Makita SDS drill

[jackg]

Makita 2450 which is ten years old but not had much use until the last two weeks. I have been using it on hammer only with a chisel to break through cement on stone walls to break down the walls and to store the stone, the walls are typically cement pointed on top of Lime mortar, so no resistance when you get through the cement.
Using today on more extensive area of cement it took longer for the hammer action to start every time I used it, watching it the chisel has to slide into the chuck slightly for the hammer action to start.
Not sure what is wrong, dust or worn hammer component or just over use.
So if anyone can suggest a likely cause and or the cost of repair or the spare parts I would be grateful.
It only gives 2.7J of energy compared with a small breaker which has 7J of energy.

 

[Deleted member 174758]

The hammer action is pneumatic. I'd suspect that the seals have perished or dome thing similar has happened.

 

[jackg]

Thanks for your comments.
I went into a hire shop to get a more powerful breaker and asked them. their opinion was that the drill has an overload cutout when it is hot.
Seems to be ok now.