Multiquip 509369 Straight Male Adaptor

The Multiquip 509369 Straight Male Adaptor is a genuine OEM hydraulic fitting designed for Multiquip Mayco concrete pump models including the LS-40, LS40TD, LS50TD, LS60TD, LS300, LS400, LS450, LS500, LS600, LS600P, and ST-45HRM and ST-70 series. As a factory-sourced component, it meets the exact dimensional and pressure tolerances specified for these hydraulic systems. Buying genuine OEM ensures the adaptor threads, seating surface, and port sizing match the original hardware without the need for field modifications. DHS Equipment stocks this part to help you get your concrete pump back in service quickly.

Key Features

• Genuine OEM Hydraulic Spec: — Manufactured to Multiquip's exact thread pitch, port sizing, and pressure rating for the hydraulic circuits found on Mayco LS-series concrete pumps.
• Direct-Thread Installation: — The straight male configuration seats directly into the mating female port on the hydraulic manifold or plumbing run, allowing a clean, leak-free connection without additional adaptor hardware.
• Broad LS-Series Compatibility: — Fits LS-40, LS40D, LS40TD, LS50TD, LS60TD, LS300, LS400, LS450, LS500, LS600, LS600P, ST-45HRM, and ST-70 models.
• Hydraulic Integrity: — A correctly seated adaptor maintains consistent hydraulic pressure throughout the pump circuit; a damaged or mismatched fitting can cause pressure loss, fluid leaks, and erratic concrete pump output.
• Pressure-System Safety: — Using a correctly rated OEM fitting in a hydraulic circuit is critical — undersized or mismatched adaptors can fail under operating pressure, creating a fluid injection hazard.

A straight male adaptor is a threaded hydraulic fitting used to connect two sections of a hydraulic plumbing circuit — joining a hose end, valve port, or manifold outlet in a fixed, straight-line orientation. On Mayco LS-series concrete pumps, the hydraulic system controls the pumping action, hopper agitation, and in some models the drive functions, so maintaining leak-free, correctly rated connections throughout the circuit is essential to consistent output and safe operation. When an adaptor is cross-threaded, corroded, or cracked, hydraulic fluid loss can cause erratic pump behavior, overheating, and potential system failure.

For fitment questions or to confirm this part is correct for your serial number, contact the DHS Equipment parts team before ordering.

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.