Bomag 05546336 Square Ring

The Bomag 05546336 Square Ring is a genuine OEM sealing component designed for Bomag BC-series refuse/landfill compactors, BC-series soil compactors, and MPH/RS recyclers and stabilizers. Sourced directly from Bomag, this square ring delivers an exact dimensional match to the original, ensuring a proper hydraulic or fluid seal without modification. Confirmed fitment spans machines including the BC 671 RB, BC 771 RB, BC 771 RS, BC 772 RB, BC 772 RS, BC 672 RB, BC 772 RB-2, BC 672 RB-2, BC 772 RS-2, BC 772 EB-2, BC 672 EB-2, MPH 125, MPH 122-2, MPH 600, MPH 600 3B/4i-PB, MPH 600 EU-FLEX, RS 460, RS 650, and RS460 Stage V.

Key Features

• OEM Sealing Integrity — manufactured to Bomag's original material and dimensional specification, ensuring the cross-section profile seats correctly and maintains a leak-free seal under operating pressures typical of heavy compaction equipment
• Direct Drop-In Replacement — this square ring installs into the same groove and bore as the original, requiring no re-machining or adaptation of mating surfaces
• Broad Confirmed Fitment — verified for BC-series refuse/landfill compactors, BC-series soil compactors, and MPH/RS recyclers and stabilizers, including the BC 771 RB, BC 772 RS-2, MPH 600, RS 460, RS 650, and related models
• Fluid System Protection — a correctly seated square ring prevents hydraulic fluid or lubricant bypass at the sealed joint; a worn or extruded ring leads to seepage, pressure loss, and accelerated wear on surrounding components
• Genuine Bomag Part — supplied as an authentic OEM component under part number 05546336, traceable to Bomag's own parts catalog for confident ordering

A square ring is a hydraulic or fluid sealing element similar in purpose to an O-ring but with a flat, square cross-section profile. That flat profile resists rolling and twisting within its groove under pressure cycling, giving it more stable sealing contact across the face of the joint. In heavy equipment such as refuse compactors and recyclers, these rings are used throughout hydraulic circuits, gear cases, and cylinder assemblies to contain fluid and maintain system pressure. When a square ring hardens, cracks, or extrudes from its groove, the sealed joint begins to leak, causing pressure drop, contamination ingress, and potential damage to pumps, motors, or bearings downstream.

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.