The Multiquip 42090 Gen 3 Hydraulic Expansion Tank is a genuine OEM component designed for HTX6H, STX6H, and HTXG6DF hydrostatic ride-on power trowels. As a direct factory replacement, this tank is built to the exact specifications of the original unit, ensuring proper hydraulic system function across compatible Whiteman ride-on trowel models. Sourced directly through authorized Multiquip distribution channels, part 42090 is the correct service replacement when the original expansion tank shows wear, damage, or leakage.
Key Features
- Genuine OEM Construction: — Manufactured to the same dimensional and material standards as the original Gen 3 hydraulic expansion tank, ensuring correct fit within the hydraulic circuit.
- Direct Drop-In Replacement: — Mounts in the same position as the factory unit on HTX6H, STX6H, and HTXG6DF trowels with no fabrication or adaptation needed.
- Confirmed Fitment: — Verified for HTX6H, STX6H, and HTXG6DF Whiteman hydrostatic ride-on power trowel models.
- Hydraulic System Integrity: — Maintains correct fluid volume and pressure balance in the hydraulic system, supporting consistent blade pitch control and drive response.
- Fuel System Safety Relevance: — A properly sealed and functional expansion tank prevents hydraulic fluid loss and contamination, protecting downstream components including pumps, motors, and control valves.
The hydraulic expansion tank serves as a fluid reservoir buffer within the hydrostatic system of a ride-on power trowel. It accommodates thermal expansion and contraction of hydraulic fluid as the machine heats up and cools down during operation, keeping system pressure within safe operating limits. When this tank cracks, leaks, or fails, hydraulic fluid levels drop, leading to erratic blade pitch response, loss of drive function, and potential damage to the hydraulic pump and motor.
Part Details
| Part Number | 42090 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Gen 3 Hydraulic Expansion Tank |
Compatibility & Fitment
| Name | Model |
|---|---|
| Whiteman Ride-On Power Trowels | HTX6H |
| Whiteman Ride-On Power Trowels | STX6H |
| Whiteman Ride-On Power Trowels | HTXG6DF |
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.
