HJ Model Jackshaft Operator Parts - Prior to 2005
LiftMaster HJ Replacement Parts — Industrial-Duty Hoist/Jackshaft Operator, Prior to 2005
Genuine replacement parts for the pre-2005 HJ series industrial-duty hoist/jackshaft operator. These are the original side-plate frame machines built before LiftMaster redesigned the HJ in 2005. Use the exploded diagram to identify your part by its key number, then match it to the tables below.
Check your build date before ordering. The pre-2005 HJ uses different side plates and a different clutch shaft from the current machine, and the parts do not interchange. If your operator was built in 2005 or later, use our HJ5011 & All HJ Series page instead.
The HJ is handed. Its disconnect assembly is built as a right-hand or a left-hand unit, and the two are listed separately below. The individual part numbers are common to both sides, but the assembly kits are not — order K72-12558 for a right-hand machine and K72-12560 for a left-hand one.
Old numbers and current numbers. Many of these parts were renumbered with a K prefix when LiftMaster reorganised its catalog. We show the number stamped on the old part and note the current number beside it. Either one gets you the right item.
Models Covered
HJ501L5 (1/2 HP) and all pre-2005 HJ industrial-duty hoist/jackshaft operators
Main Assembly
| Ref | Part # | Description |
|---|---|---|
| 01 | 10-10871 | Motor Plate |
| 02 | 75-15012E | Side Plate, Left Hand (now K75-15012E) |
| 03 | 75-15013E | Side Plate, Right Hand (now K75-15013E) |
| 04 | 10-10874 | Frame Connecting Bracket |
| 05 | 17-6014 | Motor Pulley (now K17-6014) |
| 05 | 15-50B12LGH | Sprocket, 50B12 x 1" Bore |
| 06 | K20-1075B-2P | Motor, 3/4 HP |
| 09 | 28-10219 | Connector, 90 Degree |
Clutch Shaft Group
| Ref | Part # | Description |
|---|---|---|
| C1 | K10-10166 | Clutch Plate |
| C4 | 11-15606 | Clutch Shaft — pre-2005 HJ only |
| C5 | 12-10715 | Flange Bearing, 1" ID (now K12-10715) |
| C6 | 12-10882 | Bushing, .753" ID x 5/8" (now K12-10882) |
| C7 | 12-10883 | Nyliner Bearing (now K12-10883) |
| C8 | 15-10885 | Idler Sprocket Assembly, 48B32/48B14 (now K15-10885) |
| C10 | K16-5L304 | V Belt, 5L x 30.4" |
| C11 | K17-10165 | Pulley, 7" |
| C12 | 18-10168 | Compression Spring, Clutch (now K18-10168) |
| C13 | 18-10931 | Compression Spring, Disconnect (now K18-10931) |
| C14 | 18-11379 | Compression Spring, Hoist (now K18-11379) |
| C15 | 19-48047M | Chain, #48 x 47P with Master Link (now K19-48047M) |
| C16 | K39-10167 | Clutch Pad |
| C17 | 75-10884 | Chain Wheel Assembly (now supplied as kit K72-12789) |
| C19 | 80-207-19 | Key, 1/4" x 1/4" x 1-1/2" |
| C20 | 80-PX10-28 | Screw, #10-32 x 3", Slotted Round Head |
| C21 | 84-SH-76 | Castle Nut, 3/4"-16 (now K84-SH-76) |
| C22 | 86-RP08-200 | Roll Pin, 1/4" x 2" (now K86-RP08-200) |
| C23 | K86-RP10-208 | Roll Pin, 5/16" x 2-1/2" |
| C24 | 87-E-100 | E-Ring, 1", Plated (now K158A0056) |
| C25 | 87-E-150 | External Snap Ring, Zinc Plated |
Output Shaft Group
| Ref | Part # | Description |
|---|---|---|
| O1 | K11-10879 | Output Shaft |
| O2 | 15-10885 | Sprocket Assembly, 48B32/48B14 (now K15-10885) |
| O3 | K15-48B32LXX | Sprocket, 48B32 (no longer available) |
| O4 | 15-48B18LGE | Sprocket, #48B18 x 1" Bore |
| O6 | 19-48047M | Drive Chain, #48 x 47P with Master Link (now K19-48047M) |
| O7 | 80-207-19 | Key, 1/4" x 1/4" x 1-1/2" |
| O8 | 87-E-100 | E-Ring, 1", Plated (now K158A0056) |
| O10 | K12-10891 | Flange Ball Bearing |
Disconnect Group — Right Hand
| Ref | Part # | Description |
|---|---|---|
| R1 | 10-10707 | Disconnect Support Bracket |
| R2 | 10-10708 | Yoke |
| R3 | 10-10875 | Disconnect Lever (no longer available) |
| R4 | 10-10898 | Interlock Switch Actuator |
| R5 | 11-10878 | Disconnect Shaft |
