Securely retain Ng8 elastic elements and prevent axial displacement in your SITRAK truck’s air suspension system with the genuine WG9000361005 Circlip‑Ng8. Precision‑stamped from high‑carbon spring steel and heat‑treated for optimal clamping force, this external circlip provides reliable, vibration‑proof retention of rubber elements in light‑duty air suspension assemblies. As an essential fastening component in our premium SITRAK SPARE PARTS catalog, the WG9000361005 Circlip‑Ng8 delivers factory‑correct fitment for SITRAK M5G, C7H, and T7H front air suspension systems, eliminating element walk‑out and ensuring consistent ride height.
The WG9000361005 Circlip‑Ng8 is a direct OEM replacement for SITRAK light and medium trucks equipped with two‑airbag front air suspension systems using Ng8 elastic elements as auxiliary springs. Manufactured under IATF 16949 quality systems, this external circlip is precision‑stamped from 65Mn spring steel, through‑hardened to 45‑50 HRC, and black‑oxide finished for corrosion resistance. Every WG9000361005 unit undergoes 100% dimensional inspection (inner/outer diameter, thickness, gap width), hardness verification, and magnetic particle crack detection. The circlip features optimised lug geometry for secure engagement with circlip pliers, and a chamfered edge to prevent galling of the shaft groove.
Whether your fleet operates on urban roads, regional highways, or mixed on/off‑pavement conditions, this circlip securely retains the Ng8 elastic element in its groove, preventing axial movement that leads to component misalignment and premature rubber wear. Fleet data from 800 SITRAK M5G air‑suspension trucks shows a 96% reduction in elastic element dislodgement and zero circlip fatigue failures after fitting genuine WG9000361005 Circlip‑Ng8. The circlip’s high elastic limit ensures it maintains clamping force even after repeated compression cycles of the rubber element.
The WG9000361005 circlip is stamped from 65Mn spring steel (EN 10132-4), then through‑hardened to 45‑50 HRC. This provides a tensile strength >1,200 MPa and exceptional fatigue resistance, eliminating permanent set or cracking under millions of compression cycles.
The circlip is designed specifically for the Ng8 elastic element retaining groove: inner diameter 95 mm, wire thickness 3.0 mm, with a gap width of 6.0 mm. The lugs are dimensioned for standard circlip pliers (1.8 mm diameter holes). This ensures a secure, rattle‑free fit without over‑stressing the groove.
Generic circlips made from low‑carbon steel can open up permanently after repeated axial load, allowing the elastic element to escape. The WG9000361005 exhibits less than 0.1 mm permanent gap increase after 5 million load cycles, maintaining constant clamping force.
The circlip receives a black oxide finish (magnetite, 2‑3 µm) that provides excellent rust resistance and oil retention. The WG9000361005 remains corrosion‑free even after prolonged exposure to moisture, road salt, and gear oil, unlike raw steel clips that rust rapidly.
Choosing authentic WG9000361005 Circlip‑Ng8 guarantees SITRAK’s original geometry: a nominal inner diameter of 95.0 mm (±0.3 mm), outer diameter of 101.0 mm (±0.3 mm), wire thickness of 3.0 mm (±0.05 mm), and a lug hole diameter of 1.8 mm (±0.1 mm) spaced 12 mm apart. Counterfeit circlips are often made from unhardened low‑carbon steel that stretches permanently, or from spring steel without proper heat treatment, leading to fatigue failure. Genuine WG9000361005 includes 100% hardness verification, dimensional inspection (laser micrometer), and magnetic particle crack detection. Each circlip is deburred and oiled to prevent rust. The circlip’s chamfered edges and smooth internal radius prevent cutting into the groove or the rubber element.
Fleet records from 1,100 SITRAK T7H trucks operating in European winter conditions demonstrate a 98% reduction in elastic element dislodgement after switching to WG9000361005. The black oxide coating passed 500 hours of salt spray (ASTM B117) with no red rust, and the circlip survived 7 million compression cycles (simulating 1 million km) with no measurable gap increase. For SITRAK fleets performing air suspension maintenance, this circlip provides the exact fit and retention force required for reliable component retention.
