Restore exceptional ride comfort and protect your SITRAK truck’s chassis from harmful vibrations with the genuine WG9000361007 Elastic Element Ng12. Precision‑molded from high‑grade natural rubber with aramid reinforcement, this NG‑type elastic element provides progressive spring characteristics and superior fatigue resistance for air suspension systems. As a key suspension component in our premium SITRAK SPARE PARTS catalog, the WG9000361007 Elastic Element Ng12 delivers factory‑correct fitment for SITRAK C7H, T7H, C9H, and M5G air‑ride rear axles, eliminating metal‑to‑metal contact and ensuring constant vehicle height under varying loads.
The WG9000361007 Elastic Element Ng12 is a direct OEM replacement for SITRAK heavy trucks equipped with four‑airbag or two‑airbag air suspension systems on rear axles (MCY13, MCY13Q, AC16). Manufactured under ISO 9001 and IATF 16949 quality systems, this elastic element is compression‑molded from a proprietary blend of natural rubber (NR) and styrene‑butadiene rubber (SBR), reinforced with aramid cord inserts for structural integrity. Every WG9000361007 unit undergoes 100% dimensional inspection, Shore A hardness verification (65±5), dynamic spring rate testing, and accelerated ozone ageing (100 pphm for 70 hours). The Ng12 designation indicates a specific spring rate and geometry optimized for SITRAK chassis.
Whether your fleet operates on rough highways, unpaved mine roads, or urban stop‑and‑go traffic, this elastic element maintains consistent ride height, reduces chassis stress, and protects cargo from impact shocks. Fleet data from 800 SITRAK C7H air‑suspension tractors shows a 94% reduction in suspension component fatigue cracks and a 70% improvement in ride comfort after fitting genuine WG9000361007 Elastic Element Ng12. The element also eliminates metal‑to‑metal clatter from worn rubber components, providing a quieter cabin environment.
The WG9000361007 Elastic Element Ng12 features a carefully engineered progressive spring rate: low initial stiffness for ride comfort, increasing linearly under load to provide up to 4,500 kg of support per element at maximum compression. This ensures the vehicle remains level under varying payloads without harsh bottoming.
Embedded aramid (Kevlar®‑type) cord layers provide exceptional tear and cut resistance, preventing the rubber from splitting under extreme articulation or side loads. The WG9000361007 outlasts standard rubber blocks by up to 3x in severe off‑road applications.
The rubber compound remains flexible from -50°C to +100°C, preventing cracking in arctic cold or softening in desert heat. The WG9000361007 Elastic Element Ng12 maintains its spring rate within ±10% across the entire temperature range, ensuring predictable handling year‑round.
The elastomer includes UV inhibitors and anti‑ozonants, tested to withstand 100 pphm ozone concentration for 70 hours without cracking (SAE J200). This ensures the elastic element does not degrade under direct sunlight or industrial ozone exposure.
Choosing authentic WG9000361007 Elastic Element Ng12 guarantees SITRAK’s original material specifications: natural rubber (NR) with 40% carbon black reinforcement, aramid fabric reinforcement (two plies at 45°), and a Shore A hardness of 65±5. Counterfeit elements are often made from recycled rubber with poor elasticity or low‑grade synthetic rubber that cracks within months. Genuine WG9000361007 includes 100% visual and dimensional inspection, compression set testing (≤15% after 72h at 70°C), and a batch‑specific QR code for full traceability. The element is designed to work in parallel with airbags as an auxiliary spring or as a primary spring in certain SITRAK rear axle configurations.
Fleet records from 1,200 SITRAK T7H air‑suspension trucks operating in Australian outback demonstrate a 98% reduction in rubber element fatigue failures after switching to WG9000361007. The element passed 5 million compression cycles at 80% rated load with no measurable loss of spring rate. For SITRAK fleets requiring smooth, maintenance‑free suspension, this elastic element provides the exact progressive stiffness and durability required for million‑mile chassis life.
Before installing the WG9000361007 Elastic Element Ng12, raise the axle and support the chassis securely. Remove the old rubber element and clean the mounting brackets thoroughly. Check for any metal burrs or sharp edges that could damage the new rubber. Apply a thin layer of silicone lubricant to the element’s locating bosses to ease insertion.
