The Multiquip 21140 Pulley AK-54 X 3/4 is a genuine OEM component designed for Whiteman and International walk-behind power trowel models including B46, BS90C, BH11C, BH90C, BS46H11, BS46H90, JS36H90, JS36H55, and B46S90. As a direct OEM replacement, part 21140 is manufactured to the exact dimensional and mechanical specifications of the original, ensuring a drop-in fit on compatible trowel drive systems. Sourced directly through authorized Multiquip distribution, this pulley delivers the same service life and performance characteristics as the part it replaces. DHS Equipment stocks genuine Multiquip parts so you can get the right component and get your trowel back to work without guesswork.
Key Features
- Exact OEM Groove and Bore Spec — AK-54 X 3/4 sizing matches the original pulley profile precisely, so belt engagement and alignment are maintained as designed.
- Direct Drive Compatibility — Mounts directly to the trowel's drive shaft without modification, preserving correct belt tension and rotational geometry.
- Broad Whiteman and International Trowel Fitment — Confirmed fit across B46, BS90C, BH11C, BH90C, BS46H11, BS46H90, JS36H90, JS36H55, and B46S90 walk-behind trowel models.
- Consistent Power Transfer — A correctly sized pulley keeps belt slip and wear in check, maintaining steady blade speed and trowel output across the full operating range.
- Genuine Multiquip OEM Part — Produced to the same standards as the original production component, not a generic substitute, so fit and function are not a concern.
The drive pulley on a walk-behind power trowel transfers rotational power from the engine to the belt-and-blade drive system, controlling how smoothly and consistently the finishing blades spin. If the pulley wears, cracks, or develops groove damage, belt slippage increases, blade speed becomes inconsistent, and the trowel loses the smooth, controlled action needed to produce a quality concrete finish. Replacing a worn pulley with the correct OEM-spec unit — properly sized at AK-54 X 3/4 — restores proper belt seating and keeps the drive system operating as intended.
Need help confirming this part fits your machine? Contact the DHS Equipment parts team with your model and serial number and we'll verify compatibility before you order.
Part Details
| Part Number | 21140 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Pulley AK-54 X 3/4 |
Compatibility & Fitment
| Name | Model |
|---|---|
| Whiteman Walk-Behind Power Trowels | B46 |
| International Walk-Behind Power Trowels | BS90C |
| Whiteman Walk-Behind Power Trowels | BH11C |
| Whiteman Walk-Behind Power Trowels | BH90C |
| International Walk-Behind Power Trowels | BS46H11 |
| International Walk-Behind Power Trowels | BS46H90 |
| International Walk-Behind Power Trowels | JS36H90 |
| International Walk-Behind Power Trowels | JS36H55 |
| Whiteman Walk-Behind Power Trowels | B46S90 |
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.
