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K 7.85M Karcher repair

Chemical feed does not work

Posted by Anonymous on

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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

  • 32 Answers

SOURCE: i require a karcher hds745 pressure washer as i

hi, this can be a problem with the hds745 machine, there are a few different versions on the market.
you first need to put a piece of pipe direct to the pump and bypass the chem valve and filter.
if still no look then you will need to have a look at the brass soap hose tail and see if it has a ball bearing in and if its stuck.
some model have a valve in the head when you have taken the brass soap hose tail out.

Posted on Jul 04, 2009

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It is not clear what type of lance or nozzel you have. You said that the machine works fine with the circulating water jet(the turbo). So it seems the machine is fine. I do sometimes service variable nozzels and variable lances. But the best solution is to replace nozzels and variable nozzles and lances with new ones. Regarding the fan spray setting it could have no pressure because it might be in the chemical setting. The chemical setting lets out a fan shape flow of water, but with less pressure. The chemical system only works on low pressure in domestic washers, that is why it needs a low pressure flat spray. The pencil jet has 2 jets comming out because if it is a lance or nozzel with ball bearings, these ball bearings must have stuck in a wrong position. Also 2 jets can come out, due to a damaged nozzel hole.
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1 Answer

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hi, this can be a problem with the hds745 machine, there are a few different versions on the market.
you first need to put a piece of pipe direct to the pump and bypass the chem valve and filter.
if still no look then you will need to have a look at the brass soap hose tail and see if it has a ball bearing in and if its stuck.
some model have a valve in the head when you have taken the brass soap hose tail out.

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