Bomag 31791136 Radial Seal

The Bomag 31791136 Radial Seal is a genuine OEM radial seal designed for Bomag BW 170 AD and BW 174 series tandem rollers, including the BW 174 AC, BW 174 AC AM, BW 174 AD, BW 174 AD AM, BW 174 AD-2, BW 174 AD-2 AM, BW 174 AC-2, BW 174 AC-2 AM, BW 170 AD-2 AM, BW 174 AP, BW 174 AP-AM, and BW 174 ACP-AM. Sourced directly from Bomag, this radial seal matches the original part in material grade, dimensional tolerancing, and compression characteristics — delivering the sealing integrity your machine was built with. With a direct drop-in fit, this seal installs into the designated housing without modification and restores full sealing performance across all covered variants.

Key Features

• Genuine OEM Sealing Material — manufactured to Bomag's original compound and dimensional specs, ensuring correct lip geometry and compression load for consistent fluid containment in tandem roller drive and drum assemblies
• Direct-Fit Replacement — engineered to seat flush in the original housing bore, this radial seal installs cleanly against mating surfaces without rework or adapter hardware
• Broad BW 174 Series Coverage — fits BW 170 AD, BW 170 AD-2 AM, BW 174 AC, BW 174 AC AM, BW 174 AC-2, BW 174 AC-2 AM, BW 174 AD, BW 174 AD AM, BW 174 AD-2, BW 174 AD-2 AM, BW 174 AP, BW 174 AP-AM, and BW 174 ACP-AM tandem rollers
• Leak Prevention Under Load — a properly functioning radial seal keeps hydraulic or lubricating fluid contained under rotation and pressure, protecting adjacent bearings and shaft surfaces from contamination and premature wear
• Fluid Containment Safety — a failed or bypassing radial seal can allow fluid onto drum surfaces or braking components, presenting a traction and control hazard on grade; replacing with a genuine part restores the sealing barrier promptly

A radial seal — also called a shaft seal or lip seal — wraps around a rotating shaft and forms a dynamic barrier that prevents lubricant from escaping the housing while keeping contaminants out. In tandem rollers like the BW 174 series, these seals are critical at drum drive shafts, hydraulic motor interfaces, and wheel-motor assemblies where continuous rotation places steady demand on the sealing lip. When a radial seal wears, hardens, or takes on a set, it loses contact pressure against the shaft and allows fluid to bypass — leading to external leaks, bearing starvation, and accelerated drivetrain wear. Replacing a degraded seal promptly with an exact OEM-specification part like the Bomag 31791136 restores the fluid boundary and extends the service life of surrounding components.

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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