The Multiquip 0204102190 Key ST-4100 is a genuine OEM key designed for the ST-4100 swing tube concrete pump. As a direct Multiquip OEM component, this key is manufactured to the exact specifications required to maintain correct mechanical engagement within the ST-4100's drivetrain. Sourcing the correct OEM key ensures the mating shaft and hub components seat and lock exactly as intended, keeping the pump operating as designed. Verify your model against the ST-4100 before ordering to confirm fitment.
Key Features
- Genuine OEM Construction — Manufactured by Multiquip to the exact dimensional tolerances required for secure shaft-to-hub locking in the ST-4100 concrete pump.
- Direct Drop-In Replacement — Machined to match the original keyway geometry, so the key seats fully into the slot without filing, shimming, or rework.
- Confirmed ST-4100 Fitment — Specific to the ST-4100 swing tube concrete pump; cross-reference your model code before purchasing.
- Prevents Slippage and Power Loss — A correctly sized key locks rotating components together and transfers drive force cleanly; a worn or undersized key allows slippage that accelerates damage to both shaft and hub.
- Exact OEM Part Number — Ordering 0204102190 ensures you receive the correct key profile for this application, eliminating guesswork when sourcing a replacement.
A key is a small but critical mechanical component seated in a machined slot — called a keyway — between a shaft and a rotating hub, such as a gear, pulley, or coupling. Its job is to lock those two components together rotationally so that drive torque transfers cleanly from one to the other. When a key wears down, shears, or goes missing entirely, the shaft spins freely inside the hub, causing an immediate loss of power transmission and potential damage to the keyway surfaces on both mating parts. Replacing a worn key promptly protects the surrounding components from the accelerating wear that results from metal-on-metal slippage.
Part Details
| Part Number | 0204102190 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Key ST-4100 |
Compatibility & Fitment
| Name | Model |
|---|---|
| ST-4100 | ST-4100 |
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.
