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The 612600082030 Sealing Ring is a genuine OEM elastomeric seal manufactured by SINOTRUK Homan for heavy‑duty diesel engines. This precision‑molded seal provides a leak‑tight interface between stationary and moving components, preventing oil leakage and contamination ingress in critical engine applications. For guaranteed compatibility and performance, always choose genuine Sinotruk Homan parts. The 612600082030 sealing ring is engineered from high‑grade nitrile rubber (NBR) with excellent oil resistance and a wide operating temperature range, ensuring reliable sealing throughout the engine’s service life.
This sealing ring is typically used on crankcase ventilation ports, timing gear covers, oil filler necks, and cylinder head access plugs on SINOTRUK Homan HOWO, A7, T7H, and C7H trucks equipped with 10L, 12L, and 13L diesel engines. Its precise cross‑section and controlled hardness (70 Shore A) guarantee a perfect press‑fit seal, preventing oil weepage even under high crankcase pressures and thermal cycling.
A failed or hardened sealing ring allows oil to escape, leading to messy leaks, low oil levels, and potential engine damage. Replacing a degraded seal with the genuine SINOTRUK Homan 612600082030 restores the original sealing integrity, protects engine components, and extends service intervals.
| Parameter | Specification |
|---|---|
| OEM Number | 612600082030 |
| Brand | SINOTRUK Homan (Genuine OEM) |
| Product Type | Elastomeric Sealing Ring / O‑Ring / Gasket Ring |
| Material | Nitrile Butadiene Rubber (NBR) – 70 Shore A |
| Cross‑Section Diameter | 3.0 mm ±0.05 mm |
| Inner Diameter | 45.0 mm ±0.10 mm |
| Outer Diameter | 51.0 mm ±0.15 mm |
| Tensile Strength | ≥ 12 MPa |
| Elongation at Break | ≥ 300% |
| Compression Set (22h/100°C) | ≤ 20% |
| Operating Temperature Range | -40°C to +110°C (+230°F) |
| Oil Resistance (ASTM D471) | Volume swell ≤ 15% (IRM 903, 72h/100°C) |
| Hardness (Shore A) | 70 ± 5 |
| Applications | Crankcase breather covers, timing gear housing seals, oil filler neck, cylinder head access plugs |
| Compatible Models | SINOTRUK HOWO, A7, T7H, C7H (10L, 12L, 13L engines) |
| Standards | ISO 9001:2024, ISO 3601‑1 (O‑ring dimensions) |
The 612600082030 Sealing Ring may be small, but its contribution to engine reliability is enormous. It is installed between stationary engine components (such as the timing cover and the cylinder block) or around removable plugs, creating a gas‑ and oil‑tight barrier. Even microscopic leakage can lead to oil consumption, environmental contamination, and a gradual drop in oil pressure.
On SINOTRUK Homan engines, the crankcase ventilation breather cover uses this sealing ring to prevent oil mist from escaping into the atmosphere while allowing blow‑by gases to be directed back into the intake. A hardened or cracked seal will allow oil to weep down the engine block, creating a messy and potentially hazardous leak near hot exhaust components.
The genuine sealing ring is made from premium NBR compound with an optimized cross‑section profile that ensures even compression when the cover bolts are torqued to specification. Its 70 Shore A hardness balances sealing force with ease of installation, and the material retains its elasticity even after thousands of thermal cycles from cold starts to full operating temperature.
Each 612600082030 sealing ring is produced using computer‑controlled compression molding with matched metal dies to ensure exact dimensional consistency. The raw NBR compound is mixed in‑house following a proprietary recipe that includes anti‑ozonants and thermal stabilizers. After molding, each ring is flash‑trimmed and 100% visually inspected.
Random samples from each batch are subjected to tensile testing, hardness verification (Shore A durometer), and compression set measurement (22 hours at 100°C). The oil resistance is validated per ASTM D471 by immersing samples in heated engine oil and measuring volume swell. Rings that meet all criteria are batch‑coded for traceability and packed in sealed, anti‑static bags.
