The Wacker Neuson O-Ring Kit, Hydraulic is a genuine OEM component designed for the BL744ch, BL744h, BL742h, BL744c, BL744 EX, and BL742 EX backhoe loaders. Sourced directly from Wacker Neuson, this kit delivers the exact seal geometry, material compound, and dimensional tolerances specified for these machines. Keeping the hydraulic circuit properly sealed is critical to maintaining system pressure, and the gives you confidence that every o-ring in the set meets the original build specification. Whether you're completing a scheduled hydraulic service or addressing a confirmed leak, this kit has the seals you need to do the job right.
Key Features
- OEM-Grade Seal Material — Each o-ring is manufactured to the same compound hardness and temperature rating as the originals, ensuring consistent compression and long-term sealing performance in hydraulic applications.
- Complete Kit Coverage — Includes the full set of hydraulic o-rings needed for the service, so you won't be short a seal mid-repair.
- Direct Drop-In Fit — Engineered to the exact cross-section and inner diameter of the original seals, allowing straightforward installation into existing hydraulic fittings and components without modification.
- Broad BL-Series Compatibility — Confirmed fitment across the BL744ch, BL744h, BL742h, BL744c, BL744 EX, and BL742 EX backhoe loader models.
- Hydraulic System Integrity — Worn or damaged o-rings allow hydraulic fluid to bypass sealing surfaces, causing pressure loss, slow or unresponsive loader and backhoe functions, and potential fluid contamination. Replacing with the correct OEM seals restores full circuit integrity.
- Genuine Wacker Neuson Part — Supplied as an authorized OEM kit under part number 5100035903, ensuring traceability and verified compatibility for BL-series machines.
Hydraulic o-rings create the fluid-tight seals between fittings, valves, cylinders, and hoses throughout the machine's hydraulic circuit. They work under sustained pressure and temperature cycles, and over time the rubber compound can harden, crack, or take a permanent set — allowing fluid to leak past the seal face. Even a small leak can drop system pressure enough to affect the speed and force of the loader arms or backhoe circuit. Replacing worn seals with the correct-spec o-rings from the Wacker Neuson 5100035903 kit restores proper pressure and prevents further fluid loss or internal contamination.
Part Details
| Part Number | 5100035903 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | O-Ring Kit, Hydraulic |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| BL744ch Backhoe Loader | BL744ch | 5100031800 |
| BL744h Backhoe Loader | BL744h | 5100031801 |
| BL742h Backhoe Loader | BL742h | 5100031802 |
| BL744c Backhoe Loader | BL744c EX | 5100031803 |
| BL744 EX Backhoe Loader | BL744 EX | 5100031804 |
| Backhoe Loader | BL742 EX | 5100031805 |
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.
