Excavator Hydraulic Pump

hitachi hydraulic pump parts:

1. The composition of the external feedback pressure-limiting variable vane pump: shell, bushing, stator, pump shaft, rotor, flow adjustment screw, control piston, needle roller bearing, slider, pressure limiting spring, pressure adjustment screw;

2. The hydraulic pump is a hydraulic power component in the hydraulic system. Its function is to convert the mechanical energy of the system {internal combustion engine or motor} into liquid pressure, and it is the power source of the hydraulic system. Hydraulic pump can be divided into tooth cooling pump, vane pump, plunger pump according to the structure;

3. There are many different uses of each pump. According to the different circuits, it can be divided into open pump, closed pump and so on. The core principle of hydraulic pump {Pastor's principle}: the liquid pressure is equal everywhere. That is, the pressure in the working pump cavity changes and reciprocates the oil suction and oil discharge.

Kyushan got all kinds of Hitachi excavator hydraulic pumps and pump parts for sale， you can send your inquiries with the excavator model numbers you need， we will reply as soon as possible.

Kyushan Specialized in hydraulic seals and seal kits for hydraulic hammer rock breaker, hydraulic excavator, wheel loader, and JCB backhoe loader. And, Our Company also supply Engine Parts, hydraulic piston pump and hydraulic travel motor, Swing motor assembly and hydraulic component parts, electric parts, etc. Hydraulic hammer breaker parts with piston, cylinder, chisel, through bolt, side bolt, top bush, front head bushing, accumulator, valve, etc. We always try our best for all our customers and make it better and better. Welcome!

As one of the "three major parts" (engine, cat 330 hydraulic pump, distribution valve) of an excavator, the "cat 330 hydraulic pump" can be regarded as an energy conversion device more often, which converts the mechanical energy from the engine into hydraulic energy, for The hydraulic system provides a certain flow of pressure oil to drive the hydraulic cylinder and hydraulic motor. It can be said that the hydraulic pump is the power source of the entire hydraulic system.

Precautions after replacing the new cat 320d hydraulic pump
(1) Pay attention to the discovery of abnormal phenomena at any time
Abnormal sounds, vibrations, or abnormal signals of the monitoring system must have their reasons. When an abnormal phenomenon is found, immediately find the circuit diagram, follow the diagram to find out, and carefully observe whether the abnormal phenomenon is caused by a temporary error. Assess the need for parking. For example, pressure, load, temperature, time, start-up, and stop all include the reasons that may cause abnormal phenomena. Usually, it should be analyzed and discussed item by item.

cat 320 excavator hydraulic pump Adjustment Method
1. The adjustment method of the maximum flow of the cat 320 excavator hydraulic pump:
According to the figure, we need to loosen the regulator lock nut 1 first, and adjust the screw 2 at the same time. Remember to adjust the direction of adjustment clockwise to increase the flow, and anti-clockwise to reduce the flow. During the adjustment process, it should be noted that when adjusting the maximum flow, the adjustment screw 2 should not be larger than 2 turns.

The cat 312 hydraulic pump is supplied with oil by the main pump driven by the engine. The main pump is divided into an upper pump and a lower pump, both of which are swash plate type plunger pumps. There is a main pump regulator behind each main pump. By changing the effective stroke of the plunger to the main pump, the displacement increases or decreases, that is, the power absorption capacity of the main pump is increased or decreased.

The main pump type used by the caterpillar excavator hydraulic pump is: variable displacement axial piston pump

Main pump maximum flow (L/min): 2×200

Walking hydraulic motor type: variable displacement axial piston motor (with mechanical brake)

Rotary hydraulic motor type: axial piston motor (with mechanical brake)

Variable piston pumps are divided into two types: axial variable piston pumps and radial variable piston pumps.

Our company specializes in selling a full range of Komatsu spare parts for Komatsu excavators: various supporting connecting rods, rockers, pins, bushings, tensioning devices, bucket teeth, side teeth, drive gear rings, rollers, supporting rollers, Idler, final drive assembly, slewing bearing, computer board, display screen, solenoid valve, relay, pressure switch. Cab door assembly, inner parts, hydraulic oil tank, seat assembly, PC200/300/400 original horse head, engine cover, glass, sealing strip, original maintenance filter element (air filter, diesel filter, machine filter, water filter) filter, hydraulic filter, etc.), wiper motor assembly, wiper assembly, ignition switch, glass block, radio, air conditioning panel, etc.

The main business of komatsu pc300 hydraulic pump are: komatsu pc300 hydraulic pump, distribution valve, self-pressure regulating valve, pilot valve, valve block, rotary reducer, rotary motor, rotary solenoid valve group, Komatsu hydraulic oil tank, hydraulic pump assembly, hand oil pump, distribution Valve assembly, grease fitting, rotary reducer, rotary reducer assembly, Komatsu series oil cylinder assembly, hydraulic pump nine-hole disc, etc.

The komatsu pc300 hydraulic pump sold by the company have many varieties and specifications. The main function of the Komatsu hydraulic parts is to drive the driving power and working power of the machinery. The structure of the Komatsu hydraulic parts is cumbersome and complicated. The company generally adopts rolling bearings or static pressure. Manufactured by sliding bearings, Komatsu hydraulic parts can only be started mechanically when they are in operation. The rotational inertia of Komatsu hydraulic parts is small, it is more convenient to start and brake, and its adjustment and reversing sensitivity is high.