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34

Motor Unit Assembly Parts

KEY PART 
NO. NO. 

DESCRIPTION

 1 

31D380 

 

Sprocket cover

  2 

41C4220A 

 Gear and sprocket assembly 

Complete with:

 Spring washer, 

thrust washer, retaining ring, 
bearing plate, roll pins (2), drive 
gear and worm gear, helical 
gear with retainer and grease

 3 

41B4245 

Line cord

  4 

41A5484-1 

End panel with all labels 

 5 

4A1344 

Light socket

 6 

108D79 

Lens 

  7 

30B532 

Capacitor - 1/2 HP

 8 

12A373 

Capacitor bracket

 9   

41A3150 

Terminal block with screws

10  

41D3058 

 Universal replacement motor & 
bracket assembly
 

Complete with:

 Motor, worm, 

bracket, bearing assembly, RPM 
sensor

KEY PART 
NO. NO. 

DESCRIPTION

11  

41D498-6 

Cover 

12  

41A2818 

Limit switch drive & retainer

13  

41D3452 

Limit switch assembly

14  

41A2822-1 

Interrupter cup assembly

15  

41C4398A 

RPM sensor assembly 

16  

41AC050-1M   Receiver logic board

Complete with: 

Logic board, 

end panel with all labels

17  

41C5498 

Low voltage wire harness

 

 

41C5497 

High voltage wire harness

18  

41D181 

End panel with all labels 

 

 

 

NOT SHOWN

 

 

41A2826 

Motor shaft bearing kit

 

 

41A2825 

 Opener assembly hardware kit 
(includes screws not designated 
by a number in illustration)

1

2

3

6

7

8

9

11

14

13

15

16

17

18

10

12

5

4

LIMIT SWITCH ASSEMBLY

(Down) 
Contact

Brown 
Wire

Drive 
Gear

Center Limit 
Contact

(Up) 
Contact

Yellow 
Wire

Grey 
Wire

Summary of Contents for 3255ADM 1/2 HP

Page 1: ...T CLOSE unless the Protector System is connected and properly aligned Periodic checks of the opener are required to ensure safe operation The model number label is located on the front panel of your opener GARAGE DOOR OPENER Model 3255ADM 1 2 HP For Residential Use Only Complies with UL325 regulations effective January 1 1993 ANAHEIM GARAGE DOORS ANAHEIM CA ...

Page 2: ...er 28 Having a problem 29 Diagnostic chart 30 Programming 31 32 To add or reprogram a hand held remote control 31 To erase all codes 31 3 Button remotes 31 To add reprogram or change a Keyless Entry PIN 32 Repair Parts 33 34 Rail assembly parts 33 Installation parts 33 Motor unit assembly parts 34 Accessories 35 Repair Parts and Service 36 Warranty 36 TABLE OF CONTENTS When you see these Safety Sy...

Page 3: ...glement Preparing your garage door Before you begin Disable locks Remove any ropes connected to garage door Complete the following test to make sure your garage door is balanced and is not sticking or binding 1 Lift the door about halfway as shown Release the door If balanced it should stay in place supported entirely by its springs 2 Raise and lower the door to see if there is any binding or stic...

Page 4: ...s closed Support bracket fastening hardware is required See page 12 Motor Unit FINISHED CEILING Wall Mounted Door Control Extension Spring OR Torsion Spring Header Wall Access Door Safety Reversing Sensor Vertical Centerline of Garage Door Gap between floor and bottom of door must not exceed 1 4 6 mm Gap between floor and bottom of door must not exceed 1 4 6 mm Gap between floor and bottom of door mu...

Page 5: ...Nut 5 16 18 4 Lock Washer 5 16 4 Screw 6ABx1 1 4 2 Screw 6 32x1 2 Self Threading Screw 1 4 14x5 8 2 Insulated Staples 10 Ring Fastener 3 Drywall Anchors 2 Carriage Bolt 1 4 20x1 2 2 Wing Nut 1 4 20 2 Rope Handle SECURITY 2 Button Remote Control Multi Function Door Control Panel Motor Unit with Light Lens Header Bracket Safety Reversing Sensor Bracket 2 Safety Labels and Literature Door Bracket Cur...

