YA00066719 Original Loader Gear Pump for ZW180-5A

Part number YA00066719, this is the original gear pump specially designed by Hitachi for the ZW180-5A wheel loader. Its universal model usually covers the same platform models as ZW180-5A, and may also be applicable to loaders with similar tonnage such as ZW180-5 and ZW160-5A, which have the same hydraulic system design. This component is the core power source of the hydraulic system for loader working devices such as buckets and booms. As the designated pump of the original factory, its installation flange, input spline specifications, inlet and outlet positions are completely matched with the power take-off device and valve block of the main engine. It is strictly prohibited to use gear pumps that are not from the original factory or have interfaces that do not match, in order to avoid insufficient system pressure, abnormal flow, or installation interference.

This product is a high-strength aluminum alloy shell gear pump. The pump body is made of silver gray precision cast aluminum alloy, which has good strength and lightweight characteristics. The silver part protruding from the upper part is the input shaft, with internal threads on the shaft end, used to connect with the power take-off of the engine or transmission through splines. The black component at the bottom is the rear end cover or integrated valve block of the pump, which is internally processed with inlet and outlet oil passages. Its core is a pair of gears that mesh precisely inside the pump chamber. Based on the feature of "no external oil outlet" described by you, this pump should be designed with an integrated valve block, with the inlet and outlet ports located on the plane where the valve block is combined. Its typical technical parameters include: working pressure up to 20-25MPa, displacement usually in the range of 20-40 cc/rev, optimized to meet the power requirements of the ZW180-5A working device.

Installation specifications: 1 Cleaning and inspection: Before installation, thoroughly clean the installation surface and input spline of the pump with a lint free cloth to ensure that there are no impurities. 2. Alignment installation: During installation, ensure that the pump shaft is absolutely aligned with the drive shaft, and the maximum coaxiality error should be ≤ 0.1mm. Guide sleeves can be used for assistance, and hitting the shaft end is strictly prohibited. 3. Torque tightening: Use a torque wrench to tighten the installation bolts in diagonal order and with the specified torque (usually 40-60 N · m). 4. Connection and exhaust: After installation, connect the hydraulic pipeline to ensure reliable sealing. Before starting for the first time, add clean hydraulic oil to the pump's drain port (if any) and run it slowly at low speed under no load to empty the air.