Our goal is to give our customers the best support ever. This is a list of the most frequently asked questions.
If you do not find an answer to your questions, or if you need direct support, please contact our staff by phone or by email.

CONTROLLED DEMOLITION

Frequently Asked Questions

THE CYLINDER HAS OIL LEAK

Promptly replace the seal kit as follows:

  1. Release the attachment cylinder making sure that the oil dynamic system is switched off and free from pressure.
  2. Completely empty the hydraulic cylinder from the oil and lock it on the bench in a suitable way.
  3. Extract the steam with your hand until it has travelled almost the whole stroke (if necessary use a puff of compressed air to help).
  4. Loosen the steam-guiding head by using the compass wrench, insert in the holes located in the front.
  5. After completely loosening it, let the head slide forwards manually so that you can see the piston front part.
  6. Then extract the steam by gripping (or supporting it with lifting equipment) the front attachment and pulling it towards the outside by using an oscillating movement, from up to down.
  7. Free the cylinder liner and lock the steam in the vice using soft jaws.
  8. Loosen the piston tightening metal ring, then extract the piston and the head from the steam.
  9. Check visually the smoothed and chrome-plated surfaces of the liner and steam and check (if you have a parallel lathe) the straightness of both.
  10. Remove the seals from their places.
  11. Clean carefully all the components and replace the whole kit of seals, greasing it with hydraulic oil.
  12. Check the cylinder connection and if necessary replace the bushings represent the mechanical fulcrum and anchoring parts of the machine.
  13. Reassemble the cylinder carrying out the same operations as for disassembly in the reversed order.
  14. Before reconnecting the cylinder to the attachment, check that it works correctly, if it is possible by using an electro-hydraulic control unit at a pressure of no less than 200bar. It is recommended to print the service date.

OBSERVED SLACK OR DANGLING OF THE JAW

In this case, it is necessary to intervene promptly by replacing the spacers between the pulveriser body and the moving parts.

OBSERVED SLACK OF THE BASE BEARINGS

  1. It is necessary to inspect the tensioning force of the bolts (tightening force Nm 387) using the cross technique.
  2. If the slack is caused by wear on the base bearing rolling tracks and is greater than four (4) times the initial slack, do not hesitate to contact our technical service to replace the bearing itself.

THE CRUSHER DOES NOT TURN OR TURNS SLOWLY

  1. Check the tightening force of the pins 4.97 kgn of the coupling pins of the gear- motor to the rotation box.
  2. Check the pressure parameters and the flux parameters.
  3. Check the oil level in the gear-motor (recommended oil SAE 80W/120). Visually check that there are no leaks.

THE HYDRAULIC CYLINDER IS SLOW

Ensure that the pressure and the flow parameters reflect those recommended by the manufacturer by calibrating the maximum pressure valve.

HYDRAULIC BREAKERS 

Frequently Asked Questions

HYDRAULIC HAMMER DOES NOT START

Cause: clamped tool. Solution: remove and replace the tool.
Cause: fault in the rubber hoses with quick couplings (not get oil). Solution: check the hoses, repair or replace the grafts.
Cause: fault in the control valves hydraulic excavator. Solution: check that the pressure relief system hammer occurs after the 200 bar.
Cause: insufficient hydraulic oil in the tank, in the excavator. Solution: restore the oil level.
Cause: faulty breaker. Solution: remove the breaker and control.

LOW POWER BEAT

Cause: low nitrogen pressure in the head “exhaust”. Solution: check and restore the pressure in the head.
Cause: nitrogen accumulator high pressure “exhaust”. Solution: check diaphragm accumulator.
Cause: insufficient hydraulic oil flow. Solution: restore the proper flow of oil, check the pressure.
Cause: high oil temperature in the tank. Solution: check the level the oil level in the tank and the cooling circuit.
Cause: low oil pressure. Solution: check that the setting of the pressure relief valve of dem is at least 200 bar.

LOW SPEED WITH A LOT OF ENERGY FOR STROKE

Cause: tool stuck in the lower head. Solution: try to remove the tool.
Cause: demolition partially blocked. Solution: hammer or other dynamic element in the injured.

OIL LEAK FROM THE TOOL

Cause: cylinder seals worn. Solution: remove and replace all the seals.

OIL LEAK BETWEEN HEAD AND CYLINDER

Cause: bolts not tightened or broken. Solution: tighten the bolts or replace.

TOO HIGH TEMPERATURE

Cause: get more oil than expected. Solution: restore parameters.
Cause: air temperature too high. Solution: install one additional heat exchanger.
Cause: low oil level in the tank excavator. Solution: restore the oil level in the tank.