Page 6: ... nut on the trolley to obtain more chain slack Insert the second washered bolt CAUTION Use only the bolt previously removed from motor unit Tighten both bolts securely through the rail into the motor unit as shown Install the sprocket cover Insert the back tab in the slot Squeeze the cover slightly and insert the front tab in the slot on the mounting plate To avoid possible SERIOUS INJURY to finger...

Page 7: ...alanced and lubricated garage door An improperly balanced door may NOT reverse when required and could result in SEVERE INJURY or DEATH 3 ALL repairs to cables spring assemblies and other hardware MUST be made by a trained door systems technician BEFORE installing opener 4 Disable ALL locks and remove ALL ropes connected to garage door BEFORE installing opener to avoid entanglement 5 Install garag...

Page 8: ...or the top edge of the door NOTE If the total number of inches exceeds the height available in your garage use the maximum height possible or refer to page 9 for ceiling installation To prevent possible SERIOUS INJURY or DEATH Header bracket MUST be RIGIDLY fastened to structural support on header wall or ceiling otherwise garage door might NOT reverse when required DO NOT install header bracket o...

Page 9: ...he ceiling as shown Center the bracket on the vertical mark no more than 6 15 cm from the wall Make sure the arrow is pointing toward the wall The bracket can be mounted flush against the ceiling when clearance is minimal Mark the side holes Drill 3 16 pilot holes and fasten bracket securely to a structural support with the hardware provided Header Bracket 2x4 Structural Support Vertical Centerline...

Page 10: ...pener securely on a temporary support to allow the rail to clear the spring Position the rail bracket against the header bracket Align the bracket holes and join with a clevis pin as shown Insert a ring fastener to secure HARDWARE SHOWN ACTUAL SIZE Header Wall Header Bracket Header Bracket Clevis Pin 5 16 x2 3 4 Chain Pulley Bracket Rail Temporary Support Ring Fastener Clevis Pin 5 16 x2 3 4 Garag...

Page 11: ...venient for setting an ideal door to rail distance Remove foam packaging Raise the opener onto a stepladder You will need help at this point if the ladder is not tall enough Open the door all the way and place a 2x4 laid flat on the top section beneath the rail If the top section or panel hits the trolley when you raise the door pull down on the trolley release arm to disconnect inner and outer sec...

Page 12: ...n line with the header bracket if the bracket is not centered above the door 7 Remove the 2x4 Operate the door manually If the door hits the rail raise the header bracket NOTE DO NOT connect power to opener at this time To avoid possible SERIOUS INJURY from a falling garage door opener fasten it SECURELY to structural supports of the garage Concrete anchors MUST be used if installing ANY brackets ...

Page 13: ...ing 1 8 3 mm to protrude above wall surface Position bottom of door control on screw head and slide down to secure Adjust screw for snug fit Install top screw with care to avoid cracking plastic housing DO NOT overtighten Insert bottom tabs and snap on cover NOTE The push bar may stick if the door control is not mounted on a smooth surface If a click is not heard when pressing the push bar loosen t...

Page 14: ...he hole in the release arm of the outer trolley Adjust rope length so the handle is 6 feet 1 83 m above the floor Ensure that the rope and handle clear the tops of all vehicles to avoid entanglement Secure with an overhand knot NOTE If it is necessary to cut the rope heat seal the cut end with a match or lighter to prevent unraveling To prevent possible OVERHEATING of the endpanel or light socket D...

Page 15: ...d Connect the black line wire to the screw on the brass terminal the white neutral wire to the screw on the silver terminal and the ground wire to the green ground screw The opener must be grounded Reinstall the cover To avoid installation difficulties do not run the opener at this time To prevent possible SERIOUS INJURY or DEATH from electrocution or fire Be sure power is NOT connected to the opene...

