The Multiquip EM69300001 Radiator Cap C30HDN is a genuine OEM component designed for STXD6i, HTXD6i, and WRS5200 series equipment, including Whiteman ride-on power trowels and ride-on roller screeds. As a direct OEM replacement, EM69300001 meets the original engineering specifications set for these machines, ensuring correct pressure rating and a proper seal every time. This cap is verified to fit STXD6i, HTXD6i, WRS5200DFPU, WRS5200, and WRSPUDF models, making it a straightforward service part for operators maintaining these units in the field.
Key Features
- Correct Pressure Rating — Engineered to the exact relief pressure spec for the cooling systems on STXD6i, HTXD6i, and WRS5200 series machines, preventing over- or under-pressurization of the coolant circuit.
- Genuine OEM Construction — Sourced directly from Multiquip, this cap uses the same sealing materials and valve tolerances as the original, so the cooling system maintains proper operating pressure from the first install.
- Direct-Fit Replacement — Designed to drop straight onto the factory radiator filler neck with no adaptation — the cap threads and sealing gasket match the OEM specification exactly.
- Broad Series Compatibility — Confirmed fitment across STXD6i, HTXD6i, WRS5200DFPU, WRS5200, and WRSPUDF, covering both hydrostatic ride-on trowels and ride-on roller screeds in the Multiquip lineup.
- Cooling System Integrity — A failed or worn radiator cap allows coolant loss and pressure drop, leading to overheating and potential engine damage. Replacing with the correct OEM cap restores the sealed, pressurized cooling circuit the engine depends on.
- Fuel and Coolant Safety — Maintaining the correct radiator cap pressure rating is a critical part of coolant system safety — an incorrect cap can cause coolant to boil over unexpectedly, creating a burn hazard for operators during servicing.
A radiator cap does more than seal the coolant reservoir — it regulates the pressure inside the cooling system, raising the boiling point of the coolant so the engine can operate at higher temperatures without overheating. When the system pressure exceeds the cap's rated threshold, the cap's relief valve opens to release excess pressure, then reseals as the engine cools. A cap that has lost its sealing ability or no longer holds the correct pressure allows coolant to escape, causes the engine to run hot, and can lead to costly engine damage if left unchecked.
Part Details
| Part Number | EM69300001 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Radiator Cap C30HDN |
Compatibility & Fitment
| Name | Model |
|---|---|
| Whiteman Ride-On Power Trowels | STXD6i |
| Whiteman Ride-On Power Trowels | HTXD6i |
| Ride-On Roller Screeds | WRS5200DFPU |
| Ride-On Roller Screeds | WRS5200 |
| Ride-On Roller Screeds | WRSPUDF |
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.
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