LiftMaster 1355 1355 Manual - Page 26

Installation Step 12

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INSTALLATION STEP 12 Connect Door Arm to Trolley Follow instructions which apply to your door type as illustrated below and on the following page. SECTIONAL DOORS ONLY • Make sure garage door is fully closed. Pull the emergency release handle to disconnect the outer trolley from the inner trolley. Slide the outer trolley back (away from the door) about 2" (5 cm) as shown in Figures 1, 2 and 3. • Figure 1: - Fasten straight door arm section to outer trolley with the 5/16"x1" clevis pin. Secure the connection with a ring fastener. - Fasten curved section to the door bracket in the same way, using the 5/16"x1-1/4" clevis pin. • Figure 2: - Bring arm sections together. Find two pairs of holes that line up and join sections. Select holes as far apart as possible to increase door arm rigidity. • Figure 3, Hole alignment alternative: - If holes in curved arm are above holes in straight arm, disconnect straight arm. Cut about 6" from the solid end. Reconnect to trolley with cut end down as shown. - Bring arm sections together. - Find two pairs of holes that line up and join with bolts, lock washers and nuts. • Proceed to Adjustment Step 1, page 28. Trolley will re-engage automatically when opener is operated. HARDWARE SHOWN ACTUAL SIZE Inner Trolley Outer Trolley Ring Fastener Clevis Pin 5/16"x1" Figure 1 Door Bracket Straight Door Arm Curved Door Arm Clevis Pin 5/16"x1-1/4" Lock Washers 5/16" Nuts 5/16"-18 Figure 2 Door Bracket Emergency Release Handle Bolts 5/16"-18x7/8" Nut 5/16"-18 Lock Washer 5/16" Ring Fastener Clevis Pin 5/16"x1" (Trolley) Clevis Pin Hex Bolt 5/16"x1-1/4" (Door Bracket) 5/16"-18x7/8" Lock Washers 5/16" Nuts 5/16"-18 Figure 3 Bolts 5/16"-18x7/8" Cut This End 26

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26
INSTALLATION STEP 12
Connect Door Arm to Trolley
Follow instructions which apply to your door type as
illustrated below and on the following page.
SECTIONAL DOORS ONLY
•
Make sure garage door is fully closed. Pull the
emergency release handle to disconnect the outer
trolley from the inner trolley. Slide the outer trolley
back (away from the door) about 2" (5 cm) as
shown in Figures 1, 2 and 3.
•
Figure 1:
– Fasten straight door arm section to outer trolley
with the 5/16"x1" clevis pin. Secure the
connection with a ring fastener.
– Fasten curved section to the door bracket in the
same way, using the 5/16"x1-1/4" clevis pin.
•
Figure 2:
– Bring arm sections together. Find two pairs of
holes that line up and join sections. Select holes
as far apart as possible to increase door arm
rigidity.
•
Figure 3, Hole alignment alternative:
– If holes in curved arm are above holes in straight
arm, disconnect straight arm. Cut about 6" from
the solid end. Reconnect to trolley with cut end
down as shown.
– Bring arm sections together.
– Find two pairs of holes that line up and join with
bolts, lock washers and nuts.
•
Proceed to Adjustment Step 1, page 28. Trolley will
re-engage automatically when opener is operated.
Ring
Fastener
Door
Bracket
Cle
v
is Pin
5/16"x1-1/4"
C
u
r
v
ed
Door Arm
Straight
Door Arm
Cle
v
is Pin
5/16"x1"
Inner Trolley
O
u
ter Trolley
Lock
W
ashers
5/16"
Nu
ts
5/16"-1
8
Door Bracket
Bolts
5/16"-1
8
x7/
8
"
Emergency
Release
Handle
Lock
W
ashers
5/16"
Nu
ts
5/16"-1
8
Bolts
5/16"-1
8
x7/
8
"
C
u
t This End
Figure 1
Figure 2
Figure 3
Lock Washer 5/16"
Nut 5/16"-18
Ring Fastener
Hex Bolt
5/16"-18x7/8"
Clevis Pin
5/16"x1" (Trolley)
Clevis Pin
5/16"x1-1/4" (Door Bracket)
HARDWARE SHOWN ACTUAL SIZE