Chamberlain 7520D 1/2 HP Motor Unit Assembly Parts

Motor Unit Assembly Parts

118

2

6	3	4	17
6			17
			6
		10
	5	16
	5

7

	8	11	15	19
	8	11

		14	13	(Down)
	9		Brown	(Down)
	9		Brown	Contact
			Wire
				DN
	12		Drive
			Gear

7

LIMIT SWITCH ASSEMBLY

Grey

Wire

UP

	Center Limit	(Up)	Yellow
	Contact	Contact
			Wire

	KEY	PART		KEY	PART
	NO.	NO.	DESCRIPTION	NO.	NO.	DESCRIPTION
	1	41A5615	Chain Spreader	12	41A5525-5	Cover
	2	41C4220A	Gear and sprocket assembly.	13	41A2818	Limit switch drive & retainer
			Complete with: Spring washer,	14	41D3452	Limit switch assembly
			thrust washer, retaining ring,
				15	41A2822-1	Interrupter cup assembly
			bearing plate, roll pins (2), drive
				16	41C4398A	RPM sensor assembly
			gear and worm gear, helical gear
			w/retainer and grease	17	41AC050	Receiver logic board assembly.

	3	41A2817	Drive/worm gear kit w/grease,			Complete with: Logic board,
			roll pins (2)			end panel w/all labels, light
	4	41B4245	Line cord			socket
				18	41C5497	High voltage wire harness
	5	41A5484-11	End panels w/all labels
					41C5498	Low voltage wire harness
	6	4A1344	Light socket
				19	41D180-1	End panel w/all labels
	7	108D79	Lens
						NOT SHOWN
	8	30B532	Capacitor - 1/2 HP
					41A2826	Motor shaft bearing kit
	9	12A373	Capacitor bracket
					41A2825	Opener assembly hardware kit
	10	41A3150	Terminal block w/screws
						(includes screws not designated
	11	41D3058	Universal replacement motor &
						by a number in illustration)

bracket assembly.

Complete with: Motor, worm, bracket, bearing assembly, RPM sensor

38

Contents

For Residential Use Only Introduction Assembly Adjustment Operation Installation11-26 Preparing your garage door Tools needed Planning Planning (Continued) Carton Inventory Hardware Inventory Assemble the Rail & Install the Trolley Fasten the Rail to the Motor Unit Install the Idler Pulley Install the Chain/Cable Tighten the Chain Determine the Header Bracket Location Install the Header Bracket Attach the Rail to the Header Bracket Position the Opener Hang the Opener Install the Door Control Install the Lights Attach the Emergency Release Rope and Handle Electrical Requirements Install The Protector System® INSTALLING THE BRACKETS Garage door track installation (preferred): Wall installation (Figure 2 & 3): Floor installation (Figure 4): MOUNTING AND WIRING THE SAFETY SENSORS ALIGNING THE SAFETY SENSORS TROUBLESHOOTING THE SAFETY SENSORS Fasten the Door Bracket ONE-PIECEDOORS Metal Doors: Connect Door Arm to Trolley ALL ONE-PIECEDOORS 1.Assemble the door arm, Figure 4: 2.Adjustment procedures, Figure 5: •Open door adjustment: decrease UP travel limit •Closed door adjustment: decrease DOWN travel limit Adjust the UP and DOWN Travel Limits Adjust the Force Test the Safety Reversal System Test The Protector System® Using Your Garage Door Opener Using the Wall-MountedDoor Control To Open the Door Manually CARE OF YOUR OPENER LIMIT AND FORCE ADJUSTMENTS: THE REMOTE CONTROL BATTERY Repeat the safety reverse test (Adjustment Step 3, page 29) after any adjustment of limits or force HAVING A PROBLEM 1. My door will not close and the light bulbs blink on my motor unit: 2. My remotes will not activate the door: 3. My door reverses for no apparent reason: 1 FLASH 2 FLASHES 3 FLASHES 4 FLASHES 5 FLASHES To Add or Reprogram a Hand-heldRemote Control To Erase All Codes From Motor Unit Memory *3-ButtonRemotes To Add, Reprogram or Change a Keyless Entry PIN Rail Assembly Parts Installation Parts Motor Unit Assembly Parts ACCESSORIES 953D 3-ButtonSECURITY✚® Remote Control: 956D CHAMBERLAIN® ONE YEAR LIMITED WARRANTY SIX YEAR MOTOR LIMITED WARRANTY