The Wacker Neuson is a genuine OEM M5 Washer RD12 Tow Valve designed for RD12A-90 and RD12-90 series tandem rollers. Sourced directly from Wacker Neuson, this part meets the exact specifications of the original component installed at the factory. It is confirmed to fit across RD12A-90 and RD12-90 configurations, including models RD12A-90, RD12-90. Verifying your machine's model number before ordering ensures a straight swap with no guesswork.
Key Features
- Genuine OEM Washer Spec: — Manufactured to the exact M5 dimensional standard, ensuring correct seating and load distribution at the tow valve mounting point.
- Direct-Swap Installation: — Matches the original fastener interface at the tow valve assembly, dropping in without any reworking of surrounding hardware.
- Broad RD12 Series Coverage: — Fits RD12A-90 and RD12-90 tandem rollers, including solid ROPS and foldable ROPS configurations.
- Tow Valve Integrity: — A correctly fitted washer maintains proper clamping force at the tow valve, preventing loosening or fluid-path misalignment during towing operations.
- Towing Safety Relevance: — The tow valve controls hydraulic bypass when the machine is being towed; a missing or damaged washer at this location can compromise valve retention and safe tow function.
The tow valve on an RD12 tandem roller allows the machine to be moved without engine power by bypassing the hydraulic drive circuit. The M5 washer at this location provides the clamping interface that holds the valve hardware securely in position under the mechanical stress of towing. If this washer is worn, missing, or incorrectly sized, the tow valve assembly can work loose, leading to unpredictable hydraulic behavior or loss of tow control.
Part Details
| Part Number | 5000178158 |
|---|---|
| Old Part Number | 0178158 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | M5 Washer RD12 Tow Valve |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| RD12A-90 ROLLER,DBL DRUM,GRN | RD12A-90 | 5000620369, 5000620058, 5000620320 |
| RD12-90 ROLLER, DOUBLE DRUM, SOLID ROPS | RD12-90 | 5000620059, 5000620321 |
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.
