LiftMaster APT5011 Replacement Parts — Low Profile Apartment Trolley Operator
Genuine LiftMaster replacement parts for the APT low profile apartment trolley operator. The APT5011 is the standard version — 1/2 HP, 115/230V, single phase. Use the exploded diagram to identify your part by its key number, then match it to the tables below.
Unlike the T and GT series, the APT is built in one horsepower only, so there is no voltage or phase variation to sort out — the differences between units are the control generation and the intermediate shaft drive. The APT’s low-profile chassis uses its own chain tension kit, slider assembly and intermediate shaft kit, none of which interchange with the standard-duty T.
Models Covered
APT5011 (1/2 HP, 115/230V, 1PH), APT5011L3 (Logic 3.0 / 4.0 control), APT501L5 (Logic 5.0 control)
Replacement Parts
| Ref |
Part # |
Description |
| 1 |
K22-120 |
Brake Solenoid, 120V |
| 1 |
K22-36899 |
Brake Solenoid, 1PH, L5 |
| 2 |
K75-12796 |
Motor Brake Pulley |
| 3 |
K10-10166 |
Clutch Plate |
| 4 |
K11-10014 |
Clutch Shaft |
| 5 |
K12-729 |
Bearing, 3/4" |
| 6 |
K15-41B10G1 |
Sprocket, 41B10T, 3/4" B |
| 7 |
K16-5L300 |
V Belt, 5L300 |
| 8 |
K17-10165 |
Pulley, 7" |
| 9 |
K18-10164 |
Clutch Spring, 1/3 HP, 1/2 HP |
| 10 |
K39-10167 |
Clutch Disc |
| 11 |
K87-P-075 |
Push Ring |
| 12 |
K12-10331 |
Flange Bearing, 3/4" x 1-1/2" x 1/8" |
| 13 |
K15-41B32GXX |
Sprocket, 41B32T, 3/4" B |
| 14 |
K15-41B16GXX |
Sprocket, 41B16T, 3/4" B |
| 15 |
K19-41047 |
Chain, #41 x 47, No ML |
| 16 |
K19-48033M |
Chain, #48 x 33, with ML |
| 17 |
K75-10388 |
Chain Tension Kit, APT |
| 18 |
K75-10387 |
Slider Assembly, APT |
| 19 |
K75-10388 |
Chain Tension Kit, APT |
| 20 |
K75-10259 |
Track Spacer Kit |
| 21 |
K10-10205 |
Header Bracket |
| 22 |
K75-10406 |
Drive Chain Kit, APT |
| 23 |
K20-1050B-2RLP |
Motor, 1/2 HP, 115/230V, 1PH, BM |
| 24 |
K10-10187 |
Brake Solenoid Cover |
| 25 |
K19-48001 |
Chain, #48 x 1, No ML |
| 26 |
K86-CP04-112 |
Cotter Pin, 1/8" x 1-3/4" |
| 27 |
18-10716 |
Compression Spring |
| 28 |
K11-10193 |
Spring Cup |
| 29 |
K31-10186 |
Spacer |
| — |
K94-36992 |
Brake Cable Harness, 1PH, L5 |
| — |
K94-36994 |
Brake Cable Harness, 3PH, L5 |
Service Kits
Motor Replacement Kits
The motor’s part number is printed on the motor’s own data label. If you can reach it, read the number straight off the label and match it below — that is the most reliable way to order the right motor. If the label is unreadable, use your operator model number instead.
Electrical box parts. The APT shipped with Logic Control 4.0 and later Logic Control 5.0, and was also offered in a NEMA 4/4X enclosure for wash-down and outdoor installations. It was never built with the contactor-style box. Use the section that matches your unit.
