The Multiquip 68900305 is a genuine OEM Hose, 28.58 ID, 20R4, MT Radiator Upper designed for Whiteman hydrostatic ride-on power trowel models STXD6i, HTXD6i, STX55J6, and STX55Y6. As a direct OEM replacement, this hose is manufactured to the exact material grade, inner diameter, and pressure rating specified for these machines, ensuring a proper seal at every connection point. Sourced directly through authorized Multiquip supply channels, part number 68900305 is the correct service part when replacing a cracked, swollen, or deteriorating upper radiator hose on your trowel's cooling circuit. DHS Equipment stocks this genuine Multiquip component so you can get your machine back on the slab without delays.
Key Features
- OEM-Matched ID and Pressure Rating — Built to the specified 28.58 mm inner diameter and 20R4 hose classification, ensuring correct coolant flow volume and resistance to operating pressure without ballooning or collapsing.
- Correct Upper Radiator Position Fit — Engineered specifically as the upper radiator hose for the MT cooling circuit on these trowel models, connecting cleanly to the radiator inlet and engine outlet without trimming or adapter fittings.
- Confirmed Fitment for STXD6i, HTXD6i, STX55J6, and STX55Y6 — Verified against Multiquip's hydrostatic ride-on trowel series so you can order with confidence for the correct machine configuration.
- Maintains Stable Engine Operating Temperature — A properly functioning upper radiator hose keeps coolant circulating at the correct rate; a cracked or collapsed hose can cause overheating, which shuts down a ride-on trowel mid-pour at the worst possible time.
- Genuine Multiquip OEM Part — Supplied under the original Multiquip part number 68900305, manufactured to the same specification as the hose that left the factory, not a generic substitute.
The upper radiator hose carries hot coolant from the engine outlet to the top of the radiator, where heat is dissipated before the coolant returns to the engine. On a hydrostatic ride-on trowel like the STXD6i or HTXd6i, the engine works hard under continuous load, making a reliable cooling circuit essential to sustained operation. When this hose cracks, softens, or loses its seal at the clamp points, coolant escapes and engine temperature rises rapidly — leading to overheating, automatic shutdown, or engine damage if left unchecked.
For questions about fitment or to confirm this is the right part for your machine, contact the DHS Equipment parts team.
Part Details
| Part Number | 68900305 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Hose, 28.58 ID, 20R4, MT Radiator Upper |
Compatibility & Fitment
| Name | Model |
|---|---|
| Whiteman Ride-On Power Trowels | STXD6i |
| Whiteman Ride-On Power Trowels | HTXD6i |
| Whiteman Ride-On Power Trowels | STX55J6 |
| Whiteman Ride-On Power Trowels | STX55Y6 |
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.
