LiftMaster GH 5HP Replacement Parts — Heavy Industrial-Duty Gear-Reduced Hoist Operator
Genuine LiftMaster replacement parts for the GH 5 horsepower gear-reduced hoist operator. Use the exploded diagram to identify your part by its key number, then match it to the tables below.
The 5 HP GH is a different machine from the rest of the GH range. It has its own gear reducer, its own sprockets, its own chain wheel and hand chain shaft kits, and an electrical box that shares no parts with any other LiftMaster commercial operator. If your GH is 1/2 through 3 HP, you want our main GH parts page instead — nothing on this page will fit it.
Your model number is on the operator’s data label and reads GH5HP23M, GH5HP43M or GH5HP53M depending on voltage. The overload in the electrical box changes with the voltage, so check which one you have before ordering that part.
Models Covered
GH5HP23M (230V, 3PH), GH5HP43M (460V, 3PH), GH5HP53M (575V, 3PH) — all 5 HP
Replacement Parts
| Ref |
Part # |
Description |
| 1 |
09-17985 |
Stop Block, 32 Degrees (no longer available) |
| 2 |
09-17986 |
Stop Block, 0 Degrees (no longer available) |
| 3 |
09-17989 |
Wedge (no longer available) |
| 4 |
10-17940 |
E-Box Mounting Bracket (no longer available) |
| 5 |
15-48B18TKK |
Sprocket, 48B18T, 1-3/16" B x 5/16" |
| 6 |
15-100B15TKK |
Sprocket, 100B15T, 1-1/2" B |
| 7 |
23-10916 |
Interlock Switch, 125/250VAC, 15A, SPDT |
| 8 |
32-17914 |
Gear Reducer, 45:1, 5 HP |
| 12 |
50-18084 |
Mounting Bracket Kit (optional) |
| 12 |
K74-17966 |
Electrical Box — GH5HP43M (K-GH5HP43M) |
| 12 |
K74-17965 |
Electrical Box — GH5HP23M (no longer available) |
| 12 |
K74-18081 |
Electrical Box — GH5HP53M (no longer available) |
| — |
K75-18180 |
Motor Brake, 5 HP, 230/460V, 3PH |
| — |
K94-36990 |
Solenoid Wire Harness, 1PH, L5 |
| — |
K94-36989 |
Solenoid Wire Harness, 3PH, L5 |
Motor & Brake — B Group
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 — that is the most reliable way to order the right motor.
| Ref |
Part # |
Description |
| B5 |
20-3500C-4B |
Motor, 5 HP, 230/460V, 3PH, C-Face — GH5HP23M, GH5HP43M |
| B5 |
20-3500C-5B |
Motor, 5 HP, 575V, 3PH, C-Face, Brake — GH5HP53M |
| B1 |
10-17996 |
Brake Release Bracket (no longer available) |
| B2 |
10-17997 |
Brake Motor Release Arm (no longer available) |
| B3 |
10-18057 |
Motor, Brake Cover (no longer available) |
| B4 |
12-18074-1 |
Flange Bearing (no longer available) |
Chain Wheel & Clutch — C Group
| Ref |
Part # |
Description |
| C2 |
12-10883 |
Nyliner Bearing (K12-10883) |
| C3 |
75-10884 |
Chain Wheel Assembly (K72-12789) |
| C4 |
158A53 |
E-Ring, 3/4" (K158A0053) |
Hand Chain & Bevel Gear — H Group
| Ref |
Part # |
Description |
| H3 |
11-18051 |
Shaft |
| H4 |
K12-10029 |
Flange Bearing |
| H8 |
86-RP08-112 |
Roll Pin, 1/4" x 1-3/4" |
| H9 |
86-RP10-208 |
Roll Pin, 5/16" x 2-1/2" (K86-RP10-208) |
