The Wacker Neuson Square Key is a genuine OEM component designed for the E3000, E2200, E1100, E1250, E5000, HSH350, HSH380, HSH650, HSH700G, S3000, Pureheat, and HHS series hydronic surface heaters and ground heaters. As a direct OEM replacement, the is manufactured to the exact material and dimensional specifications required by Wacker Neuson, ensuring a correct fit in the drivetrain assembly without guesswork or modification. This part covers an extensive range of hydronic heating equipment configurations, including ground heaters, surface heaters, lift-bail variants, and models paired with gas, diesel, or electric burner and generator options. When you need to restore proper shaft-to-component coupling in your heating system, the Wacker Neuson is the part to reach for.
Key Features
- Exact OEM Material Grade — Manufactured to Wacker Neuson's precise hardness and dimensional tolerances for square drive keys, ensuring full load transfer without slipping or deforming under operating torque.
- Drop-In Shaft Fit — Sized to seat directly into the keyway on compatible shafts and hubs across the hydronic heater line, aligning mating components without filing, shimming, or rework.
- Broad Hydronic Heater Compatibility — Fits E3000, E3000 ES, E2200, E1100, E1250, E5000, HSH350, HSH380S, HSH380B, HSH650, HSH700G, S3000, Pureheat, HHS series, and CH5000 cross heaters.
- Restores Positive Drive Coupling — A worn or missing square key causes shaft slippage, loss of pump or drive output, and accelerated wear on mating keyway surfaces; replacing it promptly protects surrounding drivetrain components.
- Genuine Wacker Neuson OEM Part — Sourced directly from Wacker Neuson, carrying the same part number used in original assembly, so you can confirm accuracy against your machine's parts diagram before ordering.
A square key is a small but critical drivetrain component that locks a rotating shaft to a hub, pulley, sprocket, or impeller so that torque is transmitted between them without slipping. It sits in a machined slot — called a keyway — cut into both the shaft and the mating bore, creating a positive mechanical connection. When a square key wears, shears, or goes missing, the shaft spins freely inside its mating component, resulting in a complete loss of drive to whatever that component powers — in a hydronic heater application, this typically means loss of pump or fan drive and a non-functional heating circuit. Replacing the key with the correct OEM piece restores the original interference fit and gets the machine back to full operation.
Part Details
| Part Number | 5000168292 |
|---|---|
| Old Part Number | 0168292 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Square Key |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| E3000 Hydronic Surface Heater with generator | E3000 | 5000620219, 5000620679, 5000620158, 5000620678, 5200014677, 5200004952, 5100017807, 5100017809, 5200014678, 5200014679, 5200014720, 5100017806, 5100017808, 5200014721, 5100017810, 5100017811, 5100025046, 5100055568, 5100056441, 5100017801, 5100056440, 5100025045 |
| HSH700 | HSH700G | 5000620243 |
| E2200 GROUND HEATER, W/ LIFT BAIL | E2200 | 5000620215, 5000620176, 5000620216, 5000620226, 5100017448, 5100017449 |
| E5000 GROUND HEATER, W/GAS BURNER | E5000 | 5000620898, 5000620897, 5000620899 |
| Hydronic Surface Heater | HSH350 | 5000620254, 5200001677 |
| HHS702 Hose Handling System | HHS702 | 5000620426 |
| Pureheat Hydronic Heater, Oil Burner | Pureheat | 5000620245, 5000620246, 5000620190 |
| E1250S | E1250S | 5200012355, 5200012354 |
| E1100 GROUND HEATER | E1100 | 5000620172, 5000620244, 5200001676 |
| E3000 ES Hydronic Surface Heater | E3000ES | 5000620968, 5000620967 |
| Hydronic Surface Heater w/ Gen erator, 3000 ft hose | S3000 | 5000620218, 5000620182 |
| E12540B | E1250B | 5200012353, 5200007613 |
| HSH650 | HSH650 | 5000620991 |
| HSH380s | HSH 380S | 5100054643 |
| E 1250P Hydronic Heater, Premium, Diesel | E1250P | 5200012357, 5200012356 |
| HSH380S-Diesel, with Generator | HSH380S | 5200012371, 5200012370 |
| HSH380B-Diesel, without generator | HSH380B | 5200012359, 5200007614 |
| Hydronic Surface Heater, 700m hose | E700M | 5000620195 |
| HHS2202 Hose Handling System | HHS2202 | 5000620423 |
| Hose Handling System | HHS2200 | 5000620418 |
| Hose Handling System | HHS3000 | 5000620419 |
| Hose Handling System | HHS700M | 5000620420 |
| Hose Handling System | HHS1101 | 5000620421 |
| HHS3002 Hose Handling System | HHS3002 | 5000620424 |
| HHS3004 Hose Handling System | HHS3004 | 5000620425 |
| HHS2502 Hose Handling System | HHS2502 | 5200003554 |
| Cross Heater with oil burner | CH5000 | 5000620240, 5000620242 |
| Hose Handling System | HHS1701 | 5000620422 |
| HHS1251 Hose Handling System | HHS1251 | 5200019011 |
Verify Before You Order
Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.
Why Buy From DHS Equipment
Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.
Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.
