The Multiquip 68900143SRF Lower Radiator Hose is a genuine OEM component designed for the STX55J6 and STX55Y6 super-sized hydrostatic ride-on power trowels. This hose is sourced directly through Multiquip and meets the original equipment specifications for the 4TNV84TDSA and 3TNV engine cooling systems used in these machines. Choosing the correct OEM hose ensures a proper seal at both connection points and maintains the integrity of the engine cooling circuit. Confirm your model code against STX55J6 or STX55Y6 before ordering to ensure accurate fitment.
Key Features
- Genuine OEM Cooling System Integrity — Manufactured to the same material grade and wall thickness as the original, ensuring correct coolant flow volume and pressure retention for the 4TNV84TDSA and 3TNV engine families.
- Direct-Fit Routing and Connection — Molded to match the original hose path and end diameters, seating flush against the lower radiator port and engine block inlet without trimming or adapting.
- Confirmed Fitment for STX55 Series Trowels — Verified for STX55J6 and STX55Y6 hydrostatic ride-on trowels, helping you order with confidence by matching your machine's model code.
- Prevents Overheating During Extended Finishing Runs — A cracked or collapsed lower radiator hose restricts coolant return from the engine, causing rapid temperature spikes that can result in engine shutdown mid-pour. This OEM hose restores full cooling loop performance.
- Fuel System Safety Relevance — Maintaining a sealed, correctly routed cooling circuit protects surrounding fuel and hydraulic lines from heat-related degradation, which is especially critical in the compact engine bay of a ride-on trowel.
The lower radiator hose carries cooled coolant from the bottom of the radiator back to the engine water pump, completing the engine cooling loop. Without a properly functioning lower hose, coolant circulation is interrupted, causing the engine to overheat quickly — particularly under the sustained load of a ride-on trowel finishing large concrete slabs. A hose that has cracked, swollen, or collapsed at the inner wall will reduce flow even if it appears intact from the outside, making periodic inspection and timely replacement essential to keeping the engine running within its safe operating temperature range.
Part Details
| Part Number | 68900143SRF |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Lower Radiator Hose |
Compatibility & Fitment
| Name | Model |
|---|---|
| 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.
