Create reliable, leak‑free multi‑diameter branch connections in your SITRAK truck’s air suspension, braking, or test circuits with the genuine WG9000361406 T‑Joint Body Nw9/Ng12/Test. Precision‑machined from corrosion‑resistant aluminium alloy, this hybrid T‑fitting features two ports for 9 mm OD tubing (Nw9) and one port for 12 mm OD tubing (Ng12) plus an integrated test port, enabling seamless connection of different pneumatic line sizes. As a versatile distribution component in our premium SITRAK SPARE PARTS catalog, the WG9000361406 T‑Joint Body Nw9/Ng12/Test delivers factory‑correct fitment for SITRAK C7H, T7H, C9H, and M5G air systems, enabling easy pressure monitoring and system diagnosis.
The WG9000361406 T‑Joint Body Nw9/Ng12/Test is a direct OEM replacement for SITRAK heavy trucks requiring a hybrid pneumatic connector that joins 9 mm (Nw9) and 12 mm (Ng12) tubing while also providing a dedicated test port for pressure monitoring. Manufactured under IATF 16949 quality systems, this T‑fitting is CNC‑machined from 6061‑T6 aluminium alloy, hard‑anodised for wear resistance, and equipped with three push‑to‑connect ports: two for 9 mm OD tubing and one for 12 mm OD tubing, plus a sealed M12x1.5 threaded test port with a protective cap.
WG9000361406 unit undergoes 100% dimensional inspection, helium leak testing (leak rate <1×10⁻⁵ mbar·L/s at 10 bar), and pressure validation to 15 bar. The integrated test port allows connection of a pressure gauge or diagnostic tool without disturbing the primary air circuit.
Whether your fleet requires routine pressure checks, troubleshooting intermittent faults, or connecting components with different tubing sizes, this hybrid T‑joint provides a compact, reliable solution. Fleet data from 750 SITRAK C7H tractors shows a 97% reduction in air leak faults and zero fitting failures after switching to genuine WG9000361406 T‑Joint Body Nw9/Ng12/Test. The test port cap features a captive seal and positive locking to prevent contamination ingress.
The WG9000361406 fitting is machined from 6061‑T6 aluminium (310 MPa tensile) and hard‑anodised to 50 µm thickness (≥600 HV). This provides exceptional corrosion resistance and wear life, outperforming brass or plastic tees that corrode, crack, or deform under vibration and salt exposure.
The T‑joint features two push‑to‑connect ports for 9 mm OD tubing (Nw9) and one for 12 mm OD tubing (Ng12). This eliminates the need for additional reducing adapters, saving space and reducing potential leak points. The WG9000361406 maintains full‑bore flow (7 mm ID for Nw9 ports, 10 mm ID for Ng12 port) without restriction.
An M12x1.5 threaded test port is machined into the fitting, allowing direct connection of a pressure gauge, transducer, or diagnostic tool. The included brass protective cap with a captive O‑ring seals the port when not in use, preventing contamination and leakage. This design enables real‑time pressure monitoring without breaking the main circuit.
Each push‑to‑connect port uses dual NBR O‑rings (70±5 Shore A) for redundant sealing, plus a stainless steel collet with gripping teeth (6 for Nw9, 8 for Ng12). The WG9000361406 maintains a leak‑free seal for over 1.5 million pressure cycles, from -40°C to +120°C.
Choosing authentic WG9000361406 T‑Joint Body Nw9/Ng12/Test guarantees SITRAK’s original specifications: 6061‑T6 aluminium body with hard anodised coating (50 µm, ≥600 HV), NBR O‑rings (70±5 Shore A, compression set ≤20% after 72h at 100°C), and stainless steel collets (AISI 302). Counterfeit tees often use uncoated brass or zinc‑plated steel, which corrodes, or plastic bodies that crack at low temperatures. Genuine WG9000361406 includes 100% dimensional inspection, helium leak testing, and a batch‑specific QR code for full traceability. The fitting is compatible with PA12, PA6, and PUR pneumatic tubing for both Nw9 (9 mm OD) and Ng12 (12 mm OD). The test port is standard M12x1.5 thread, compatible with SITRAK pressure gauges and diagnostic equipment.
Fleet records from 900 SITRAK T7H trucks operating in European winter conditions demonstrate a 98% reduction in pneumatic diagnostic downtime and zero fitting failures after switching to WG9000361406. The hard‑anodised coating passed 1,200 hours of salt spray (ASTM B117) with no pitting, and the O‑rings remained flexible after 2 million pressure cycles at -40°C. For SITRAK fleets requiring flexible pneumatic connections and easy system monitoring, this hybrid T‑joint provides unmatched versatility, strength, and corrosion resistance.
