Multiquip 12546 Quick Disconnect 4MO Diagnostic Parker PD341 Fitting

The Multiquip 12546 Quick Disconnect 4MO Diagnostic Parker PD341 Fitting is a genuine OEM hydraulic diagnostic fitting designed for HTX44, STX55, MD, and LD series hydrostatic ride-on power trowels. As an authorized Multiquip OEM part, 12546 is manufactured to the same specifications as the original component, ensuring a direct, correct-connection fit into the hydraulic diagnostic port with no adaptation needed. This fitting is compatible across a broad range of Multiquip hydrostatic trowel models including HTX44K4, HTX44K5, HTX44Y4, HTX44Y5, STX55J6, STX55Y6, MD80, MD105, LD60, and LD6/LD6SL. Sourced directly from Multiquip, this part is stocked and sold by DHS Equipment to keep your hydraulic service and diagnostic work on schedule.

Key Features

• Genuine OEM Parker PD341 Specification — Manufactured to the original Parker PD341 4MO diagnostic port standard, ensuring correct pressure-rated engagement and leak-free sealing when connected to diagnostic test equipment.
• Direct Port Connection — Designed to thread directly into the existing hydraulic diagnostic port on compatible Multiquip hydrostatic trowels with no modification to hydraulic lines or fittings required.
• Broad Hydrostatic Trowel Compatibility — Verified fitment across HTX44K4, HTX44K5, HTX44Y4, HTX44Y5, STX55J6, STX55Y6, MD80, MD105, LD60, and LD6/LD6SL models.
• Accurate Hydraulic Diagnostics — A correctly seated diagnostic fitting allows technicians to read live hydraulic pressure with confidence, enabling precise troubleshooting of drive and blade control circuits.
• Hydraulic System Integrity — Using the correct OEM-spec fitting prevents port damage, thread mismatch, and pressure bleed-off during diagnostic procedures — all of which can compromise hydraulic system readings and machine safety.

A quick disconnect diagnostic fitting provides a dedicated access point in a hydraulic circuit, allowing a pressure gauge or diagnostic tool to be connected and disconnected without opening the system to contamination or causing fluid loss. On hydrostatic ride-on trowels like the HTX44 and STX55 series, accurate hydraulic pressure readings are essential for diagnosing issues with blade pitch control and drive response. A damaged, worn, or incorrect fitting can introduce air into the system, produce false pressure readings, or prevent a proper seal — leading to misdiagnosis and extended downtime on the machine.

For questions about part 12546 or fitment confirmation for your specific trowel model, contact the DHS Equipment team directly.

Part Details

Compatibility & Fitment

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.