Multiquip 50002800 Lock Washer 8 2M40L 6" Pump

The Multiquip 50002800 is a genuine OEM Lock Washer 8 2M40L 6" Pump designed for RAMMAX roller models RW1404, RW1404MR, and RW1504HF. As a direct OEM replacement sourced from Multiquip, part 50002800 meets the same specifications as the original hardware installed at the factory. Verified fitment includes RW1404MR units (including S/N 326075 and up) and RW1504HF units up to S/N, making it straightforward to confirm compatibility before ordering.

Key Features

• Genuine OEM Hardware Grade — Manufactured to the same material hardness and dimensional tolerancing as the original lock washer, ensuring proper clamping force in pump assembly fastening applications.
• Drop-In Replacement — Matches the original mounting position and thread engagement in the 6" pump assembly, allowing direct installation without modification.
• Confirmed Roller Fitment — Compatible with RW1404, RW1404MR (S/N 326075 and up), and RW1504HF (up to S/N 1534188) RAMMAX walk-behind rollers.
• Maintains Fastener Integrity — A functioning lock washer prevents loosening under vibration and operational loads; a worn or missing one can allow fastener back-out, leading to pump assembly instability.
• Correct Part, First Time — Ordering by Multiquip part number 50002800 eliminates guesswork when sourcing small hardware that is easy to substitute incorrectly.

A lock washer is a hardened fastening component placed beneath a bolt or nut to resist loosening caused by vibration and dynamic loads. In a roller's pump assembly, where continuous mechanical vibration is present during compaction work, the lock washer maintains the clamping load on fasteners that secure critical pump components. When a lock washer becomes deformed, corroded, or missing, fasteners can gradually back out, compromising the integrity of the pump mounting and potentially causing leaks or mechanical failure during operation.

For questions about fitment or to confirm this is the correct part for your machine, contact the DHS Equipment parts 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.