4197033 Original Excavator Bucket Stopper Brake Components for ZX200

Part number 4197033 is a Hitachi original brake. According to public information, it belongs to the wet multi disc parking brake and is a key safety component of the excavator walking system. This part is mainly suitable for Hitachi ZAXIS series medium to large hydraulic excavators, such as ZAXIS330 and other models. The original part number is 4197033, which should be used as the reference for procurement. Due to differences in the structure, installation dimensions, and hydraulic circuit design of walking motors for different models of excavators, it is necessary to provide the complete model, serial number, and installation position of the brake for accurate verification before replacement.

This brake is the core device that ensures the safe parking and reliable braking of excavators. Its core function is to automatically apply brakes when the excavator is not in a walking state, preventing the equipment from sliding; During walking operation, hydraulic pressure is automatically released to achieve a smooth start. As an original component, it adopts a wet multi disc, normally closed design: the friction plate and the fixed plate are connected to the drive disc and the walking motor housing through splines, respectively, and are continuously compressed by high-performance disc springs to form reliable static friction braking. When operating walking, hydraulic oil from the main pump enters the brake piston chamber as brake release pressure oil, overcomes the spring force to push the piston, separates the friction plate from the fixed plate, and releases the brake.

The maintenance core of this brake is to regularly check the braking performance, monitor the wear of friction plates, and keep the hydraulic system clean. It is recommended to inspect the brake assembly every 2000 working hours or annually (whichever comes first), with a focus on measuring the wear thickness of the friction plates. When the wear exceeds the factory's specified limit (usually the remaining thickness is less than 2mm), it must be replaced as a complete set. Hydraulic system maintenance: It is crucial to maintain the cleanliness of the hydraulic oil. Regularly replace the hydraulic oil and filter element to prevent impurities from entering the brake piston chamber and causing jamming or leakage.