Craftsman 139.536481DM Owner's Manual page 25

INSTALLATION STEP 12
ConnectDoorArm to Trolley
Follow instructions which apply to your door type as illustrated
below and on the following page.
SECTIONAL DOORSONLY
• Make sure garage door is fully closed. Pull the emergency
releasehandle 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:
- Fastenstraight door arm section to outer trolley with the
5/16"x1"clevis pin. Secure the connection with a ring
fastener.
- Fastencurved section to the door bracket in the same way,
using the 5/16"x1-1/4" clevis pin.
IMPORTANT." T hegroove on the straight door arm MUST face
away from the curved door arm (Figure 4).
• Figure2:
- Bring arm sections together. Findtwo pairs of holes that line
up and join sections. Select holes as far apart as possible to
increase door arm rigidity.
• Figure 3, Hole alignmentalternative:
- If holes in curved arm are above holes in straight arm,
disconnect straight arm. Cut about 6" (15 cm) from the solid
end. Reconnectto 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.
• Proceedto Adjustment Step 1, page 27. Trolley will re-engage
automatically when opener is operated.
HARDWARESHOWN ACTUALSIZE
Nut5/16"-18 Lock Washer 5/16" Ring Fastener
Clevis Pin Clevis Pin
5/16"x1" (Trolley) 5/16"x1-1/4" (Door Bracket)
Hex Bolt
5/16"-18x7/8"
Figure 1
Ring
Fastener
/
Door
Bracket
Clevis Pin
5/16"x1-1/4"
Curved
Door Arm
Figure 2
Was!ers /2/
.-.IL
.q/J
Nuts "(_ "_1J-,_7 ,_1
5/16"-18 /o_ ''"_ Emergency
_'_ L / _ Release
"_''//o/ _ Handle
_oL--'----J f-,_. _ Bolts
_"_ _ _" 5/16"-18X7/8'
I Door Bracket
Figure 3
Lock /0/
I
Washers /o/ I
.? /oy I
Nuts M
q % /o7" ),
Bolts
" Cut This End
Figure 4
CORRECT INCORRECT
25