Transform your SITRAK coach or heavy truck’s rear suspension into a paragon of ride smoothness and axle reliability with the genuine 711-35003-7715 Mcy1350jes Single Rear Axle Housing And Hub Assembly (Air Suspension, Four Airbags, P22ja, ABS, Air Chamber Rear). Engineered for 13.5‑tonne nominal load and integrated with a four‑airbag air suspension system, this complete housing and hub assembly delivers exceptional vibration isolation, automatic ride height control, and failsafe braking.
As a flagship component in our premium SITRAK SPARE PARTS catalog, the 711-35003-7715 Mcy1350jes Single Rear Axle Housing And Hub Assembly (Air Suspension, Four Airbags, P22ja, ABS, Air Chamber Rear) provides factory‑correct fitment for SITRAK C7H, T7H, and C9H series equipped with air‑ride rear suspensions, eliminating chassis roll and reducing cargo damage.
The 711-35003-7715 Mcy1350jes Single Rear Axle Housing And Hub Assembly (Air Suspension, Four Airbags, P22ja, ABS, Air Chamber Rear) is a fully integrated, bolt‑on solution for SITRAK vehicles requiring superior ride quality and load levelling. It combines a 13.5‑tonne rated hypoid axle housing, a four‑airbag air suspension system with two height‑control valves, P22ja disc brakes, WABCO ABS sensors, and twin brake chambers (service + spring parking). Manufactured under IATF 16949, every 711-35003-7715 unit undergoes 100% airbag leak testing, axle housing X‑ray inspection, and ABS sensor calibration.
Whether your fleet operates luxury passenger coaches, fragile freight carriers, or high‑value tankers, this air‑suspension axle eliminates road shock transmission to the chassis, reducing cargo damage by up to 40%. Fleet data from 500 SITRAK C7H tour buses shows a 98% reduction in suspension‑related breakdowns and a 35% improvement in passenger ride comfort after fitting genuine 711-35003-7715 Mcy1350jes Single Rear Axle Housing And Hub Assembly (Air Suspension, Four Airbags, P22ja, ABS, Air Chamber Rear). The assembly is ready to install – including airbags, shock absorbers, levelling valves, brake calipers and chambers.
The 711-35003-7715 assembly includes four heavy‑duty airbags (each rated 4,500 kg) and two WABCO height‑control valves that maintain constant ride height regardless of load. Air pressure is adjusted automatically, eliminating chassis sag and improving headlamp aim stability.
The axle comes with Knorr‑Bremse P22ja disc brake calipers, ventilated rotors, and WABCO ABS sensors pre‑installed. The system provides 25% shorter stopping distances than drum brakes and eliminates fade on long descents, while ABS ensures safe steering control.
The Mcy1350jes axle features a precision‑lapped hypoid gear set with a 3.70:1 ratio (other ratios available on request). The 40 mm hypoid offset reduces sliding friction, improving fuel economy by 2.5% compared to conventional bevel axles. The housing is made from GGG 60 nodular iron.
Every 711-35003-7715 unit comes with airbags, shocks, brake chambers, ABS sensors, and height valves already installed and adjusted. Installation takes under 4 hours – simply bolt the axle to the chassis rails, connect air lines and electrical plugs, and perform a final ride height check.
Choosing authentic 711-35003-7715 Mcy1350jes Single Rear Axle Housing And Hub Assembly (Air Suspension, Four Airbags, P22ja, ABS, Air Chamber Rear) guarantees SITRAK’s original materials and assembly quality: the axle housing is cast from GGG 60 nodular iron (600 MPa tensile, 12% elongation), the airbags are made from chlorobutyl rubber with aramid reinforcement (tested to 2 million cycles at 8 bar), and the brake discs are high‑carbon alloy with 300,000 km wear life. Counterfeit assemblies often use low‑grade cast iron housings, single‑ply airbags that rupture, and non‑genuine brake pads that glaze. Genuine 711-35003-7715 includes 100% X‑ray and pressure testing of the housing, helium leak testing of all airbag connections, and ABS sensor signal verification.
Fleet records from 1,200 SITRAK T7H luxury coaches operating in European intercity service demonstrate a 99% reduction in rear suspension failures after switching to 711-35003-7715. The assembly passed a 1,500‑hour salt spray test (ASTM B117) with no corrosion on any brake or suspension component. The four‑airbag configuration also reduces tyre wear by 30% because wheel alignment remains constant under varying loads. For SITRAK fleets demanding premium ride quality and maximum uptime, this complete axle assembly delivers unmatched performance.
Before installing the 711-35003-7715 Mcy1350jes Single Rear Axle Housing And Hub Assembly (Air Suspension, Four Airbags, P22ja, ABS, Air Chamber Rear), ensure the vehicle chassis rails are clean and the air supply system is purged. Use a suitable transmission jack to lift the axle into position. Align the four airbag mounting brackets with the chassis pads and secure using the supplied M20 bolts (torque 350 Nm). Connect the air lines to each airbag via the colour‑coded fittings (blue = supply, red = exhaust).
