301.01.0029 Unloader Valves — WABCO
301.01.0029
●Port 1: M22x1,5 ●Port 4: M12x1,5 ●Port 21: M22x1,5 ●Port 22: M12x1,5 ●Port 23: M12x1,5 ●Cut-Out Pressure: 7,3 BAR / 0,2 BAR ●Inflation Valve: OK ●Recycle Valve: -
| EAN Code | 8683457011144 |
|---|
Description
The heavy-duty unloader valve is a critical component within the pneumatic brake system, ensuring precise pressure regulation and operational safety. Designed with high-strength components, this part manages air flow and pressure cut-out functions to maintain stable system performance in demanding environments.
301.01.0029 is the OE-equivalent of the WABCO 975 303 449 0 unloader valve used in DAF, MERCEDES BENZ, PETERBILT, and LIEBHERR heavy commercial vehicles. This component also maintains compatibility with several other major systems including NEOPLAN and KENWORTH, ensuring seamless integration into existing pneumatic architectures.
Workshop technicians should note the specific port configurations for correct installation: Port 1 (M22x1,5), Port 4 (M12x1,5), Port 21 (M22x1,5), Port 22 (M12x1,5), and Port 23 (M12x1,5). The device operates with a cut-out pressure of 7,3 BAR / 0,2 BAR. Regular inspection of the inflation valve functionality is recommended during routine brake system maintenance to prevent pressure irregularities.
Technical Specifications
| Port 1 | M22x1,5 |
|---|---|
| Port 4 | M12x1,5 |
| Port 21 | M22x1,5 |
| Port 22 | M12x1,5 |
| Port 23 | M12x1,5 |
| Cut-Out Pressure | 7,3 BAR / 0,2 BAR |
| Inflation Valve | OK |
| Recycle Valve | - |
Other OEMs
DAF
- 0871390
- 1506502
KENWORTH
- S 9753034490
LIEBHERR
- 5026348
MERCEDES BENZ
- 002 431 70 06
- 0024317006
- A0024317006
NEOPLAN
- 110249400
PETERBILT
- S 9753034490
WABCO
- 975 303 442 0
- 975 303 449 0
- 9753034420
- 9753034490
Related Products
Repair Kits
Vehicles Used
| Brand | Model | Engine |
|---|---|---|
| DAF | ||
| EVOBUS | ||
| KENWORTH | ||
| LIEBHERR | ||
| MERCEDES BENZ | ||
| MERITOR | ||
| NEOPLAN | ||
| PETERBILT | ||
| WABCO |