| R6 | 19-8A-12 | Sash Chain, 12' (now 71-199010) |
| R7 | 86-RP04-100 | Roll Pin, 1/8" x 1" (now K86-RP04-100) |
Disconnect Group — Left Hand
| Ref | Part # | Description |
|---|---|---|
| L1 | 10-10707 | Disconnect Support Bracket |
| L2 | 10-10708 | Yoke |
| L3 | 10-10875 | Disconnect Lever (no longer available) |
| L4 | 10-10898-L | Interlock Switch Actuator, Left Hand |
| L5 | 11-10878 | Disconnect Shaft |
| L6 | 19-8A-12 | Sash Chain, 12' (now 71-199010) |
| L7 | 86-RP04-100 | Roll Pin, 1/8" x 1" (now K86-RP04-100) |
Service Kits
Where a whole sub-assembly has worn, these kits supply the group complete and are usually the better buy. The disconnect kits are handed — check which side your operator is built for before ordering.
| Ref | Part # | Description |
|---|---|---|
| — | K72-12556 | Clutch Shaft Assembly Kit |
| — | K72-12557 | Output Shaft Kit |
| — | K72-12558 | Disconnect Assembly Kit, Right Hand |
| — | K72-12560 | Disconnect Assembly Kit, Left Hand |
| — | K71-EB1PH | Internal Brake Solenoid, 115/230V, 1PH (now K71-D1PH) |
Electrical Box — Which One Do I Have?
Pre-2005 HJ operators shipped with one of three control generations. Open the box and look at what is inside — that tells you which parts list to use. The three share very little.
| What you will see inside | Use this section | |
|---|---|---|
| — | A contactor and a thermal overload. No circuit board of any kind. | Contactor Style — the oldest |
| — | A contactor and overload, plus a small RPM sensor board. Still no logic board. | Logic Version 2 |
| — | A full green logic board with a coaxial antenna lead and plug-in relays. | Logic Version 3 — the newest pre-2005 |
Units built in 2005 or later use Logic 4.0 or Logic 5.0 and are covered on our HJ5011 & All HJ Series page.
Electrical Box — Contactor Style (Mechanical)
The original control, with no logic board at all. The overload must match your motor’s full-load amps — read the amp rating off the motor data label and pick the band that contains it. Fixed-value overloads are listed first, adjustable ones after.
| Ref | Part # | Description |
|---|---|---|
| 1 | K03-8024-K | Mini Contactor, 24V |
| 2 | 10-10020M1 | E-Box — H, J, T |
| 3 | 10-10115X | E-Box Cover (now K75-10128) |
| 3 | K75-10128 | E-Box Cover, Low Profile |
| 3 | 10-13899 | E-Box Cover, Cube (now K75-14347) |
| 4 | 21-5115 | Transformer, 115V (now K21-5115) |
| 4 | 21-5230 | Transformer, 230V (now K21-5230) |
| 4 | K21-5460 | Transformer, 380-460V |
| 5 | 23-10916 | Interlock Switch, SPDT (now K23-10916) |
| 6 | 24-24-1 | Relay, 24VAC, DPDT (now K24-24-1) |
| 7 | 24-115-1 | Relay, 115V (now K24-115-1) |
| 7 | 24-230-5 | Relay, 230V (now K24-230-5) |
| 8 | 25-2006 | Overload, 6A (now K25-2006) |
| 8 | 25-2008 | Overload, 8A (now K25-2008) |
| 8 | 25-2010 | Overload, 10A (now K25-2010) |
| 8 | 25-2015 | Overload, 15A (now K25-2015) |
| 8 | 25-2020 | Overload, 20A (now K25-2020) |
| 9 | 25-4002-5K | Overload, adjustable 1.6-2.5A (now K25-4002-5K) |
| 9 | 25-4004-K | Overload, adjustable 2.5-4.0A |
| 9 | 25-4003-K | Overload, adjustable 2.6-3.7A (now K25-4003-K) |
| 9 | 25-4008-K | Overload, adjustable 5.5-8.0A |
| 9 | 25-4011-5K | Overload, adjustable 8.0-11.5A |
| 10 | 42-10040 | Terminal Block, Radio (now K42-10040) |
| 11 | K42-110 | Terminal Block, 10 Position |
| 12 | 25-3000-K | Overload Bracket |
| L1 | 11-10021 | Limit Shaft (now K11-10021) |
| L3 | K13-10024 | Limit Nut |
| S3 | K23-10041 | Limit Switch |
| — | K72-12510 | Limit Shaft Kit |
| — | K75-12511 | Limit Switch Assembly |
| — | 71-2954029 | Light Delay Kit |
Electrical Box — Logic Control Version 2
The intermediate control — still a contactor and overload, but with an RPM sensor board added. Match the overload to your motor’s full-load amps as above.
