3112309 Original Loader Sleeve for Hitachi ZW310-7

The original sleeve 3112309 is a specialized maintenance tool for Hitachi ZW310-7 wheel loader, and the universal number is its part number. This model is a 6-ton medium-sized loader with a total operating weight of approximately 22280kg, a rated load capacity of 8000kg, a bucket capacity of 3.3-4.2m ³, and a 220kW engine. As a key tool for daily maintenance and troubleshooting, the sleeve is mainly used for disassembling and installing bolts and nuts in chassis, working devices, and other parts. Its size specifications are completely matched with the ZW310-7 bolt system, ensuring the fit and torque transmission efficiency during disassembly and assembly.

This product is forged from high-strength chrome vanadium steel (CR-V), and after professional heat treatment, its hardness reaches 50-58HRC, possessing excellent impact resistance and wear resistance. The head of the sleeve is designed with hexagonal or twelve corner hole patterns, and the inner wall is precision machined. The contact surface with the bolt and nut is large, which can effectively prevent slipping and rounded corners. The surface is often polished or coated with a mirror finish, which also has anti rust function. As a part of the socket wrench assembly, it can be used in conjunction with accessories such as extension rods, sliding rods, ratchet wrenches, etc. It is particularly suitable for bolt operations in narrow spaces or deep concave positions of ZW310-7, and is a basic tool to ensure maintenance efficiency and safety.

After use, it is necessary to promptly remove oil and soil, and wipe with a dry cloth to avoid residual moisture causing rust. When stored for a long time, rust proof grease should be applied and placed in a dry toolbox. Regularly check the inner wall of the sleeve for wear, cracks, or deformation. If the size exceeds the tolerance or the edges are smooth, it should be replaced immediately to prevent slipping and damaging the bolts during tightening. Overloading (such as extending the lever to apply force) is strictly prohibited to prevent sleeve breakage or thread damage. It is recommended to use the torque wrench recommended by the original factory and operate according to the torque values specified in the ZW310-7 maintenance manual to extend the life of the socket and ensure the reliability of the connecting parts.