Tighten The Chain; Important Installation Instructions - Craftsman 139.53960SRT Manual Del Propietário

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ASSEMBLY STEP 5
Tighten the Chain
• Spin the inner nut and lock washer down the
threaded shaft, away from the trolley.
• To tighten the chain, turn outer nut in the direction
shown (Figure 1).
• When the chain is approximately 1/2" above the
base of the rail at its midpoint, re-tighten the inner
nut to secure the adjustment.
Sprocket noise can result if chain is too loose.
When installation is complete, you may notice some
chain droop with the door closed. This is normal. If
the chain returns to the position shown in Figure 2
when the door is open, do not re-adjust the chain.
NOTE.: During future maintenance, ALWAYS pull the
emergency release handle to disconnect trolley
before adjusting chain.
NOTE: You may notice loosening of chain after
Adjustment Step 3 (Test the Safety Reversal
System). Check for proper tension and readjust
chain if necessar_ Then repeat Adjustment Step 3.
You have now finished assembling your garage
door opener. Please read the following warnings
before proceeding to the installation section:
Figure 1
Outer Lock TroLley
Nut Washer Shaft
To Tigh,en Outer Nut ---i_-1 [ /
'T°n TI_Nh r utn
Figure 2
,,
Chain I
I
i
tIJI II ,1 ,,i,_ 1111 il II
i II/2 Inch
/
Base _)fRail Mid length of Rail
I NSTALLATION
IMPORTANT INSTALLATION INSTRUCTIONS
To reduce the risk of severe injury or death:
1. READ AND FOLLOW ALL INSTALLATION W ARNINGS
AND INSTRUCTIONS.
2. Install garagedoor opener only on properlybalanced
and lubricatedgarage door.An improperly balanced
door may not reversewhen requiredand could result in
severeinjury or death.
3. All repairsto cables,spring assemblies and other
hardwareMUSTbe macleby a traineddoor systems
technicianbeforeinstalling opener.
4. Disableall locks and remove all ropesconnectedto
garagedoor beforeinstalling openerto avoid
entanglement.
5. Install garagedoor opener 7 feet or more abovefloor.
6. Mount emergencyreleasehandle 6 feet abovefloor.
7. NEVER connectgaragedoor openerto powersource
until instructed to do so.
8. NEVER wearwatches,rings or looseclothing while
installing or servicingopener.Theycould be caughtin
garagedoor or openermechanisms.
9. Installwall-mountedgaragedoor control:
• within sight of the garagedoor
• out of reachof children at minimumheightof 5 feet
• awayfrom all moving parts of the door.
10. Placeentrapmentwarninglabelon wall nextto garage
door control.
11. Placemanualrelease/safety reversetest label in plain
view on inside of garagedoor.
12. Uponcompletionof installation,test safety reversal
system. DoorMUSTreverseon contact w ith a one-
inch high object(or a 2x4 laid flat) on the floor.
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