Assembled Sealing Washer
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OEM 1001251569 – Assembled Sealing Washer is a precision‑engineered composite seal designed for Shacman X5000 heavy‑duty trucks. This washer combines a metal outer ring with an elastomeric inner sealing lip, providing a reliable, leak‑proof seal for oil, fuel, and coolant connections. The authentic part number 1001251569 guarantees exact dimensional fit, material hardness, and crush resistance. Manufactured to Shacman’s stringent OEM standards, this assembled sealing washer prevents fluid leakage, reduces contamination ingress, and ensures long‑term reliability in high‑pressure and high‑temperature applications. It is a critical consumable for any professional engine repair, transmission overhaul, or hydraulic system maintenance on the X5000.
| Parameter | Specification |
|---|---|
| OEM Part Number | 1001251569 |
| Product Name | Assembled Sealing Washer / Composite Seal |
| Brand / Vehicle | Shacman X5000 (Heavy Duty Truck) |
| Material | Steel outer ring + NBR/FKM rubber sealing lip |
| Surface Treatment | Zinc‑plated steel ring (120h salt spray) |
| Inner Diameter (ID) | 14.0 mm ±0.1 mm |
| Outer Diameter (OD) | 20.0 mm ±0.2 mm |
| Thickness (overall) | 2.5 mm ±0.1 mm |
| Hardness (rubber, Shore A) | 70 ±5 |
| Temperature Range | -40°C to +135°C (NBR) / +200°C (FKM option) |
| Pressure Rating (max) | 30 bar (static seal) |
| Compatible Fluids | Engine oil, diesel fuel, coolant, transmission fluid |
| Certification | ISO 9001:2015, Shacman Genuine Parts Standard |
The assembled sealing washer 1001251569 is a multi‑layer composite: a zinc‑plated steel backing ring provides structural rigidity, while a precision‑molded elastomeric sealing lip (NBR or FKM) provides the actual fluid sealing. The rubber lip is chemically bonded to the metal ring, creating an inseparable assembly that cannot delaminate under pressure. This design eliminates the need for separate O‑rings and washers, reducing part count and simplifying assembly. The washer’s inner diameter is tailored to the bolt or fitting size, ensuring a snug fit that prevents side‑loading.
Compared to conventional copper or aluminum crush washers, the genuine Shacman assembled sealing washer offers superior elasticity and re‑usability (up to three installations if properly torqued). The rubber lip conforms to micro‑imperfections on the sealing surface, providing a leak‑tight seal even on scratched flanges. The steel backing distributes clamping load evenly, preventing damage to soft aluminum components. Each washer is 100% inspected for lip integrity, metal flatness, and overall thickness.
Fluid leaks in a heavy‑duty truck can lead to catastrophic failures: loss of engine lubrication, transmission overheating, hydraulic brake failure, or fuel fires. The assembled sealing washer 1001251569 is used in critical locations such as the oil drain plug, fuel filter head, coolant thermostat housing, and transmission pan bolts. Its ability to maintain a seal under thermal cycling and vibration ensures that no fluid escapes, even after thousands of operating hours. The genuine washer’s rubber lip has a compression set of less than 20% (ASTM D395), meaning it returns to its original shape after bolt loosening, unlike crush washers that become permanently deformed.
Additionally, the zinc‑plated steel ring resists galvanic corrosion when installed against aluminum or cast iron components. The rubber lip is compatible with all common truck fluids, including biodiesel (B20) and extended‑life coolants (OAT). Field data from Shacman service centers shows that using genuine 1001251569 washers reduces fluid leak incidents by 98% compared to reused or generic washers.
Installing the assembled sealing washer 1001251569 is straightforward. Clean the bolt and the sealing surface thoroughly, removing any old gasket material or debris. Place the washer onto the bolt (rubber side facing the component, steel side towards the bolt head or nut). Torque the bolt to the manufacturer’s specification – for an M14 fastener typical in Shacman engines, torque is 70–80 Nm. Do not exceed this range, as over‑tightening can extrude the rubber lip. The washer can be reused if it shows no signs of hardening, cracking, or permanent compression set; however, for critical applications, a new washer is always recommended.
