The Multiquip 12125244510 Sub Reservoir 3Tne74-Amm T16 is a genuine OEM component designed for Whiteman hydrostatic ride-on power trowels including the STXD6i, HTXD6i, STX55J6, and STX55Y6 series. As a direct OEM replacement, part 12125244510 is produced to the same specifications as the original, ensuring a correct, confident installation every time. This part is sourced directly through authorized Multiquip supply channels and sold by DHS Equipment to keep your machine running at full capacity. Confirm your model code before ordering to ensure proper fitment with your specific trowel configuration.
Key Features
- Genuine OEM Construction — Manufactured to Multiquip's original design specifications for this Yanmar 3TNE74-AMM engine application, ensuring correct material grade and dimensional accuracy for the sub reservoir assembly.
- Direct Drop-In Replacement — Designed to install in the same position and connect to the same fluid lines as the original unit, with no rework or adaptation needed to the surrounding components.
- Broad Hydrostatic Trowel Coverage — Compatible with STXD6i, HTXD6i, STX55J6, and STX55Y6 Whiteman ride-on power trowels, covering both the STX super-sized and HTX heavy-duty hydrostatic series.
- Supports Stable Engine Cooling Performance — A properly functioning sub reservoir maintains consistent coolant volume in the system; a degraded or leaking reservoir can lead to coolant loss, overheating, and unplanned machine stoppages.
The sub reservoir in a liquid-cooled engine system acts as an overflow and expansion tank for engine coolant. As the engine heats up, coolant expands and moves into the reservoir; as it cools, the system draws that fluid back into circulation to maintain the correct operating level. On ride-on trowels like the STXD6i and STX55J6 that depend on the Yanmar 3TNE74-AMM engine running within tight thermal tolerances during extended finishing operations, a cracked, damaged, or deteriorated sub reservoir can cause coolant loss that goes undetected until the engine overheats. Replacing a worn reservoir promptly with the correct OEM part protects the engine and keeps the machine performing through full pours.
Part Details
| Part Number | 12125244510 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Sub Reservoir 3Tne74-Amm T16 |
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.
