Warm days, cold nights.. keep your demolition hammer upright.

Warm days, cold nights.. keep your demolition hammer upright.

The cause of your demolition hammer leaking oil is not difficult to find and can be prevented with little effort. Oxidation through condensation and an over pressured seal in the casting of your hammer causes these leaks. Read in this blog how to prevent this and lengthen your demolition hammers lifecycle.

The demolition hammer is not used every day by most people and is usually stored outside where it’s not in the way. Most of us put it on a pallet horizontally and this causes the demolition hammer to leak after a certain period.

The cause of the leak

Especially in the months when the nights are cold and days still comfortably warm the cause though which many chisel-keepers and pistons start to oxidize arises, condensation. Mist enters the casting and water drops squeeze itself between the chisel-keeper and chisel. Because the demolition hammer is not operational the condensation within the demolition hammer causes the chisel-keepers, chisel and casting to oxidize. When the demolition hammer is used again the oxidized layer damages the rings, seals or even the pistons.

Storing your demolition hammer flat on the ground is not a good idea because the piston pushes in the seals because of its weight. This causes the seals to become oval and therefore not properly seal off the hydraulic part. Because of this the demolition hammer does not only leak oil but it also has reduced power and longer cycle times.


sloophamer hydraulisch


Store your demolition hammer vertically

If you are not using your demolition hammer longer than two weeks, read the manufacturers recommendations in the user manual.

  • Remove the chisel from the demolition hammer
  • Relieve gas from the accumulator
  • The piston that transmits the strikes on the chisel should be put in the highest position.
  • The bottom part of the piston, the chisel and the keepers need to be greased
  • The hammer has to be stored vertically in a dry place.

Usually these actions are not taken because it all has to be reverted before the demolition hammer can be used again, things can become lost etc.

Therefore, use a standard

If you store your demolition hammer inside vertically and make sure the chisel is pushing the pistons in the highest position, you’ll eliminate almost all chance on oxidization or sagging of the seals. Because the seals and keepers are in the right position in terms of a pushed-in piston, water can’t infiltrate. Storing it upright causes the water drops to slide off the bottom chisel-keeper instead of infiltrating it. If your demolition hammer is also stored in a dry place, the chance of oxidization is close to 0%.

How to make a standard?

sloophamer standaard hydraulisch

Very simple, the chisel of the demolition hammer is placed in a cylinder just a little broader than the chisel diameter. The shortest length of the chisel on determines the height of the cylinder. The chisel is shortest when, after a period of intensive use, is worn out and is in the highest position within the casting of the hammer. This causes the chisel to carry the weight of the demolition hammer and pushes the piston in the highest position. At least, if the tubes and connections are coupled when its stored. If not, the hydraulic oil can’t disappear and causes pressure on the piston which therefore can’t seal off properly. Reinforce the cylinder with a base plate and make sure the supporting base is large enough to keep the hammer vertical.

If you take these tips into account when storing your demolition hammer, it definitely lasts longer!

VemaTec sells approx. 200 ‘Rhino’ demolition hammers that are manufactured by Everdigm annually for machines ranging from 800kg to 200 ton.

Do you have questions of interest to this blog? Please contact us!




      Danny Knippenberg

     Salesman Undercarriage components & equipment

District: Belgium North 

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