10275621 Adjusting shims Sany SY1350C1C3KH Tracked hydraulic excavator spare parts

10275621 Adjusting shims Sany SY1350C1C3KH Tracked hydraulic excavator spare parts

10275621 is an adjustment shim with a Sany original part number, compatible with 125-ton mining excavators such as the SY1250H. It integrates a high-strength spring steel base material, precision stamping structure, and rust- and corrosion-resistant surface layer. It is a key precision component in the assembly of core parts such as hydraulic pumps/motors, slewing mechanisms, and travel gearboxes. Primarily used in large open-pit coal mines and metal mines for excavation and topsoil stripping operations, it eliminates accumulated assembly errors in shafts, gears, and bearings through micron-level thickness adjustment, ensuring precise meshing clearance and preload, preventing abnormal noises, overheating, and jamming during heavy-duty operations. It also protects core assemblies such as the SSY008347233 slewing platform and the SY1250C2C3KH slewing device. Suitable for mining conditions characterized by high temperatures, high dust, strong vibrations, and large temperature differences, it is a crucial original part for reducing maintenance costs and improving operational efficiency in mines.

Core technical parameters

Model: 10275621
Main material: Made of 65Mn spring steel or 60Si2Mn high-strength alloy spring steel, processed by professional heat treatment process, with hardness reaching HRC45-50, tensile strength ≥1500MPa, and excellent fatigue resistance and deformation resistance.
Operating temperature: -30℃ to 120℃; no brittleness or deformation at low temperatures; maintains good elasticity and structural stability at high temperatures.
Key operating parameters: Precision ultra-thin series with thickness specifications of 0.1–0.5mm (common specifications: 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm), dimensional tolerance ±0.01mm, enabling micron-level precise gap adjustment; flatness ≤0.02mm, uniform stress distribution, can be used in multiple layers to flexibly compensate for assembly gaps of 0.1–1.0mm; compression resilience ≥85%, no plastic deformation under long-term load, meeting ISO 10567 heavy-duty equipment assembly accuracy standards; adaptable to the standard outer and inner diameters of corresponding mounting positions, seamlessly fitting with original bolts, shaft shoulders, and bearing seats.
Structural Design: Utilizing a precision stamping one-piece molding structure, the edges are smooth and burr-free, preventing scratches on precision components such as shafts and bearings; the surface is flat and smooth, with high fit, allowing for a tight fit to the mounting surface and preventing impurities from entering gaps and affecting assembly accuracy; without excess protrusions, it adapts to the compact installation space of hydraulic and transmission systems, without interfering with the machine’s wiring harnesses and pipelines; it can be used individually or in multiple stacks according to assembly needs, flexibly adjusting the gap size to accommodate the maintenance of components with different degrees of wear.
Shape and Dimensions: The overall shape is a flat ring (with mounting holes), perfectly matching the corresponding assembly parts (shaft end, bearing housing, end cover); the specific outer diameter, inner diameter, and mounting hole positions are precisely adapted to the hydraulic pump/motor and slewing device shaft system of the SY1250H excavator, with a mounting hole position accuracy of ±0.05mm.

Core functions and roles

As the “precision adjustment core” of Sany’s large mining excavators, its core function is to eliminate accumulated assembly errors of core components such as shafts, gears, and bearings through precise thickness adjustment, ensuring that meshing clearance and preload meet standards, and guaranteeing transmission efficiency and connection stability. In scenarios such as large open-pit mines and water conservancy projects, it not only optimizes the precision of component fit and reduces abnormal noise and wear caused by heavy-load impacts, but also protects core assemblies such as slewing devices and hydraulic pumps/motors, preventing component damage caused by excessive or insufficient clearance, and extending the service life of the entire machine. At the same time, as a wear part, its convenient replaceability can quickly restore the equipment’s assembly precision, reduce downtime for maintenance, and lower operating costs.

Applicable Scenarios

Widely used in precision components such as hydraulic pump/motor end covers, slewing bearing connections, travel gearbox shaft ends, and gearbox assembly in 125-ton mining excavators like the Sany SY1250H, it is also suitable for the assembly and maintenance of transmission and hydraulic systems in other large-scale Sany engineering machinery. Particularly suitable for 24-hour continuous heavy-duty operation in harsh conditions (high dust, strong impact, large temperature differences between day and night) in open-pit mines and large-scale earthmoving projects, it is an essential precision component for equipment manufacturing, overhaul, upgrades, and fault repair. Simultaneously, it is compatible with commercial scenarios such as after-sales maintenance and bulk parts procurement. Its original factory compatibility and high reliability can significantly reduce modification costs and downtime.

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1 SSY008347233 Slewing Platform
2. Platform Supervisor Lu
5 SSY004911131 1250 Cab Assembly
6. Rotary Mechanism
8 SSY007450352 Counterweight Assembly
9 10275621 Adjusting shims
10 10450540 Washer
11 SSY004981300 Counterweight Bolt
18 Body panel assembly

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