| H10 |
158A53 |
E-Ring, 3/4" (K158A0053) |
| H1 |
08-17694-1 |
Bevel Gear (no longer available) |
| H2 |
08-17695-1 |
Bevel Gear (no longer available) |
| H5 |
18-9301 |
Compression Spring (no longer available) |
| H6 |
31-18053 |
Spacer (no longer available) |
| H7 |
86-DP06-104 |
Dowel Pin, 3/16" dia x 1.25" (no longer available) |
Safety Draw-Bar — R and S Groups
| Ref |
Part # |
Description |
| S2 |
19-17160 |
Sash Chain, 12 ft (K19-17160) |
| S5 |
96-3575 |
Braided Cable |
| R6 |
85-FW-31 |
Flat Washer for 5/16" bolt |
| R1 |
18-18190 |
Safety Draw-Bar Extension Spring (no longer available) |
| R2 |
80-11646 |
Double Sleeve (no longer available) |
| R4 |
82-18077 |
Hex Bolt, modified (no longer available) |
| R7 |
96-3575 |
Braided Cable (no longer available) |
| S1 |
18-13343 |
Safety Draw-Bar Extension Spring (no longer available) |
| S4 |
80-11646 |
Double Sleeve (no longer available) |
Service Kits
| Ref |
Part # |
Description |
| K1 |
K09-17987-1 |
Engagement Lever Kit |
| K2 |
K75-18323 |
Chain Wheel Kit |
| K3 |
K75-13344 |
Chain / Brake Release Kit |
| K4 |
K75-18324 |
Hand Chain Shaft Kit |
| K5 |
K75-17997 |
Brake Kit Release Arm |
| K6 |
K75-18075 |
Chain / Cable Sash Kit (no longer available) |
Electrical box parts. The 5 HP GH uses a dedicated mechanical control box built around a DIN-rail contactor and a thermal overload sized to the motor voltage. It shares no parts with the Logic 4.0, Logic 5.0, NEMA 4 or contactor-style boxes fitted to the rest of the LiftMaster commercial range.
Electrical Box — Mechanical Operators
| Ref |
Part # |
Description |
| 1 |
03-8224D |
Contactor |
| 2 |
03-ABDIN-4 |
DIN Rail, 4" (no longer available) |
| 3 |
K21-3460-1 |
Transformer, 230/460V primary, 24V secondary — GH5HP23M |
| 3 |
21-3575-1 |
Transformer, 575V primary, 24V secondary — GH5HP43M, GH5HP53M |
| 4 |
24-24-1 |
Relay, 24V, 10A |
| 5 |
24-264-1 |
Relay, 24V DC, DPST |
| 6 |
25-4018-D |
Overload, 12–18A — GH5HP23M |
| 6 |
25-4010-D |
Overload, 7.0–10.0A — GH5HP43M |
| 6 |
25-4008-D |
Overload, 5.5–8.0A — GH5HP53M |
| 7 |
27-8002-D |
Auxiliary Contact Block Relay, 1NO/1NC |
| 8 |
35-204 |
Fuse, 125V, 4A |
| 9 |
K42-114 |
Terminal Block, 14 position, 600V, 30A |
| L |
K74-18346 |
Limit Shaft Kit |
| L1 |
11-10480 |
Limit Shaft |
| L2 |
13-10024 |
Limit Nut |
| S |
K72-18345 |
Limit Switch Kit (no longer available) |
| S1 |
K23-10041 |
Limit Switch, SPDT, 10A, 125/250VAC |
Safety Sensors & Accessories
| Part # |
Description |
| CPICARD |
CPI interface box |
| CPS-U |
Commercial photo eye |
| CPSUN4G |
Monitored through-beam photo eyes |
| CPS |
Safety eye sensors — mechanical operators |
| CPS-UN4 |
Safety eye sensors — commercial doors |
| K77-16011 |
Mounting hardware, CPS N4 |
| 65-5302 |
Pneumatic sensing edge, 22 ft, with take-up reel |
| LC-36A |
Safety eye sensors (no longer available) |