screwdriver stop.
If trolley hits against nut on the T-rail, the bolts
and nuts were attached from the wrong side and
must be repositioned. Review Step 1.
To fasten rail, use only those screws
mounted in the top of the opener. Any
other screws will cause serious
damage to the opener.
MODEL 1120E ONLY
Washers
Washered Screws
5/16"-18x1/2"
Hex Screw
5/16"-18x7/8"
Cover
Protection
Bolt Hole
Lock Washer
5/16"
Nut
5/16"-18
9
Lock Washer
Nut
5/16"
5/16"-18
13mm Socket Wrench
#8x1"
Hex Screws
Chain
Spreader
USE ONLY THIS
TYPE AND SIZE
SCREW
13mm Socket Wrench