The Multiquip 21513 Filter Breather 10 Micron 1/4MP Plastic is a genuine OEM component designed for HTX44 and STX55 series hydrostatic ride-on power trowels. As a direct factory replacement, part 21513 maintains the exact filtration specification required by these machines, ensuring the hydraulic or venting system operates within designed parameters. Confirmed fitment includes HTX44K4, HTX44K5, HTX44Y4, HTX44Y5, HTXD6i, STX55J6, STX55Y6, and STXD6i models.
Key Features
- 10-Micron Filtration Accuracy — Filters particulates to a 10-micron rating, keeping contaminants out of the breather circuit and protecting downstream components.
- 1/4MP Plastic Threaded Fitting — The 1/4 male pipe plastic fitting threads directly into the existing port with no adapters or modification needed.
- Genuine OEM Quality — Sourced directly from Multiquip, this part meets the exact material and dimensional specifications of the original component installed at the factory.
- Broad HTX and STX Series Coverage — Fits HTX44K4, HTX44K5, HTX44Y4, HTX44Y5, HTXD6i, STX55J6, STX55Y6, and STXD6i ride-on trowels in a single part number.
- Protects System Integrity — A failed or clogged breather can cause pressure imbalances in the hydraulic system, leading to sluggish blade response or accelerated wear on seals and actuators.
A filter breather allows air to enter or exit a hydraulic reservoir or gearbox housing while blocking airborne dirt, dust, and debris from contaminating the fluid inside. On hydrostatic ride-on trowels like the HTX44 and STX55 series, maintaining a clean breather is critical to stable hydraulic pressure and consistent blade pitch control. When a breather becomes clogged or damaged, the resulting pressure differential can stress seals and cause fluid contamination, leading to costly repairs if left unaddressed.
For fitment questions or to confirm compatibility with your specific machine, contact the DHS Equipment team before ordering.
Part Details
| Part Number | 21513 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Filter Breather 10 Micron 1/4MP Plastic |
Compatibility & Fitment
| Name | Model |
|---|---|
| Whiteman Ride-On Power Trowels | HTX44K4 |
| Whiteman Ride-On Power Trowels | HTX44K5 |
| Whiteman Ride-On Power Trowels | HTX44Y4 |
| Whiteman Ride-On Power Trowels | HTX44Y5 |
| Whiteman Ride-On Power Trowels | HTXD6i |
| Whiteman Ride-On Power Trowels | STX55J6 |
| Whiteman Ride-On Power Trowels | STX55Y6 |
| Whiteman Ride-On Power Trowels | STXD6i |
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.
