4897661320 Original Loader Hydraulic Oil Motor for ZW550-G

The original hydraulic oil motor (universal number 4897661320) is designed and used in conjunction with the Hitachi ZW550-G large wheel loader. This motor is the core executive component of the ZW550-G hydraulic transmission system, usually integrated into the vehicle's walking drive or working device rotation system. Its installation flange, shaft extension size, and oil port parameters are precisely matched with the main hydraulic circuit, ensuring efficient and reliable power transmission. This part number is the unique identifier of the assembly, and strict verification is required when ordering to ensure complete compatibility of replacement parts.

This product is a high-speed hydraulic motor with inclined shaft or radial piston, with a compact and sturdy overall structure, using high-strength cast iron or ductile iron housing. Its working pressure is high, with a rated pressure usually in the range of 30-35MPa and a peak pressure of over 40MPa, to meet the huge torque demand of ZW550-G under heavy load conditions. Multiple bolts on the surface of the shell are used to secure the end cap and internal components, ensuring overall sealing and pressure bearing capacity. The yellow component at the top may be an integrated flushing valve or pressure measuring connector used for system maintenance and diagnosis. The internal core friction pairs (such as plungers and port plates) adopt wear-resistant coating technology, which has the characteristics of high efficiency and long service life.

Every 250 hours of daily work, check the motor housing for any abnormal leaks and tighten the installation bolts to the specified torque. The hydraulic oil and return filter element need to be replaced after the first 500 hours of operation, and then replaced every 2000 hours or annually, ensuring that the oil cleanliness meets NAS level 9 or higher standards. During operation, pay attention to monitoring for any abnormal noise and monitor the system temperature (recommended not to exceed 80 ℃). The overhaul cycle is usually 8000-10000 working hours and needs to be carried out by professional technicians using original repair kits. Long term shutdown should start the equipment every month to allow the motor to run for a short period of time to prevent internal precision components from rusting. Overpressure use is strictly prohibited, and the hydraulic oil tank ventilation device must be ensured to be unobstructed.