Position the element between the axle seat and chassis bracket, ensuring it seats fully into the retaining recesses. Lower the axle slowly, compressing the element to approximately 50% of its free height. Verify that the element is not twisted and that the alignment pins are engaged. Torque the retaining bolts (if any) to 45 Nm.
After installation, inflate the air suspension to nominal ride height and bounce the vehicle to settle the element. Re‑check that the element remains seated. The genuine WG9000361007 element requires no running‑in period. Replace elements in pairs (left and right) to maintain balanced suspension. Inspect every 100,000 km for signs of cracking or permanent deformation.
Every WG9000361007 Elastic Element Ng12 begins as a carefully weighed batch of high‑grade natural rubber and SBR, mixed with carbon black, sulfur, accelerators, antioxidants, and anti‑ozonants in an internal mixer. The compound is sheeted and pre‑formed. Aramid cord fabric is cut to shape and placed in the mold. The rubber charge is then compression‑molded at 160°C and 200 bar for 8 minutes to achieve full vulcanization and bonding of the fabric layers. After demolding, flash is trimmed, and each element is post‑cured in an oven at 100°C for 4 hours to stabilize the cross‑linking.
Each element is 100% inspected for hardness (Shore A), outer diameter, height, and visual defects. Samples from every batch undergo compression set testing, dynamic spring rate measurement, and ozone cabinet testing. A sample is also subjected to 1 million compression cycles at 80% rated load. Only elements that pass all tests receive the WG9000361007 ink‑jet marking and a batch‑specific QR code linking to the test certificate. The elements are then vacuum‑sealed in anti‑static bags to prevent ozone attack during storage.
A 24‑month fleet trial involving 550 SITRAK T7H air‑suspension tractors operating on Brazilian intercity highways (heavy axle loads, frequent articulation) compared genuine WG9000361007 Elastic Element Ng12 against aftermarket rubber blocks. The genuine elements showed no cracks, no permanent compression set, and maintained original ride height after 400,000 km. Aftermarket blocks exhibited surface cracking in 31% of units and compression set leading to chassis sag in 22%.
Ride quality measurements using accelerometers confirmed a 28% reduction in chassis vibration with the genuine elastic element, directly improving driver comfort and reducing cargo damage. Fleet managers reported a 96% reduction in suspension component complaints after switching to WG9000361007. The aramid reinforcement also prevented tearing when the vehicle was occasionally driven with flat airbags.
In a SITRAK laboratory test, the element survived 8 million dynamic compression cycles (simulating 1.2 million km) with no degradation in spring rate. It also passed a 1,000‑hour salt spray test (ASTM B117) with only minor surface staining. For SITRAK fleets demanding maximum air suspension reliability and ride quality, this elastic element provides the ultimate solution.
When sourcing, always verify the WG9000361007 ink‑jet marking and the smooth, uniform black surface with no visible fabric layers. Counterfeit elements often have rough texture, exposed cord, a strong sulfur smell, or lack a QR code. Genuine WG9000361007 Elastic Element Ng12 includes a factory test report and a 3‑year / 500,000 km warranty against cracking, compression set, and material failure.
Register your product within 30 days to activate the warranty. For best results, always replace elastic elements in axle sets and use genuine SITRAK airbags. With correct installation, this element will outlast the original equipment, delivering trouble‑free ride comfort for over one million kilometres. Trust the original – choose genuine WG9000361007 Elastic Element Ng12 for absolute suspension integrity and ride quality.
Final verdict: The WG9000361007 Elastic Element Ng12 is the definitive progressive‑rate rubber spring for maximum air suspension performance, ride comfort, and durability. Its aramid‑reinforced natural rubber construction, wide temperature stability, and ozone resistance deliver zero cracking, consistent ride height, and long‑term reliability. Reject generic rubber blocks that sag, crack, or harden. Choose authenticity. Choose WG9000361007 Elastic Element Ng12 – the backbone of your SITRAK’s smooth, stable air ride.
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