The Multiquip 2134 Plunger Arm is a genuine OEM component designed for HTX and STX series ride-on power trowels — including HTXD6i, STXD6i, STX55J6, STX55Y6, HTXG6DF, HTX44Y5, HTX44Y4, HTX44K5, and HTX44K4 — as well as MQD2H, MQD2HA, MQD3H, and MQD3HA diaphragm pumps. As a direct Multiquip OEM part, the 2134 is manufactured to the exact tolerances required for correct operation across these machine families. Sourcing the correct plunger arm matters: an improperly fitted or worn arm affects mechanical response and can compromise overall machine control. DHS Equipment stocks this part and can help verify fitment for your specific unit.
Key Features
- Genuine OEM Construction — Manufactured by Multiquip to exact dimensional and material specifications, ensuring the 2134 engages and moves with the mechanical precision these machines demand.
- Direct Drop-In Replacement — Engineered to install in the same mounting position as the original, with no reworking of adjacent linkage or hardware required.
- Broad Fitment Across Two Equipment Families — Confirmed for HTX and STX ride-on power trowels (HTXD6i, STXD6i, STX55J6, STX55Y6, HTXG6DF, HTX44Y4/Y5, HTX44K4/K5) and MQD2H, MQD2HA, MQD3H, MQD3HA diaphragm pumps.
- Maintains Precise Mechanical Actuation — A correctly functioning plunger arm delivers consistent, repeatable movement through the linkage; a worn or bent arm introduces slop and uneven mechanical response that degrades machine performance.
- Verified Part Number — Order with confidence using Multiquip part number 2134 to confirm you are receiving the correct component for your machine.
The plunger arm is a mechanical linkage component that transmits and translates motion within the machine's actuation system. On ride-on power trowels, it forms part of the pitch control or blade-engagement mechanism, converting operator input into precise blade adjustment. On diaphragm pumps, the arm drives reciprocating motion that creates the suction and discharge action at the heart of the pump's fluid-handling function. When a plunger arm wears, bends, or cracks, the mechanical connection becomes inconsistent — leading to erratic blade response on trowels or reduced pumping efficiency and output on diaphragm pumps. Replacing it with the correct OEM component restores full mechanical integrity to the linkage.
Part Details
| Part Number | 2134 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Plunger Arm |
Compatibility & Fitment
| Name | Model |
|---|---|
| Whiteman Ride-On Power Trowels | HTXD6i |
| Whiteman Ride-On Power Trowels | STXD6i |
| Whiteman Ride-On Power Trowels | STX55J6 |
| Whiteman Ride-On Power Trowels | STX55Y6 |
| Whiteman Ride-On Power Trowels | HTXG6DF |
| Whiteman Ride-On Power Trowels | HTX44Y5 |
| Whiteman Ride-On Power Trowels | HTX44Y4 |
| Whiteman Ride-On Power Trowels | HTX44K5 |
| Whiteman Ride-On Power Trowels | HTX44K4 |
| Diaphragm Pumps | MQD3HA |
| Diaphragm Pumps | MQD2HA |
| Diaphragm Pumps | MQD3H |
| Diaphragm Pumps | MQD2H |
| Whiteman Ride-On Power Trowels | JTO-SERIES |
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.
