Question about Hilti 378375 TE-YX 5/8" - 13" Concrete Drill Bit

1 Answer

Trying to drill a solid concrete 10 inch wall

I have rotation but hammering is weak on my Hilti te52 drill.

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  • iwae405 May 11, 2010

    this happens since you first bought this?

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  • 61 Answers

The ideal sollution is to fully service the machine but there may be a quick fix.
remove the 4 screws that hold the black plastic handle assembly, and take the handle off. on the top of the drill you will see an oil filler cap. unscrew using a 10mm allan key.
empty out any old oil. rinse out with some parafin if you like. empty out again . put some new oil in and replace the cap. 50cc of transmission fluid / power steering oil will do the trick. if this dousnt fix it then you will need to replace the o-rings on the pistons, if this is the case, drop me a email and I will send you a parts diagram. paul@wysehire,gi
good luck.

Posted on Sep 19, 2009

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6ya6ya
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Posted on Jan 02, 2017

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