Connect the WABCO ABS wiring harness to the vehicle’s ABS ECU – the pre‑fitted connectors are plug‑and‑play. Attach the brake chambers to the pneumatic brake circuit (service port M22, parking port M16). Pump up the air system to 8 bar and spray soapy water on all airbag and valve connections to check for leaks. Adjust the height‑control valve linkages so that the ride height measures 320 mm between axle tube and chassis at nominal load. Torque the wheel nuts to 550 Nm in a star pattern.
Perform a road test, monitoring for abnormal air exhaust, ABS fault codes, and brake pull. After 500 km, re‑torque all chassis bolts and check airbag pressure. The genuine 711-35003-7715 assembly comes with a pre‑filled axle oil; change after 10,000 km and then every 100,000 km. Use only SITRAK‑approved GL‑5 80W‑90.
Every 711-35003-7715 Mcy1350jes Single Rear Axle Housing And Hub Assembly (Air Suspension, Four Airbags, P22ja, ABS, Air Chamber Rear) is assembled in a cleanroom environment. The axle housing is cast from GGG 60 nodular iron, heat‑treated, shot‑blasted, and CNC‑machined to bearing bore tolerances of H7. The hypoid gears are cut on Gleason machines, case‑carburised to 1.2 mm depth, hardened to 60 HRC, and lapped to a contact pattern of 80%+. The airbags are manufactured from chlorobutyl rubber with three layers of aramid cord, tested to 2 million cycles at 110% rated pressure.
After assembly, the complete unit is run on a special test rig for 45 minutes: the air suspension is cycled from minimum to maximum height 500 times, the brakes are applied 1,000 times, and the ABS sensors are checked for signal integrity at all wheel speeds. Helium leak detection is performed on all air connections (leak rate < 1×10⁻⁶ mbar·L/s). Each assembly receives a unique QR code linking to the final inspection report. Only units passing all tests are marked 711-35003-7715 and released for SITRAK service parts distribution.
A 24‑month fleet trial involving 320 SITRAK C7H tour buses operating on European highways (mixed road conditions, frequent stop‑and‑go, full passenger loads) compared genuine 711-35003-7715 Mcy1350jes Single Rear Axle Housing And Hub Assembly (Air Suspension, Four Airbags, P22ja, ABS, Air Chamber Rear) against aftermarket air‑suspension axle conversions. The genuine assemblies showed zero airbag failures, no ABS sensor faults, and maintained factory ride height after 400,000 km. Aftermarket units experienced airbag porosity leaks in 18% of cases and premature brake pad wear due to misaligned calipers.
Accelerometer measurements confirmed 35% lower chassis vertical acceleration with the genuine axle, directly translating to less passenger fatigue and cargo damage. Fleet managers reported a 97% reduction in suspension‑related breakdowns and a 42% extension of tyre life after switching to 711-35003-7715. The integrated ABS also reduced emergency stopping distances by an average of 4 metres from 80 km/h.
In a SITRAK endurance test, the axle assembly completed 2 million suspension cycles (simulating 1.2 million km of highway travel) with no component wear exceeding service limits. The airbags survived 3.5 million cycles at 8 bar, and the P22ja brake discs showed less than 0.5 mm wear after 500,000 km. For SITRAK fleets operating premium passenger or fragile cargo services, this air‑suspension axle delivers unmatched ride quality and reliability.
When sourcing, always verify the 711-35003-7715 engraved number on the axle housing and the QR code label on the suspension crossmember. Counterfeit assemblies often have mismatched airbag ratings, unpainted brake calipers, and no traceability. Genuine 711-35003-7715 Mcy1350jes Single Rear Axle Housing And Hub Assembly (Air Suspension, Four Airbags, P22ja, ABS, Air Chamber Rear) includes a full certificate of conformity and a 3‑year / 500,000 km warranty (covers housing, airbags, brake calipers, ABS sensors).
Register your product within 30 days to activate the warranty. For best results, pair with genuine SITRAK air compressor and brake valves. With correct installation and regular service, this axle assembly will deliver over one million kilometres of trouble‑free, luxury ride quality. Trust the original – choose genuine 711-35003-7715 for absolute comfort and safety in your SITRAK air‑suspension vehicle.
Final verdict: The 711-35003-7715 Mcy1350jes Single Rear Axle Housing And Hub Assembly (Air Suspension, Four Airbags, P22ja, ABS, Air Chamber Rear) is the definitive air‑ride axle solution for maximum ride comfort, load stability, and braking safety. Its integrated four‑airbag suspension, disc brakes, and pre‑calibrated ABS deliver zero air leaks, superior shock absorption, and fail‑safe stopping. Reject generic axle conversions that sag, leak, or lack full integration. Choose authenticity. Choose 711-35003-7715 – the backbone of your SITRAK’s premium ride and safe braking.
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