LiftMaster J Industrial-Duty Jackshaft Operator Replacement Parts

Liftmaster K75-19978-L Frame Plate Kit, Left Hand

$57.50

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Liftmaster K75-19977 Arm Kit, J

$146.22

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Liftmaster K21-14182 Transformer, 120/240V, 24VAC, 20VA

LiftMaster K21-14182 120/240V to 24VAC 20VA Transformer

$39.20

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Liftmaster K21-35077 Transformer, 575V, 24VAC

LiftMaster K21-35077 575V to 24VAC 40VA Transformer

$81.34

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LiftMaster K79-15016-1 RPM Sensor Kit

$70.66

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LiftMaster K72-12515-1 Limit Switch Assembly Kit

$47.57

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Liftmaster K75-36913 Cover for Current Sense Kit, H, J, L5

$64.30

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Liftmaster K21-36793 Transformer, 208/230/460V-20VA

$43.57

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Liftmaster K76-38001 Current Sense and MOV Kit, 3PH, H, J K74-31243

$58.71

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Liftmaster K001D8395 Logic Board Kit with Current Sense, L5

$169.95

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Liftmaster K001C8103-1 Antenna

$35.58

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Liftmaster K001D8397 Power Board Kit, 3PH, L5

$139.38

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Liftmaster K001D8397-1 Power Board Kit, 575V, L5

LiftMaster K001D8397-1 3 Phase Power Board Kit, 575V, Logic 5

$153.97

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LiftMaster 751 L5, K20-1075B-2LP-H24 115/230V 1PH 60Hz, Standard 3/4 HP Replacement Motor Kit

$493.71

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LiftMaster 753 L5, K20-3075B-4P-H24 230/460V 3PH 60Hz, Standard 3/4 HP Replacement Motor Kit

$480.63

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LiftMaster 755 L5, K20-3075M-5-H25 575V 3PH 60Hz, Standard 3/4 HP Replacement Motor Kit

$799.95

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LiftMaster 501 L5, K20-1050B-2LP-H24, 115/230V 1PH 60Hz Standard 1/2 HP Replacement Motor Kit

$399.52

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LiftMaster 503 L5, K20-3050B-4P-H24, 230/460V 3PH 60Hz Standard 1/2 HP Replacement Motor Kit

$499.95

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LiftMaster 505 L5, K20-3050M-5-H25, 575V 3PH 60Hz Standard 1/2 HP Replacement Motor Kit

$737.58

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LiftMaster 103 L5, K20-3100B-4P-H24 230/460V 3PH 60Hz, Standard 1HP Replacement Motor Kit

$575.35

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LiftMaster 105 L5, K20-3100M-5-H25 575V 3PH 60Hz, Standard 1HP Replacement Motor Kit

$890.61

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Liftmaster K23-10041 Limit Switch Replacement Kit (SPDT, 10A 125/250VAC) 1/2 HP

LiftMaster K23-10041 SPDT 10A Limit Switch for Select 1/2 HP Commercial Door and Gate Operators

$15.25

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Liftmaster K72-14130-1 Replacement Limit Shaft Kit Commercial Electrical Box

LiftMaster K72-14130-1 Limit Shaft Kit for Commercial Operator Electrical Boxes

$86.60

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Liftmaster K22-575-1 Brake Solenoid (575V/60Hz) Replacement Kit Commercial Gate

LiftMaster K22-575-1 575V/60Hz Brake Solenoid Kit for Logic 5.0 Operators

$145.10

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Liftmaster K22-36899 1PH/L5 Brake Solenoid Replacement Kit Commercial Openers

LiftMaster K22-36899 1PH/L5 Brake Solenoid 208-230V Replacement Kit for Logic 5.0 Operators

$93.79

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Liftmaster K17-6014 replacement Pulley (2

LiftMaster K17-6014 Pulley 2 Inch OD 5/8 Inch Bore for Gate and Door Operators

$15.56

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LiftMaster K16-5L304 Replacement Cogged V-Belt (30-1/32") Kit Commercial Door

$36.95

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Liftmaster K20-1100B-2LP-H24 replacement Motor Kit (1HP, 1PH, L5) Logic 5.0

$742.40

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Liftmaster K13-10024 Limit Nut Replacement Part Commercial Door Operators

$11.73

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Liftmaster K72-19975 Clutch Shaft Replacement Kit Commercial Door Operator

LiftMaster K72-19975 Clutch Shaft Kit for J Commercial Door Operators

$268.86

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Liftmaster K72-19974 replacement Output Shaft Kit (H,J) Commercial Door Gate

LiftMaster K72-19974 Output Shaft Kit for H, J and HJ Commercial Operators

$235.87

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Liftmaster 129050 Flange Bearing, 1"

