GH 5HP Heavy Industrial Gear-Reduced Hoist Parts

LiftMaster GH 5HP heavy industrial-duty gear-reduced hoist operator replacement parts diagram

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.

LiftMaster GH 5HP mechanical operator electrical box parts diagram

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)