Replacing the piston diaphragms of the spray liquid pumps

WORKSHOP WORK

  • As required

WARNING
Health hazard due to accidental contact with crop protection products
Clean the spray liquid circuit of the machine with flushing water.
  1. Remove the bolt 4. Remove the piston diaphragm 3 together with the retaining washer from the piston 1.

  2. If the piston diaphragm is broken:

    Drain the oil/spray liquid mixture out of the pump housing.
  3. Take the cylinder 2 out of the pump housing.
  4. Flush the pump housing thoroughly with diesel oil or paraffin.
  5. Clean all sealing surfaces.
  6. Insert the cylinder back into the pump housing. In doing so, pay attention to the correct position of the recesses and holes on the cylinder.
  7. Install the piston diaphragm with the retaining washer on the piston such that the rim points to the cylinder head side.
  8. Replace all piston diaphragms even if only one piston diaphragm is damaged.