Bomag 05741320 Piston Ring Set

The Bomag 05741320 Piston Ring Set is a genuine OEM component designed for Bomag BW 100, BW 120, and BW 125 series tandem rollers. Sourced directly from Bomag, this piston ring set delivers an exact match to the original specification, ensuring proper sealing and compression in the engine. It is confirmed to fit a broad range of tandem roller variants, including the BW 100 AD-4, BW 100 AC-4, BW 120 AD-4, BW 120 AC-4, BW 125 AD-4, BW 125 AC-4, BW 120 SL-5, BW 100 SL-5, BW 115 AC-5, BW 131 ACW-5, BW 100 AC-5, BW 120 AC-5, BW 100 AD-5, BW 120 AD-5, BW 120 SLC-5, BW 120SL-5, and BW 120 AD-5 CC. When your tandem roller's engine shows signs of worn rings — oil consumption, loss of power, or excessive blow-by — this set restores the seal and gets your machine back to full output.

Key Features

• OEM Compression Integrity — manufactured to the same bore diameter, ring thickness, and gap tolerances as the original Bomag engine specification, so combustion sealing is restored correctly from the first start
• Direct Engine Drop-In — this piston ring set is engineered to seat in the existing piston grooves without recutting or resizing, making it a straightforward swap during an engine rebuild or top-end service
• Broad Tandem Roller Coverage — fits BW 100, BW 120, and BW 125 series tandem rollers across fourth- and fifth-generation variants, including AC, AD, SL, SLC, ACW, and CC configurations
• Restored Engine Power and Efficiency — worn piston rings allow combustion gases to bypass the piston, robbing the engine of compression and increasing oil burn; a fresh set restores full power output and reduces oil consumption
• Genuine Bomag OEM Part — part number 05741320 is an authentic Bomag component, eliminating fitment guesswork and ensuring the engine rebuild meets the original design intent

Piston rings form a dynamic seal between the piston and the cylinder wall, containing combustion pressure and preventing engine oil from entering the combustion chamber. A complete piston ring set typically includes compression rings, which hold combustion gases in, and an oil control ring, which scrapes excess oil back down the cylinder wall. When rings wear, lose tension, or break, the engine loses compression, burns oil, produces visible exhaust smoke, and delivers noticeably reduced power — all signs that a ring replacement is overdue. Installing a fresh set during a rebuild restores the tight seal the engine needs to run efficiently and at full rated output.

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.