MAN TGA/TGL/TGM/TGX 4-Circuit Protection Valve 81521516098 Wabco 9347144000 Horn Valves & Pulls

Description:
This listing is for a genuine WABCO 4-circuit protection valve used on MAN trucks. The component is part of the compressed air brake system and protects up to four independent circuits (service brake, parking brake, auxiliary and trailer) from total loss of air in the event of a failure in one circuit. According to MAN and WABCO catalogues, MAN OE 81521516098 and casting number 81.52151-6098 correspond directly to WABCO 9347144000 / 9347140000 multicircuit protection valve, also used by Neoplan under 8151516095.

The valve shown in the photos matches the online catalogue images and port layout for this part, with central supply port and four M22x1.5 Voss outlet ports arranged around the body. Technical data from WABCO/Vaden indicates typical opening pressures of around 6.9–7.0 bar and closing pressures around 5.0 bar for all four circuits, ensuring correct prioritisation and safe system build-up. No electrical connector is present as this is a purely pneumatic device.

Confirmed compatibility from multiple parts catalogues shows application across a wide range of MAN commercial vehicles, including CLA, FOC, L2000, M2000/M2000L/M2000M, NL and N series city buses, and heavy truck ranges TGA, TGL, TGM, TGS and TGX in Euro 3/4/5 configurations. It is typically chassis-mounted within the air system close to the reservoirs. Always check your existing part number (81521516098, 81.52151-6098 or 9347144000) and compare the port layout with your old valve before ordering.

This used valve was removed from a running vehicle and was checked on the truck before dismantling to confirm that it built and held air correctly. After removal it received a basic visual inspection; there are no visible cracks or damage to the housing. Due to age and use, external surfaces show dirt and oxidation, so professional cleaning and installation by a qualified technician are recommended. No calibration or electronic programming is required, but the air system should be pressure-tested for leaks after installation.

Supplied as the bare valve only, without mounting bolts, brackets, pressure sensors, pipes or additional fittings. Replace all sealing rings and use suitable thread sealant during installation. This genuine WABCO unit offers a robust and reliable solution compared with cheap non-branded aftermarket alternatives, making it ideal for keeping a working MAN fleet on the road at reduced cost.

All our parts are carefully packed for shipment. The item carries a 3 month warranty against mechanical failure under normal use. Please verify compatibility with your vehicle using the OE numbers and specifications provided.

Shipping & Returns:
We ship across UK/EU with tracked services. Returns accepted within 30 days; buyer pays return postage. Please inspect upon arrival and message us with any concerns.

Why Buy From Us:
Genuine part, 3-month warranty, fast dispatch, secure packaging.