The Bomag 05546994 Piston Seal is a genuine OEM piston seal designed for BW 190 AD-4 AM and BW 203 AD-4 AM tandem rollers. Sourced directly from Bomag, this seal matches the exact material grade and dimensional tolerances of the original component installed at the factory. This piston seal fits the BW 190 AD-4 AM, BW 203 AD-4 AM, and BW 203 AD-4 AM EU-Flex tandem rollers, making it a direct, verified replacement for scheduled maintenance or hydraulic system repair. Ordering by part number 05546994 ensures you receive the correct seal for your machine — no guesswork, no fitment risk.
Key Features
- OEM-Grade Seal Material — manufactured to Bomag's original compound and compression specifications, ensuring consistent hydraulic pressure retention across the full operating range of the piston
- Drop-In Hydraulic Fit — dimensionally identical to the original, this seal seats correctly in the piston bore without trimming, shimming, or modification
- Confirmed Tandem Roller Fitment — verified for the BW 190 AD-4 AM, BW 203 AD-4 AM, and BW 203 AD-4 AM EU-Flex tandem rollers
- Hydraulic Integrity Restored — a worn or damaged piston seal allows internal bypass, causing loss of hydraulic force and erratic drum or drive response; replacing it with part number 05546994 restores full system efficiency
- Genuine Bomag OEM Part — backed by Bomag's OEM supply chain, so you can trust this part is built to the same standard as the component it replaces
A piston seal is a critical sealing element within a hydraulic cylinder, preventing fluid from bypassing the piston and maintaining the pressure differential needed to generate controlled, consistent force. On tandem rollers like the BW 190 AD-4 AM and BW 203 AD-4 AM, properly functioning piston seals are essential to steering, vibration, and drum drive hydraulics — systems that directly affect compaction accuracy and operator control. When a piston seal degrades, internal leakage builds, hydraulic response becomes sluggish or uneven, and continued operation risks further damage to the cylinder bore and surrounding components.
Part Details
| Part Number | 05546994 |
|---|---|
| Brand | Bomag |
| Part Type | Genuine OEM |
| Description | Piston Seal |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| Tandem Roller | BW 190 AD-4 AM | 00817825, 00818309, 00824021 |
| Tandem Roller | BW 203 AD-4 AM | 00818591, 00824019 |
| Tandem Roller | BW 203 AD-4 AM EU-Flex | 00824397 |
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.
