Causes of failure of one-way manual hydraulic oil pump and its treatment

Causes and Treatments of Failure of One-Way Manual Hydraulic Oil Pump Maintenance and Maintenance The various parts of the oil pump are often kept clean. Dust and dirt are not allowed around the valves and around the plunger.

Strictly observe safety precautions.

The working fluid is YB-N32. When the hydraulic oil temperature is lower than 10°C, hydraulic oil YB-N22N can be used instead. Do not use water or corrosive media.

The working fluid must be filtered and cleaned with a 120-160 mesh filter.

Use with care, no collision. The lever should be tightened so as not to damage the screw.

When used, non-painted surfaces should be coated with a layer of industrial petrolatum to prevent rust.

When not in use, it should be packed into a wooden box and stored in a dry and temperature-friendly room.

The high-pressure rubber hoses that are selected by the user are subjected to a withstand voltage test with a rated pressure of 1.25 times. Aging of the gums, long-term use of carved bone, should pay attention to regular inspections, inspection once a year. When a pressure test is carried out, leakage, bumps or blasting must be replaced. When using, should avoid sharp bends, and can not be too close to the hose, in order to prevent the blasting from wounding.

Pump failure and troubleshooting

The phenomenon of failure

main reason

Elimination method

1, lack of pressure or no pressure. When the lever is shaken, the cylinder does not work or the rated pressure cannot be output. 1, the high pressure valve pressure adjustment is too low Check the pressure of the hydraulic system with a pressure gauge, if the pressure is less than 63MPa can tighten the pressure valve screw, so that the pressure reaches the specified value. 2. High-pressure valve spring is damaged or loses elasticity. Replace high-pressure valve spring. 3. High-pressure valve is worn with slight wear. Revise the method: Correct the method: Tap the steel ball with precision one time 1-2 times, such as wear Seriously, it can be re-drilled with a drill bit, if serious pump body scrapped again. 4, the unloading valve Ver port has a slight wear repair Versailles, the revised method: hand tapping the first precision ball 1-2 times, such as serious wear, can be re-drilled with a bit, such as a serious pump Retired. 5. Replace the plunger hole of the oil pump and replace the plunger to correct the plunger hole. 2. The oil pump suddenly drops in volume and pressure during use. 1. The high pressure spring is permanently deformed or broken. Replace the high pressure valve spring 2. The low pressure valve spring is permanently deformed or broken. Replace the low pressure valve spring 3. The low pressure valve contains impurities that damage the check valve, check valve and low pressure valve. Hermetically dissociated oil pump, cleaned with gasoline or light oil, reassembled and inject clean fluid 3, the oil pump reduces the amount of oil, the pressure at low pressure is insufficient or there is no pressure. 1. The low pressure valve spring is damaged or the spring force is replaced to replace the low pressure valve spring 2. The low pressure valve has a slight wear correcting valve, and the oil supply is interrupted and weak noise occurs. 1, the oil level is too low, absorb air to fill the oil, increase the oil level 2, the suction inlet is blocked to remove impurities from the suction inlet, 3, the air release valve is closed, the air pressure in the oil storage tube is reduced, the air release valve is opened, and the plunger and the pressure rod are automatically returned bomb. 1, one-way valve Ver port has a slight wear correction Ver Port 2, check valve spring loses elasticity or damage replace one-way valve spring 3, one-way valve valve er mouth particle impurity cleaning check valve 6, static pressure When used, the pressure drops slowly. Failure of each seal to check the seals, tighten the screws or replace the apron 7, there is pressure phenomenon. Insufficient exhaust air pressure pump several times to rule out the stomach