After installation, run the engine or pressurize the system and inspect for any seepage. A properly installed washer will show no weeping even after hot/cold cycles. If a leak occurs, check for surface damage or debris; if the washer is undamaged, re‑torque to the correct value. Replace the washer if it has been in service for more than 5 years or if the rubber has become hard.
During each oil change or fluid service, inspect the sealing washer for cracks, flattening, or missing rubber. Always keep a small stock of genuine 1001251569 washers in your service truck. Do not use anaerobic sealant or thread tape with this washer – the rubber lip provides the seal, and additional sealants can cause false torque readings and leaks.
The Shacman X5000 operates in some of the most demanding environments: mining roads, construction sites, long‑haul highways, and arctic or desert conditions. The assembled sealing washer 1001251569 is engineered to withstand extreme temperatures (-40°C to +135°C for NBR, +200°C for FKM) without losing elasticity. In salt‑spray environments, the zinc‑plated steel ring resists corrosion for over 120 hours of ASTM B117 testing. The rubber lip is ozone‑resistant and does not crack under UV exposure, making it suitable for outdoor storage.
In high‑vibration applications (e.g., engine mounts or transmission pans), the washer maintains its sealing force due to the steel backing, which prevents the rubber from being squeezed out under cyclic loading. Fleet operators using genuine Shacman washers report fewer fluid top‑ups and a marked reduction in roadside breakdowns caused by leaks.
Generic sealing washers often use plain steel rings with a simple rubber O‑ring glued on, which can separate or twist during installation. The genuine 1001251569 washer is an integrally bonded assembly that cannot come apart. The rubber compound is specifically formulated for diesel engine applications, resisting fuel, oil, and coolant additives. The steel ring is precisely stamped to prevent sharp edges that could cut the rubber.
Using genuine Shacman parts protects your warranty and maintains the resale value of the vehicle. For fleet managers, standardizing on the 1001251569 washer simplifies inventory (one part fits multiple applications) and reduces the risk of using incorrect substitutes. The small cost premium of a genuine washer is negligible compared to the cost of a fluid leak cleanup, lost oil, or engine damage.
Each assembled sealing washer bearing OEM 1001251569 is produced in an IATF 16949 certified facility. The manufacturing process includes stamping the steel ring, shot blasting, zinc plating, and then injection‑molding the rubber lip directly onto the ring. Finished washers are 100% inspected for rubber adhesion (pull‑test), inner/outer diameter, and thickness. Random samples are subjected to compression set tests, salt spray tests, and thermal cycle tests. A certificate of conformance is available upon request.
The washer complies with RoHS and REACH. The rubber material meets ASTM D2000 classification for oil resistance. Using genuine Shacman components ensures that every seal performs to the original equipment specification, giving you peace of mind on the road.
The genuine assembled sealing washer 1001251569 is stocked in Shacman’s global parts centers (Xi’an, Dubai, Houston, Hamburg, Singapore). Standard packaging includes 10 washers per sealed polybag, with bulk boxes of 100 available. Orders are typically dispatched within 24 hours, with air freight options for urgent needs. The washer is also available through authorized Shacman dealers and online platforms such as shacman3000.com. For fleet maintenance programs, volume pricing and just‑in‑time delivery can be arranged.
The Shacman Assembled Sealing Washer 1001251569 is a small but essential component that prevents costly fluid leaks and ensures the reliable operation of your X5000. Its advanced composite design, precise manufacturing, and rigorous testing make it the ideal choice for oil, fuel, and coolant connections. By choosing this genuine OEM part, you invest in long‑term durability, environmental safety, and vehicle uptime. Keep a stock of genuine washers in your toolbox to ensure every repair is leak‑free.
