The Multiquip 42628-1 Coupler Rexroth Pump is a genuine OEM component designed for HTX6H and STX6H hydrostatic ride-on power trowels. As a direct OEM replacement, this coupler is manufactured to the exact specifications required by these machines, ensuring proper alignment and torque transfer between the engine and the Rexroth hydraulic pump. Confirmed fitment covers the HTX6H heavy-duty hydrostatic series and the STX6H super-sized hydrostatic series — verify your model before ordering to ensure correct application.
Key Features
- Genuine OEM Construction — Manufactured to Multiquip's original specifications, delivering the precise dimensional tolerances needed for correct engagement with the Rexroth hydraulic pump assembly.
- Direct-Fit Replacement — Installs in the same position and orientation as the original coupler, with no machining or adaptation required to mate with existing drive and pump interfaces.
- Confirmed Hydrostatic Trowel Fitment — Compatible with HTX6H and STX6H hydrostatic ride-on power trowels, covering both the heavy-duty and super-sized hydrostatic series.
- Hydraulic System Integrity — A correctly functioning coupler maintains positive, slip-free power transfer to the hydraulic pump, supporting consistent blade pitch control and smooth machine drive response.
- Hydraulic Safety Relevance — A worn or failed coupler can cause erratic hydraulic pressure, loss of blade control, or unintended machine movement — replacing it promptly keeps the operator in control of the trowel at all times.
The coupler on a hydrostatic ride-on trowel connects the engine's output shaft to the Rexroth hydraulic pump, transferring rotational power to drive the machine's hydraulic system. That hydraulic system governs both the blade pitch adjustment and the ground drive, making this coupler a critical link in the machine's operation. When the coupler wears, cracks, or fails, the hydraulic pump loses consistent input power — resulting in sluggish or unpredictable blade response, reduced drive performance, and potential hydraulic system damage if left unaddressed.
Part Details
| Part Number | 42628-1 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Coupler Rexroth Pump |
Compatibility & Fitment
| Name | Model |
|---|---|
| Whiteman Ride-On Power Trowels | HTX6H |
| Whiteman Ride-On Power Trowels | STX6H |
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.
