A: ASSEMBLY INSTRUCTIONS 
If Your Opener Is Supplied Fully Assembled, Please Disregard This Page.
NOTE: The Rail/Chain Assembly is |
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| Force Adjusting | ||||||
packaged separately from | the | Power |
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Head Unit. | The trolley, | front | idler/ |
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| Spring | |||||||||
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| Locking Nut | |||||||
tension adjustment assembly, | chain, |
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drive gear and limit cams are assembled |
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to the Rail/Chain Assembly at the |
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factory. Follow the steps | outlined |
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| Double Key Hole |
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below to complete assembly prior to |
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installation. Refer to the component |
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identification | illustrations | on the | Assembled and |
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previous page. | In Position |
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STEP 1: Prior to attaching the motor |
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drive unit to the rail assembly, the Open |
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and Close adjustment bolts must be installed. Place the threaded end of the adjustment bolt through the hole in the rail and then slip the head of the bolt through the center of the double key
hole. Slide the spring over the bolt and attach load adjusting nut. Tighten until the tip of the bolt extends 3/16” outside the nut. Repeat above for the other side.
STEP 2: Protect the Power Unit cover from scratching during assembly by placing it on cardboard. Loosen the two 5/16" lock washer nuts on top of the power head drive unit.
STEP 3: VERY IMPORTANT ! Position a paper shim around the power head unit drive gear (standard weight paper, see illustration). Shim must remain in place while assembling the power head unit to the Rail/Chain assembly to ensure a proper gear mesh and avoid excessive long term wear.
STEP 4: Align the four key holes in the Rail/Chain assembly with |
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the two front guide tabs and the two rear bolt studs on the power head | 5/16” Lock |
unit and place the rail/chain assembly in place over the power head | Washer Nuts |
unit. The power head drive unit limit lever protrudes up through the |
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rail/chain assembly sensing plate. Take care not to bend the lever |
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when assembling. | Slide |
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the | power head | drive |
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| Limit Lever |
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unit | forward | until | the |
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gear |
| meshes | with | the |
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rail/chain | assembly |
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drive | gear. | Check | to |
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make | sure | the | front |
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guide tabs on the power |
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head | unit are securely |
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locked on the rail/chain |
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assembly. |
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| bend limit lever |
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Limit
Lever
Front Guide
Tabs (2)
Paper Shim
STEP 5: The power head drive unit should be move forward until all play between the gears has been eliminated, but no additional force should be used that could cause pressure on the motor (power head unit) drive gear. Tighten the two 5/16" lock washer nuts on top of the power head drive unit that were loosened in Step 2 above.
When the opener is first activated the paper shim will be ejected. The paper shim should have the profile of the gears to indicate the proper mesh between them.
STEP 6: Recheck the nuts used to secure the Rail/Chain assembly to the Power Head Unit, making sure they are tight.
Assembly is now complete and you are ready to begin installation of the opener.
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