Most concrete mixer wear problems result from a failure to keep the interior and exterior of the mixer clean and to adjust the mixing components to the correct tolerances.

The following Concrete Mixing Plant Maintenance Tips are general recommendations suitable for most industrial concrete mixers. Mixer operators need to read the operation and maintenance manual supplied with their mixer before the operation begins. The concrete mixer service and maintenance tips below may differ from your specific product recommendations. Always follow your manufacturer's recommendations.

Daily supervision should follow the following tips which are mentioned below:

  • The check mixer is empty before morning starts.
  • Make sure there is no waste concrete on the floor or walls of the mixer. Remove build-up if necessary.
  • Operate high-pressure washing each time there is an extended pause in production.
  • At the end of daily work, clean the mixer with a high-pressure washer and wand.
  • Check to see that the discharge chute is also clean.
  • Check cement wet hopper discharge valve is free of buildup through the inspection panel at the base of the weight hopper.
  • When cleaning any buildup on mixer arms, mixing blades, scraper blades, and wall and floor tiles, do not use metal hammers because these items are cast iron and therefore brittle. Use a plastic head hammer.
  • Make sure the door seal is free of track buildup.

 Weekly supervision should follow the following tips which are mentioned below

  • Check the clearance between the mixing blade and the floor of the mixer. Adjust the clearance to approximately 3 mm, if necessary, by adjusting the height of the mixer blade.
  • Check the clearance between the wall scraper blade and the wall tiles. Adjust the wall tiles on the perimeter to be clean.
  • After adjustment, rotate the mixer by hand to check the clearance on all floor and wall tiles before starting the machine. Always check bolt tightness after making any adjustments.
  • Grease all nipples on top of the fixed gearbox. Use a single dose of Texaco MultiFac MP2 Grease, UNI XM Grade, or equivalent. Do not apply too much oil.
  • Check the hydraulic oil level in the power pack tank using a vision glass. This should not require topping up unless there is a leak in the system.
  • Check drive belt tension and high-pressure washer condition. Adjust if necessary.
  • Check for cracks or damage to wall and floor tiles. Casting blowholes can be ignored. When the tile thickness reaches approximately 5 mm, replace the entire set of wall or floor tiles as needed.
  • Use a wire brush to remove high-pressure washer spray heads and cement/concrete buildup that may be blocking the nozzle.

Monthly supervision should follow the following tips

  • Check the condition of the discharge door seal and replace if leaking.
  • Check oil level in gearbox. Use the dipstick on the fixed gearbox and the overflow plug on the rotating gearbox. Do not overfill any box. The oil level in the fixed box should be up to the dipstick base.
  • While the oil may seem emulsifying, it is not water contaminated and is a normal appearance for this oil. Oil in the gearbox should not be used and if a drop in level is noted it indicates a leak and should be checked.
  • Check the oil level on the high-pressure water pump. Top up as needed to see gauge marker.

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May 19, 2022 06:59

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