Bomag Belleville Spring Kit | Part 05800123

The Bomag 05800123 Belleville Spring Kit is a genuine OEM component designed for BW-series tandem rollers, BW-series single drum rollers, and MPH-series recyclers/stabilizers. Sourced directly from Bomag, this kit delivers the exact spring geometry, material grade, and load rating required to restore proper clamping force in your machine. It is confirmed to fit a broad range of machines — including BW 174 AD, BW 202 AD-4, BW 154 AD-4, BW 161 AD-4, BW 177 DH-4, BW 179 DH-4, MPH 121, MPH 122, and many additional BW tandem and single drum roller variants. When a Belleville spring stack loses its tension or cracks, the assemblies it loads can slip, chatter, or fail to disengage cleanly — replacing the full kit at once is the correct service practice.

Key Features

• Genuine OEM Spring Rate — each disc in this kit is manufactured to Bomag's exact load-deflection specification, ensuring the stacked spring assembly delivers the correct clamping or preload force rather than an approximation
• Complete Kit Format — all required Belleville disc springs are included together, so the entire spring stack can be replaced in a single service event without sourcing individual discs separately
• Broad BW and MPH Coverage — verified to fit BW-series tandem rollers, BW-series single drum rollers, and MPH 121 and MPH 122 recyclers/stabilizers, covering multiple generation variants across the -2, -4, and -4i model lines
• Restores Correct Preload and Engagement — a fatigued or fractured Belleville spring stack allows the components it tensions to slip or bind; this kit brings preload back to the designed specification so clutch, brake, or drive assemblies engage and release as intended
• Direct OEM Cross-Reference — part number 05800123 is the Bomag-cataloged reference for this kit, eliminating guesswork when ordering and ensuring the correct discs ship the first time

Belleville springs — also called disc springs or conical washers — are precision-formed conical metal discs stacked in series or parallel to generate a controlled axial force within a compact space. In BOMAG rollers and stabilizers, these spring stacks are commonly used to maintain clamping loads on clutch packs, brake assemblies, and drive components, providing consistent engagement force across a range of operating temperatures. Over time, repeated compression cycles cause the discs to fatigue, lose their cone height, or crack, which reduces preload below the designed threshold and leads to inconsistent engagement, slippage, or premature wear of the components the springs are meant to hold. Replacing the full Belleville Spring Kit — rather than individual discs — ensures the stack behaves as a matched set and restores the original load curve.

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.

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