Electrical Box — Logic Control 4.0
| Ref |
Part # |
Description |
| 1 |
K13-10024 |
Limit Nut |
| 2 |
K23-10041 |
Limit Switch, SPDT, 10A, 125/250VAC |
| 3 |
K75-35627 |
E-Box Cover — GH, GT, T, GSD |
| 4 |
K21-14182 |
Transformer, 120/240V, 24VAC, 20VA |
| 4 |
K21-35057 |
Transformer, 460V, 24VAC |
| 4 |
K21-35077 |
Transformer, 575V, 24VAC |
| 5 |
K29-31244 |
Relay, DPST, 24V, 30A |
| 5 |
K29-31245 |
Relay, 12V, 30A |
| 6 |
K29-31229 |
Relay, 24VDC, 30A, SPDT, 1PH |
| 7 |
K74-31243 |
MOV Kit, L5, 1PH/3PH |
| 8 |
K79-15016-1 |
RPM Sensor Kit |
| 9 |
K001A6837 |
Logic Board, L4 |
| 10 |
K002A0761 |
Receiver Coaxial Cable, 315MHz |
| 11 |
K001C3196-3 |
Antenna, 315MHz |
| 12 |
K42-31247 |
Terminal Block, 3 Position, 600V, 20A |
| 13 |
K42-10040 |
Terminal Block, 3 Position |
| — |
K74-MODELH |
Main Wire Harness |
| K1 |
K72-10047 |
Limit Shaft Assembly Kit, T, APT, SD, GH |
| K1 |
K72-10047-1 |
Limit Switch Shaft Kit |
| K2 |
K72-12515-1 |
Limit Switch Kit |
Electrical Box — Logic Control 5.0
| Ref |
Part # |
Description |
| 1 |
K13-10024 |
Limit Nut |
| 2 |
K23-10041 |
Limit Switch, SPDT, 10A, 125/250VAC |
| 3 |
K75-36914 |
Cover for Current Sense Kit — GT, GH, L5 |
| 4 |
K21-14182 |
Transformer, 120/240V, 24VAC, 20VA |
| 4 |
K21-36793 |
Transformer, 208/230/460V, 20VA |
| 4 |
K21-35077 |
Transformer, 575V, 24VAC |
| 5 |
K74-31243 |
MOV Kit, L5, 1PH/3PH |
| 6 |
K79-15016-1 |
RPM Sensor Kit |
| 7 |
K001D8395MC |
Logic Board, 1PH/3PH, Current Sense Ready L5 |
| 8 |
K002A0761 |
Receiver Coaxial Cable, 315MHz |
| 9 |
K001C8103-1 |
Antenna |
| 10 |
K001D8396-1 |
Power Board, 115/230V, 1PH, L5 |
| 10 |
K001D8397 |
Power Board Kit, 3PH, L5 |
| 10 |
K001D8397-1 |
Power Board Kit, 575V, L5 |
| 11 |
K21-38158 |
Current Sense Harness, 3PH, L5 |
| — |
K94-36934 |
Main Wiring Harness, L5 |
| K1 |
K72-10047 |
Limit Shaft Assembly Kit, T, APT, SD, GH |
| K1 |
K72-10047-1 |
Limit Switch Shaft Kit |
| K2 |
K72-12515-1 |
Limit Switch Kit |
Electrical Box — NEMA 4 / 4X
| Ref |
Part # |
Description |
| 1 |
K03-35711 |
Contactor Relay, 24V, 2NO+2NC |
| 2 |
K21-7115-1 |
Transformer, 115/230V, 1PH |
| 2 |
K21-7460 |
Transformer, 240/480V, 3PH |
| 2 |
K21-7460-1 |
Transformer, 230/460V, 3PH |
| 2 |
K21-7575 |
Transformer, 575V, 24VAC |
| 2 |
21-7575-1 |
Transformer, 575V, 3PH |
| 3 |
K001A6837 |
Logic Board, L4 |
| 4 |
K52C0481 |
Bridge Rectifier Kit |
| 5 |
K74-31243 |
MOV Kit, L5, 1PH/3PH |
| 6 |
K42-31247 |
Terminal Block, 3 Position, 600V, 20A |
| 7 |
K23-10041 |
Limit Switch, SPDT, 10A, 125/250VAC |
| 8 |
K72-12515-1 |
Limit Switch Kit |
| 9 |
K13-10024 |
Limit Nut |
| 10 |
K79-15016-1 |
RPM Sensor Kit |
| 11 |
K72-33192 |
Limit Shaft Kit |
| 12 |
K75-35815 |
Enclosure, 1PH, N4 |
| 12 |
K75-35816 |
Enclosure, 3PH, N4 |
| 13 |
K29-ABC-2 |
Fuse, 250V, 2A |
| 14 |
K74-19499 |
Antenna |
| 15 |
AUXCARD |
Option Card Aux Relay Kit |