| Ref | Part # | Description |
|---|---|---|
| 1 | 10-13790 | E-Box |
| 1 | 10-13792 | E-Box, Cube (no longer available) |
| 2 | 10-10115 | E-Box Cover (now K75-10128) |
| 2 | 10-13899 | E-Box Cover, Cube (now K75-14347) |
| 3 | 21-14182 | Transformer, 115/230V (now K21-14182) |
| 3 | K21-5460 | Transformer, 460V |
| 4 | 25-13842 | Overload, 1.4-2.0A (no longer available) |
| 4 | 25-13840 | Overload, 2.0-3.0A |
| 4 | 25-10296 | Overload, 2.8-4.4A |
| 4 | K25-2006 | Overload, 6A |
| 4 | K25-2008 | Overload, 8A |
| 4 | 25-2010 | Overload, 10A (now K25-2010) |
| 4 | 25-2015 | Overload, 15A (now K25-2015) |
| 4 | K25-2020 | Overload, 20A |
| 6 | K42-10040 | Terminal Block |
| 7 | K79-15016-1 | RPM Sensor Assembly |
| A1 | K23-10916 | Interlock Switch |
| L1 | 11-10021 | Limit Shaft (now K11-10021) |
| L1 | K11-13361 | Limit Shaft |
| L3 | K13-10024 | Limit Nut |
| S5 | K23-10041 | Limit Switch |
| — | 03-8024-D | Contactor |
| — | 75-12514 | Limit Switch Kit, S1-S7 (now K72-12515-1) |
| — | 71-2954029 | Light Delay Kit |
Electrical Box — Logic Control Version 3
The last pre-2005 control, and the first with a true logic board.
| Ref | Part # | Description |
|---|---|---|
| 1 | K75-32269 | E-Box Cover |
| 2 | 21-14182 | Transformer, 115/230V (now K21-14182) |
| 2 | K21-35057 | Transformer, 460V |
| 2 | 21-35077 | Transformer, 575V (now K21-35077) |
| 3 | 29-31244 | Relay, 24VDC, DPST — A and B relay (now K29-31244) |
| 4 | 29-31229 | Relay, 24VDC, SPDT — C relay, single phase only (now K29-31229) |
| 4 | 29-31245 | Relay, 12VDC, SPDT — C and D relay, three phase only (now K29-31245) |
| 5 | K74-31243 | MOV, 508V |
| 6 | K79-15016-1 | RPM Sensor Assembly |
| 7 | K001A5729 | Logic Board, L3 (no longer available) |
| 8 | K2A761 | Receiver Coaxial Cable (now K002A0761) |
| 9 | K001C3196-3 | Antenna, 315MHz |
| 10 | K13-10024 | Limit Nut |
| 11 | K23-10041 | Limit Switch, SPDT |
| 11 | K23-10041-1 | Limit Switch, Double Pole |
| 12 | 42-31247 | Terminal Block (now K42-31247) |
| 13 | K42-10040 | Terminal Block, Radio |
| K1 | K72-14130-1 | Limit Shaft Kit |
| K2 | K72-12515-1 | Limit Switch Kit |
| — | K74-MODELH | Main Wiring Harness |
Not sure which part you need? Send us the number stamped on the old part along with your operator's model and serial number and we will confirm the current equivalent before you order.