LiftMaster HJ Industrial-Duty Hoist 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 11-19473 Clutch Shaft, HJ

$35.01

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Liftmaster K75-19981 Arm Kit, H

$149.11

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LiftMaster K72-19982 HJ Clutch Shaft Kit

$330.53

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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 K22-36900 3PH/L5 Brake Solenoid Replacement Kit (208V-230V/60Hz)

LiftMaster K22-36900 3PH/L5 Brake Solenoid 208-230V Replacement Kit for Logic 5.0 Operators

$79.93

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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 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 K23-10916 Interlock Switch 15A, 125/250VAC

$36.71

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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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Liftmaster K72-12789 Hand Chain Shaft Kit, GH

LiftMaster K72-12789 / K75-10884 Hand Chain Shaft Kit, GH

$235.87

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

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

A1: Common replacement parts for the LiftMaster HJ hoist jackshaft operator include Logic control boards, industrial-duty motors, limit switch assemblies, and contactors. Mechanical hardware such as drive chains, sprockets, and hoist components are also frequently replaced.

Q2: How can the correct replacement Logic control board be identified for the HJ model?

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

Q3: What should be done if the industrial-duty motor on the LiftMaster HJ fails?

A3: Replacing a high-voltage industrial motor involves managing complex electrical connections and heavy mechanical alignments. For safety and operational integrity, this procedure must be completed by a licensed electrician or a local qualified professional.

Q4: Are drive sprockets interchangeable between different jackshaft operators?

A4: Drive sprockets must match the exact shaft diameter, keyway dimensions, and torque specifications of the LiftMaster HJ operator. Always consult the manufacturer's parts diagram to select the correct mechanical sprocket to prevent system damage.

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

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

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

A6: The LiftMaster HJ requires continuous-monitoring safety peripherals, such as commercial photoelectric sensors or optical safety edges, to comply with UL 325 standards. Consult the manufacturer's installation manual to verify that replacement sensors communicate correctly with the logic board.

Q7: Can a damaged contactor block be repaired internally on the LiftMaster HJ?

A7: The contactor acts as a high-voltage relay transferring power to the motor and is not designed for internal repair. When the electrical contacts become pitted or fused from high-cycle commercial use, the entire contactor block must be replaced as a single unit.

Q8: What indicates that the manual hoist chain mechanism needs to be replaced?

A8: The manual hoist chain and internal engagement gears require replacement if they exhibit severe rust, binding, or if the interlock switch fails to engage properly. Refer to the manufacturer's technical documentation for accurate replacement part numbers.

Q9: Who is qualified to replace the internal friction clutch on the LiftMaster HJ?

A9: The internal friction clutch is a tension-loaded mechanism designed to protect the door hardware by allowing slippage during an obstruction. Servicing or replacing this critical safety component requires specialized knowledge and should only be performed by a local qualified technician.

Q10: What routine maintenance is recommended after installing new mechanical parts?

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

LiftMaster HJ Industrial-Duty Hoist Jackshaft Operator Replacement Parts

Products [43]

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

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

Q2: How can the correct replacement Logic control board be identified for the HJ model?

Q3: What should be done if the industrial-duty motor on the LiftMaster HJ fails?

Q4: Are drive sprockets interchangeable between different jackshaft operators?

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

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

Q7: Can a damaged contactor block be repaired internally on the LiftMaster HJ?

Q8: What indicates that the manual hoist chain mechanism needs to be replaced?

Q9: Who is qualified to replace the internal friction clutch on the LiftMaster HJ?

Q10: What routine maintenance is recommended after installing new mechanical parts?