Genuine SINOTRUK Homan sealing rings are dimensionally inspected using optical comparators to ensure the cross‑section matches the original design. Counterfeit seals often have irregular profiles, which can lead to uneven compression and immediate leakage. The genuine 612600082030 provides a perfect fit every time.
Replacing the 612600082030 sealing ring is a straightforward job when the cover or plug is removed for service. Thoroughly clean the groove and the mating surfaces of any old gasket material, oil residue, or dirt. Inspect the groove for burrs or nicks that could cut the new seal.
Lightly lubricate the new sealing ring with clean engine oil before installation. This prevents the rubber from twisting or pinching during assembly. Place the ring into its groove, ensuring it lies flat without any twist. Install the cover or plug and torque the fasteners to the workshop manual specification (typically 25‑35 Nm for M8 bolts).
After assembly, run the engine and check for leaks around the sealed joint. If oil seepage is observed, the sealing ring may have been pinched or the groove may be damaged. Never reuse an old sealing ring – once compressed, the rubber takes a permanent set and loses its sealing ability. Always use a new 612600082030 when reassembling.
Aftermarket sealing rings are often made from lower‑grade rubber (e.g., cheap neoprene) that hardens and cracks after a few heat cycles. They may also have incorrect hardness (too soft leads to extrusion; too hard leads to poor sealing). The genuine 612600082030 uses premium NBR with precise shore hardness, ensuring a durable, leak‑free seal for the life of the engine.
Counterfeit seals frequently have flash or parting line irregularities that create leak paths. The genuine SINOTRUK Homan ring is flash‑free and molded to a smooth surface finish. In addition, genuine seals are packaged with the SINOTRUK Homan logo and a QC sticker. Using a fake seal can result in oil leaks, engine fires (oil on hot manifolds), and voided warranty.
SINOTRUK Homan provides a 12‑month warranty against manufacturing defects. Invest in genuine parts for peace of mind and maximum engine protection.
Warning signs that the sealing ring 612600082030 requires replacement include: visible oil weeping around the cover or plug, a noticeable drop in engine oil level between changes, a burning oil smell (oil hitting hot exhaust), and the rubber becoming hard, brittle, or cracked upon inspection.
Preventive replacement is recommended every 6,000 operating hours or whenever the associated cover is removed for other repairs. The cost of a genuine sealing ring is minimal compared to the cost of cleaning up an oil leak or replacing a damaged engine component. Always keep a stock of 612600082030 rings in your parts inventory.
During regular service (oil changes, valve adjustments), inspect all accessible sealing rings for cracking or hardening. Replace any that show signs of aging. A small investment in new seals prevents major oil loss and environmental contamination.
The 612600082030 Sealing Ring is stocked in SINOTRUK Homan regional warehouses worldwide. Standard air freight delivers within 3‑7 business days. Expedited shipping (1‑2 days) is available for urgent repairs. Bulk orders (100+ rings per box) receive volume discounts and can be shipped via sea freight.
Each sealing ring is supplied in a sealed plastic bag with a part number label and QR code for authenticity verification. For large fleets, consignment stock programs are available to ensure immediate availability. Don’t let a leaking seal compromise your engine’s cleanliness or reliability.
Order the genuine SINOTRUK Homan 612600082030 Sealing Ring today and ensure a leak‑free, reliable engine that performs at its best mile after mile.
Summary: The SINOTRUK Homan Sealing Ring (OEM 612600082030) delivers precision sealing for crankcase, timing cover, and oil filler applications. Trust this genuine component to keep your engine oil where it belongs – inside the engine.
If you have any questions about our products, services, or anything related to what we offer, please don’t hesitate to leave us a message—our dedicated team is always ready to provide prompt and helpful responses to address your concerns. What’s more, when you become our valued customer, we’re delighted to offer you complimentary catalog services, giving you access to detailed, up-to-date information on our full range of products, specifications, and offerings to help you make informed decisions.
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