Regarding the replacement of the foam pump seal, the Foam Pump Suppliers(KEXON) gives the following replacement methods:
(1) Disconnect the plunger from the slider, unscrew the plunger plug of the pump head, loosen the compression nut, and insert the tire coupling to allow the slider to push the plunger out from the pump head. Pull out the plunger. Remove the lock nut and the compression nut and remove the guide sleeve and plunger seal. When reassembling, pay attention to the three sealing rings should be replaced in groups, the interface position should be staggered 1200, the front surface of the sealing ring should be coated with clean grease. Screw the compression nut on a few buckles, slowly apply the lubricant to the surface of the plunger, and then tighten the compression sleeve with the fork wrench to compress the plunger.
(2) Remove the pump head, take out the steel sleeve assembly, and then remove the plunger, nut, screw plug, plunger seal, etc., and then reassemble as described above.
3, upwelling maintenance
During the long-term operation of the pump, due to wear and corrosion, etc., the original accuracy and performance should be checked regularly. According to the actual situation, the vulnerable parts should be replaced and the original performance should be basically restored.
(1) The front and rear bearing pads of the connecting rod cannot be misplaced. The tightening torque of the connecting rod bolt is 120±5N?m. The screws should be cross-tightened and locked with a lock washer to prevent loosening.
(2) The crankshaft surface of each crankpin must be ground and polished before assembly. The crankshaft is mounted on two contour V-blocks with a width of about 2/3 of the crankshaft length. No. "iron sand paper wraps the journal around the entire circle, and then wraps a rope around the sand paper with a rope about 1 meter long. The two hands hold the one end of the rope separately, and the rope is stretched before and after the rope is pulled, and the metal is pulled. For the original color, replace the above-mentioned operation with the metallographic sandpaper, and use it until the surface is smooth and the nail is scraped without any unevenness.