Page 16: ...ceiving eye lens The mounting brackets are designed to clip onto the track of sectional garage doors without additional hardware If it is necessary to mount the units on the wall the brackets must be securely fastened to a solid surface such as the wall framing Extension brackets see Accessories are available if needed If installing in masonry construction add a piece of wood at each location to a...

Page 17: ...e floor Attach brackets to wall with lag screws not provided If using extension brackets or wood blocks adjust right and left assemblies to the same distance out from the mounting surface Make sure all door hardware obstructions are cleared Floor installation Figure 4 Use wood blocks or extension brackets see Accessories to elevate sensor brackets so the lenses will be no higher than 6 15 cm above ...

Page 18: ...follow the instructions below Cut the end of the safety reversing sensor wire making sure there is enough wire to reach the pre installed wires from the wall Figure 7 Separate the safety reversing sensor wires and strip 7 16 11 mm of insulation from each end Choose two of the pre installed wires and strip 7 16 11 mm of insulation from each end Make sure that you choose the same color pre installed...

Page 19: ...correct wiring between sensors and opener A broken wire 2 If the sending eye indicator light glows steadily but the receiving eye indicator light doesn t Check alignment Check for an open wire to the receiving eye 3 If the receiving eye indicator light is dim realign either sensor NOTE When the invisible beam path is obstructed or misaligned while the door is closing the door will reverse If the d...

Page 20: ...depending on your door s construction Metal or light weight doors using a vertical angle iron brace between the door panel support and the door bracket Drill 3 16 fastening holes Secure the door bracket using the two 1 4 14x5 8 self threading screws Figure 2A Alternately use two 5 16 bolts lock washers and nuts not provided Figure 2B Metal insulated or light weight factory reinforced doors Drill 3...

Page 21: ...the door if required for your installation Refer to the dotted line optional placement drawing HARDWARE SHOWN ACTUAL SIZE Self Threading Screw 1 4 14x5 8 WOOD DOOR METAL DOOR Finished Ceiling HORIZONTAL AND VERTICAL REINFORCEMENT IS NEEDED FOR LIGHTWEIGHT GARAGE DOORS FIBERGLASS ALUMINUM STEEL DOORS WITH GLASS PANEL ETC NOT PROVIDED Self Threading Screw 1 4 14x5 8 Top of Door Inside Garage Top of ...

Page 22: ...e alignment alternative If holes in curved arm are above holes in straight arm disconnect straight arm Cut about 6 15 cm 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 Pull the emergency release handle toward the opener at a 45 angle so that the trolley release arm is hori...

Page 23: ...sh button The trolley will travel to the fully closed position Figure 5 Figure 6 Manually close the door and lift the door arm to the trolley The arm should touch the trolley just ahead of the door arm connector hole Refer to the fully closed trolley door arm positions in the illustration If the arm is behind the connector hole adjust the limit further One full turn equals 2 5 cm of trolley travel...

Page 24: ...ce as explained in Adjustment Step 2 If the door does not close completely Increase down travel Turn the DOWN limit adjustment screw counterclockwise One turn equals 2 5 cm of travel If door still won t close completely and the trolley bumps into the pulley bracket page 4 try lengthening the door arm page 22 and decreasing the down limit If the opener reverses in fully closed position Decrease dow...

Page 25: ... by turning the control clockwise Make small adjustments until the door completes a close cycle After each adjustment run the opener through a complete travel cycle Do not increase the force beyond the minimum amount required to close the door 2 Test the UP open force Grasp the door bottom when the door is about halfway through UP open travel The door should stop If the door is hard to hold or doe...