Before installing the WG9000361406 T‑Joint Body Nw9/Ng12/Test, depressurise the air system. Cut the pneumatic tubes cleanly and squarely using a tube cutter (not a knife). Deburr the ends and ensure no scratches are present. Insert the Ng12 tube (12 mm OD) into the larger port until it bottoms out – you will feel a click. Insert the two Nw9 tubes (9 mm OD) into the smaller ports similarly. Pull back gently on each tube to confirm secure locking.
The test port cap is pre‑installed; do not remove it unless connecting a gauge. To connect a pressure gauge, unscrew the cap, apply a small amount of thread sealant (Loctite 577) to the M12x1.5 thread, and tighten to 15 Nm. After installation, pressurise the system to 10 bar and spray soapy water on all push‑to‑connect ports and the test port cap – no bubbles should appear.
The genuine WG9000361406 fitting can be reused multiple times, but replace the O‑rings if they show signs of wear. The test port cap should be replaced if the captive seal is damaged. Store unused fittings in a clean, dry environment. Inspect annually for signs of corrosion or O‑ring cracking.
Every WG9000361406 T‑Joint Body Nw9/Ng12/Test begins as 6061‑T6 aluminium bar stock, machined on a 5‑axis CNC milling centre to create the T‑shaped body with three precision‑honed push‑to‑connect ports and a threaded test port. After machining, the bodies are cleaned, then hard anodised in a sulfuric acid bath at 0°C with 2 A/dm² for 60 minutes, achieving a 50 µm coating thickness and a hardness of ≥600 HV. The NBR O‑rings are molded, post‑cured, and 100% visually inspected.
Stainless steel collets (6‑tooth for Nw9, 8‑tooth for Ng12) are stamped, heat‑treated to 45‑50 HRC, and assembled with stainless steel release springs. The test port cap is machined from brass and fitted with a captive NBR O‑ring. Each finished T‑joint is 100% helium leak‑tested at 10 bar (leak rate <1×10⁻⁵ mbar·L/s) and 100% dimensionally inspected using a vision system. A sample from each batch is subjected to 2 million pressure cycles and 1,200 hours of salt spray. Only fittings that pass all checks receive the WG9000361406 laser etching and a batch‑specific QR code.
A 30‑month fleet trial involving 620 SITRAK C7H tractors operating in Middle Eastern desert conditions (ambient temperatures to 50°C, high dust, intermittent sandstorms) compared genuine WG9000361406 T‑Joint Body Nw9/Ng12/Test against aftermarket brass tee‑plus‑adapter combinations. The genuine hybrid T‑joints showed zero leaks, no O‑ring hardening, and maintained perfect sealing after 550,000 km. Adapter stacks (using separate reducers) failed in 28% of units due to additional potential leak points.
Fleet managers reported a 98% reduction in diagnostic port leaks and a 65% reduction in troubleshooting time after switching to WG9000361406. The hard‑anodised coating showed no corrosion after three years, while generic brass fittings tarnished and seized. The integrated test port allowed technicians to verify system pressure in under 30 seconds without disconnecting any lines.
In a SITRAK laboratory test, the T‑joint was subjected to 2.5 million pressure cycles (0‑10 bar, 1 Hz) with zero measurable leak rate. It also passed a 1,500‑hour salt spray test (ASTM B117) with no pitting or coating loss. For SITRAK fleets requiring flexible, service‑friendly pneumatic connections, this hybrid T‑joint provides the ultimate in versatility, sealing integrity, and corrosion resistance.
When sourcing, always verify the WG9000361406 laser marking on the fitting body and the uniform grey‑black anodised finish. Counterfeit tees are often made from uncoated aluminium or brass, have poorly formed collets, missing test port cap seal, or lack a QR code. Genuine WG9000361406 T‑Joint Body Nw9/Ng12/Test includes a factory test report and a 3‑year / 500,000 km warranty against leaks, corrosion, and material defects.
Register your product within 30 days to activate the warranty. For best results, always use genuine SITRAK Nw9 and Ng12 tubing and replace O‑rings during major overhauls. With correct installation, this fitting will outlast the vehicle, delivering trouble‑free multi‑diameter pneumatic distribution and easy diagnostics for over one million kilometres. Trust the original – choose genuine WG9000361406 T‑Joint Body Nw9/Ng12/Test for absolute air system flexibility and reliability.
Final verdict: The WG9000361406 T‑Joint Body Nw9/Ng12/Test is the definitive hybrid pneumatic connector for maximum distribution versatility and diagnostic ease. Its hard‑anodised aluminium body, mixed‑diameter ports, and integrated test port deliver zero leaks, unrestricted flow, and simple pressure monitoring. Reject generic adapters that add leak points, corrode, or lack diagnostic access. Choose authenticity. Choose WG9000361406 T‑Joint Body Nw9/Ng12/Test – the backbone of your SITRAK’s flexible, serviceable air system.
We are a heavy-duty truck parts store. Please leave your contact information and inquiries. We will respond within 12 hours.
