Glasses plate and cutting ring is a kind of vulnerable parts used in concrete machinery and equipment such as drag pump, pump truck and on-board pump. During the conveying process of concrete, the cutting ring and the spectacle plate run between the two feeding holes alternately due to the feeding and feeding back and forth. The interaction between the spectacle plate and the cutting ring will produce frequent impacts. Therefore, it needs to be replaced frequently. How to correctly replace the spectacle plate cutting ring?

1. Replacement of cutting ring: if serious slurry leakage occurs when pumping concrete and affects normal operation, replacement of cutting ring should be considered.
a. Turn off the diesel engine, cut off the main power supply, release the accumulator pressure, and take out the hopper screen.
B. after removing the baffle of the bolt, loosen the nut for 20mm, please do not loosen too much, otherwise when the s tube moves back, the s tube sleeve (discharge port side) will withdraw from the dust ring in the bearing seat, damaging the seal, failing to seal the mortar, and affecting the service life of the s tube.
c. Loosen the nut and remove the discharge port.
d. Pry the S pipe towards the outlet. The gap between the cutting ring and the spectacle plate is about 20mm, and the cutting ring is taken out.
E. check whether the installed rubber spring is worn, if damaged, please replace it at the same time.
f. Fit new cutting ring.

2. Replacement of glasses plate:
a. Repeat the procedure of replacing the cutting ring
B. Unscrew all the mounting bolts of the glasses plate respectively.
c. after a slight vibration can be removed glasses plate.
d. Install a new spectacle plate and tighten the mounting bolts of the spectacle plate respectively.
Note: Excessive wear of the cutting ring is easy to cause slurry leakage or pipe blockage. At this time, new accessories should be replaced as soon as possible to avoid damage to the cutting ring.