conveying cylinder piston is generally made of polyurethane, it has the advantage of elastic, wear-resisting and so on. conveying cylinder inner wall is plated with wear-resisting material.
There are generally two kinds of lubrication methods for piston and conveying cylinder: one is automatic lubrication, the system fill lubricating oil in each pump.The other is manual lubrication, need manual refueling regularly.For automatic lubrication, it is necessary to check the oil circuit regularly, once the oil circuit is blocked, the piston and the conveying cylinder will accelerate wear;For manual lubrication, the operator should replenish the lubricant regularly, usually replenish once an hour. Remember: when refueling, be sure to move the piston to the bottom of the vertical refueling point, so that the oil right into the middle of the piston groove.
In the transmission of concrete pumping, the operator will regularly do "suppress" cylinder operation, means when the main oil cylinder piston move to the end, inch button, keep 5 ~ 8 s, to refueling hydraulic oil for the closed oil chamberof main oil cylinder (for the pump rely on the proximity switch to reverse, the switch should be close to the main oil cylinder side), to make full use of conveying cylinder stroke, avoid localize wear.
Operators should pay attention to the water tank, once the water is turbid or with sand in the water, indicating that the piston mayb is worn, need to be replace in time, otherwise it will make the piston and conveying cylinder wear heavily.If after replace a new piston, the water become turbid soon, it indicates that the cylinder has been worn, need to replace the cylinder.If possible, you can measur the cylinder diameter to confirm if conveying cylinder is worn or not. Generally, the thickness of cylinder inner wall chromium plating layer is only (0.2-0.25)mm. When the cylinder diameter increase to (0.45-0.55)mm, it is should replace the conveying cylinder.
Besides,The water temperature of the cooling water in the water tank is also very important, if the water temperature is too high, will aggravate the wear of piston, So need replace the cooling water in the water tank regularly.