Page 26: ...obstruction and run the opener through 3 or 4 complete travel cycles to test adjustment If the unit continues to fail the Safety Reverse Test call for a trained door systems technician IMPORTANT SAFETY CHECK Test the Safety Reverse System after Each adjustment of door arm length limits or force controls Any repair to or adjustment of the garage door including springs and hardware Any repair to or ...

Page 27: ...ated Bulb size is A19 Bulb power is 100 watts maximum Security light feature Lights will also turn on when someone walks through the open garage door With a Multi Function Door Control this feature may be turned off as follows With the opener lights off press and hold the light button for 10 seconds until the light goes on then off again To restore this feature start with the opener lights on then...

Page 28: ...le to disengage trolley ONLY when garage door is CLOSED Weak or broken springs or unbalanced door could result in an open door falling rapidly and or unexpectedly NEVER use emergency release handle unless garage doorway is clear of persons and obstructions NEVER use handle to pull door open or closed If rope knot becomes untied you could fall Care of Your Opener LIMIT AND FORCE ADJUSTMENTS Weather...

Page 29: ...s to force or travel limits The need for occasional adjustment for the force and limit settings is normal Weather conditions in particular can affect door travel Refer to Adjustment Step 1 Adjust the UP and DOWN Travel Limits Decrease down travel by turning down limit adjustment screw clockwise 5 My lights will not turn off when door is open The garage door opener is equipped with a security light...

Page 30: ...or unit Momentarily short across red and white terminals with jumper wire If motor unit activates replace door control wires Symptom Sending indicator light glows steadily receiving indicator light is dim or flashing Realign receiving eye sensor clean lens and secure brackets Verify door track is firmly secured to wall and does not move Symptom Motor has over heated the motor unit does not operate o...

Page 31: ...ll be heard 1 Press and release the learn button on the motor unit The learn indicator light will glow steadily for 30 seconds 2 Within 30 seconds press and hold the button on the hand held remote that you wish to operate your garage door 3 Release the button when the motor unit lights blink It has learned the code If light bulbs are not installed two clicks will be heard PROGRAMMING NOTICE If thi...

Page 32: ... will blink once when the PIN has been learned Test by pressing the new PIN then press ENTER The door should move To set a temporary PIN You may authorize access by visitors or service people with a temporary 4 digit PIN After a programmed number of hours or number of accesses this temporary PIN expires and will no longer open the door It can be used to close the door even after it has expired To ...

Page 33: ...Button remote control 3 10A20 3V2032 Lithium battery 4 29B137 Remote control visor clip 5 41A2828 Emergency release rope handle assembly 6 41B4494 1 2 Conductor bell wire white white red 7 41A4353 Header bracket with clevis pin fastener 8 41A5047 Door bracket with clevis pin fastener 9 178B35 Curved door arm section 10 178B34 Straight door arm section 11 41A5034 Safety reversing sensor kit receivi...

Page 34: ...Motor worm bracket bearing assembly RPM sensor KEY PART NO NO DESCRIPTION 11 41D498 6 Cover 12 41A2818 Limit switch drive retainer 13 41D3452 Limit switch assembly 14 41A2822 1 Interrupter cup assembly 15 41C4398A RPM sensor assembly 16 41AC050 1M Receiver logic board Complete with Logic board end panel with all labels 17 41C5498 Low voltage wire harness 41C5497 High voltage wire harness 18 41D181...

Page 35: ...rammable number of hours or entries 378LM Security 3 Button Mini Remote Control With key ring and fastening strip Garage Door Monitor Security for the largest door of your home Tells you if your garage door is open or closed Monitors up to 4 garage doors by adding additional sensor modules 915LM 975LM 990LM Laser Park Assist Laser enables homeowners to precisely park vehicles in the garage Surge P...

Page 36: ... 2011 The Chamberlain Group Inc 114A4324B All Rights Reserved TO ORDER REPAIR PARTS CALL OR WRITE Anaheim Door 4900 E LaPalma Anaheim CA 92807 Phone 1 714 779 1919 ...

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