$9.95

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Liftmaster K001D8396-1 K001D8396, K001D8072-1 Power Board 1PH Logic 5

$149.95

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Liftmaster K13-10024 2-Pack Limit Nut Replacement Part Commercial Door Operators

$22.00

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LiftMaster K75-19985 Commercial Operator Pulley Assembly

$64.75

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Liftmaster 15-19478 Sprocket, 48B32T, 1-1/2

LiftMaster K15-19478 48B32T Sprocket 1-1/2 Inch Bore

$25.38

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LiftMaster 15-19484 14T48 Sprocket

$16.59

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Liftmaster K71-D1PH Drum Brake Kit, 120V

LiftMaster K71-D1PH 120V Single Phase Drum Brake Kit

$313.12

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Liftmaster K71-D3PH DRUM BRAKE KIT, 240V

LiftMaster K71-D3PH 240V Three Phase Drum Brake Kit

$332.72

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Frequently Asked Questions : Liftmaster J Industrial-Duty Jackshaft Operator Replacement Parts

Q1: What are the primary replacement parts available for the LiftMaster J jackshaft operator?

A1: Common replacement components for the LiftMaster J operator include Logic control boards, industrial-duty motors, limit switch assemblies, and contactors. Mechanical hardware such as drive sprockets, chains, and bearings are also frequently replaced to maintain system integrity.

Q2: How do I verify the correct replacement Logic board for my LiftMaster J operator?

A2: To identify the compatible Logic control board, locate the exact part number stamped on the existing board or refer to the operator's specification plate. The replacement board must match the specific voltage, phase, and Logic generation of the existing unit.

Q3: Are LiftMaster J operator parts interchangeable with other jackshaft models?

A3: While standard mechanical parts like roller chains may be universal, major electrical components and motors are engineered specifically for the J series' torque and voltage ratings. Always consult the manufacturer's parts diagram to ensure correct component compatibility.

Q4: What should be done if the industrial-duty motor on the LiftMaster J fails?

A4: Replacing a high-voltage industrial motor involves handling complex electrical wiring and heavy mechanical components. For personal safety and to ensure operational integrity, this procedure must be completed by a licensed electrician or a local qualified professional.

Q5: Why might the limit switch assembly on a jackshaft operator need replacement?

A5: Limit switches experience constant mechanical wear during high-cycle operations. If the commercial door begins to over-travel or fails to stop at the designated boundaries, the internal cams or switches are likely worn and require replacement.

Q6: What safety devices are compatible with the LiftMaster J operator?

A6: The LiftMaster J requires continuous-monitoring safety peripherals, such as commercial photoelectric sensors or optical safety edges, to meet UL 325 standards. Refer to the manufacturer's installation manual to confirm that replacement sensors are compatible with the specific Logic board.

Q7: Can a damaged contactor on the LiftMaster J be repaired?

A7: The contactor is a high-voltage relay that transfers power to the motor and is not designed for internal repair. When the internal electrical contacts become pitted or fused from repetitive use, the entire contactor block must be replaced.

Q8: What indicates that the drive sprocket on a jackshaft operator needs replacing?

A8: A drive sprocket requires replacement if the teeth become rounded, broken, or if there is excessive play on the drive shaft. Using worn sprockets can cause the drive chain to slip, leading to improper door operation and potential mechanical failure.

Q9: Who is qualified to replace the internal clutch mechanism on the LiftMaster J?

A9: The internal friction clutch protects the door hardware by allowing slippage during an obstruction or binding event. Adjusting or replacing this tension-loaded mechanism requires specialized knowledge and should only be performed by a local qualified technician.

Q10: What maintenance is required after installing new mechanical replacement parts?

A10: Newly installed chains, sprockets, and bearings must be correctly aligned, tensioned, and lubricated according to factory specifications. For detailed maintenance schedules and safety testing procedures, consult the technical manual provided by the manufacturer.

LiftMaster J Industrial-Duty Jackshaft Operator Replacement Parts

Products [39]

Frequently Asked Questions : Liftmaster J Industrial-Duty Jackshaft Operator Replacement Parts

Q1: What are the primary replacement parts available for the LiftMaster J jackshaft operator?

Q2: How do I verify the correct replacement Logic board for my LiftMaster J operator?

Q3: Are LiftMaster J operator parts interchangeable with other jackshaft models?

Q4: What should be done if the industrial-duty motor on the LiftMaster J fails?

Q5: Why might the limit switch assembly on a jackshaft operator need replacement?

Q6: What safety devices are compatible with the LiftMaster J operator?

Q7: Can a damaged contactor on the LiftMaster J be repaired?

Q8: What indicates that the drive sprocket on a jackshaft operator needs replacing?

Q9: Who is qualified to replace the internal clutch mechanism on the LiftMaster J?

Q10: What maintenance is required after installing new mechanical replacement parts?