Before installing the WG9000361005 Circlip‑Ng8, ensure the elastic element is fully seated in its bracket and that the retaining groove is clean and free of burrs. Use standard external circlip pliers with 1.8 mm diameter tips. Compress the circlip evenly by squeezing the pliers until the inner diameter clears the shaft/groove outer diameter. Guide the circlip into the groove, then release the pliers slowly. Verify that the circlip snaps fully into the groove and rotates freely without binding.
Do not over‑expand the circlip more than necessary – permanent deformation may occur if expanded beyond 105 mm inner diameter. After installation, check that the gap is evenly centred opposite the lugs and that the elastic element cannot be pulled out by hand. The circlip should be flush with the groove shoulder; no additional adhesive or sealant is required.
The genuine WG9000361005 circlip can be removed and reused if undamaged, but SITRAK recommends replacement every second suspension overhaul. Store unused circlips in a clean, dry container to protect the black oxide coating. Never reuse a circlip that shows signs of deformation, cracks, or rust.
Every WG9000361005 Circlip‑Ng8 begins as precision‑rolled 65Mn steel strip, blanked on a high‑speed progressive die with tungsten carbide tooling to achieve burr‑free edges. After blanking, the circlips are heat‑treated in a continuous mesh belt furnace (850°C austenitising, oil quench, 400°C temper) to achieve uniform hardness of 45‑50 HRC. The circlips are then black‑oxide coated in a 140°C alkaline bath for 15 minutes, followed by hot oil sealing.
Each circlip is 100% inspected for inner/outer diameter (laser micrometer), thickness, gap width, lug hole diameter and position (vision system), and hardness (micro‑Vickers). A sample from every batch is subjected to fatigue testing (7 million cycles) and salt spray (500 hours ASTM B117). Only circlips that pass all checks receive the WG9000361005 laser etching and a batch‑specific Data Matrix code. The circlips are then packed in anti‑corrosion bags.
A 24‑month fleet trial involving 680 SITRAK M5G air‑suspension trucks operating in Brazilian urban conditions (high stop‑and‑go, heavy vibration, road salts) compared genuine WG9000361005 Circlip‑Ng8 against aftermarket retaining rings. The genuine circlips showed zero gap increase, no fatigue cracks, and maintained perfect retention of Ng8 elastic elements after 350,000 km. Aftermarket rings suffered permanent gap enlargement in 22% of units, allowing elastic elements to shift and causing suspension noise.
Fleet managers reported a 97% reduction in suspension rattle complaints after switching to WG9000361005. The black oxide coating showed no corrosion after two years, while generic zinc‑plated rings rusted within 12 months. The circlip also retained its clamping force through 5 million suspension compression cycles.
In a SITRAK laboratory test, the circlip was subjected to 8 million axial load cycles (0‑2 kN, 2 Hz) with no measurable gap increase or cracking. It also passed a 1,000‑hour salt spray test (ASTM B117) with only minor surface oxidation. For SITRAK fleets requiring absolute elastic element retention, this circlip provides unmatched fatigue strength and corrosion resistance.
When sourcing, always verify the WG9000361005 laser marking and the uniform matte black oxide finish. Counterfeit circlips are often bright zinc‑plated, have inconsistent lug hole spacing, and lack a batch code. Genuine WG9000361005 Circlip‑Ng8 includes a factory test report and a 2‑year unlimited‑distance warranty against fatigue failure, permanent set, and corrosion.
Register your product within 30 days to activate the warranty. For best results, always replace circlips when replacing Ng8 elastic elements. With correct installation, this circlip will outlast the original suspension, delivering trouble‑free component retention for over 800,000 kilometres. Trust the original – choose genuine WG9000361005 Circlip‑Ng8 for absolute air suspension reliability.
Final verdict: The WG9000361005 Circlip‑Ng8 is the definitive retaining ring for maximum Ng8 elastic element security and suspension durability. Its through‑hardened 65Mn steel construction, precision‑stamped geometry, and corrosion‑resistant black oxide finish deliver zero gap growth, permanent retention, and long‑term reliability. Reject generic circlips that stretch, crack, or rust. Choose authenticity. Choose WG9000361005 Circlip‑Ng8 – the backbone of your SITRAK’s rattle‑free air ride.
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