APT5011 & APT501L5 Apartment Trolley Parts

LiftMaster APT5011 low profile apartment trolley operator replacement parts diagram

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

Ref Part # Description
K1 71-AB120 Solenoid-Brake, APT
K2 K72-13057 Clutch Shaft Kit, APT
K3 K72-13059 Output Shaft Kit, APT
K4 K75-13074 Straight and Curved Door Arm Kit, APT
K5 K72-13058 Intermediate Shaft Kit, APT
K22-36899 Brake Solenoid, 1PH, L5

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.

Model Volts Ph Circuit Part #
APT5011 115/230 1 Mech / Logic K20-1050B-2RLP
APT501L5 115/230 1 Logic 5.0 K20-1050B-2RLP-H24

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.

LiftMaster Logic Control 4.0 electrical box parts diagram for APT, T, GT, SD, GSD and GH

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
LiftMaster Logic Control 5.0 electrical box parts diagram for APT, T, GT, SD, GSD and GH

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
LiftMaster NEMA 4 and 4X electrical box parts diagram for APT, H, J, HJ, GH, GT and T

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