Karcher k4 high pressure hose connection woes

Discussion in 'Tools and Materials' started by foxhole, 9 Jan 2020.

  1. foxhole

    foxhole

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    In-laws dropped off his pressure washer which keeps blowing the high pressure lance connection where it leaves the main body .
    Held by a C clip which does not hold in use , tried new clips but same problem .? Only had 5-6 uses so unlikely to be worn .
     
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  3. Burnerman

    Burnerman

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    Either the hose isn’t fully pushed into its socket (easily done, needs a firm click) or the plastic bracket that helps to hold the clip has a piece broken off, I imagine.
    Never did like these quick release fittings!
    John :)
     
  4. foxhole

    foxhole

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    No quick release system involved, lance hose pushes in easily,[brass] no click involved as C clip slides in to lock joint[Initial connection seems very secure, cannot pull out by hand].Bracket undamaged, holds briefly but turning lance off and on is enough to break connection.
     
  5. Burnerman

    Burnerman

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    The type Ive come across are using an ‘R’ clip (or more accurately a double R) so for the hose to disconnect the water pressure must be forcing the legs of the R clip apart.....almost impossible if the holding bracket is unbroken.
    So - if memory serves- the R clip pushes through two holes, slides through the groove on the hose, and then locates in another two holes behind?
    Something worn or cracked there, I’d guess.
    John :)
     
  6. foxhole

    foxhole

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    Last edited: 9 Jan 2020
  7. Burnerman

    Burnerman

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    Need a pic of that one.....can’t say I’m familiar with that design. Thought it was a brass stem with an O ring that pushed into the hose reel drum somewhere.
    Mind you there are hundreds of Karchers, and no two are alike.
    John :)
     
  8. foxhole

    foxhole

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    No hose reel , pushes into the high pressure outlet .
     
    Last edited: 9 Jan 2020
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  10. Burnerman

    Burnerman

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    Yep, that’s really a double R clip - of a fashion!
    If its disconnecting, either the open end is springing open too much or the slide is allowing the clip to spread - much the same really.
    Any realistic chance of tying the open legs tighter with some thin, tough wire or whatever?
    John :)
     
  11. foxhole

    foxhole

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    Think it’s sorted , run water thru machine with power and Lance off, ad Lance and run more water then turn on power and all good , air locked.
     
    Last edited: 9 Jan 2020
  12. Burnerman

    Burnerman

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    That is the correct technique when dealing with the cheaper models - allow water to bleed through before switching on. I guess that prevents a high pressure air shock otherwise.
    Clearly not the best design!
    John :)
     
  13. foxhole

    foxhole

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    Well clip failed again, metal is too feeble so wrapped a length of copper wire I stripped off cable around the open end of the clip and held so far.Awfull design and from searches I made has been a problem for over 10 years .
     
  14. Burnerman

    Burnerman

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    I do recall having seen this one before, but it was a very cheap machine (£45 I think) so I didn't go any further with it and returned it to its owner.
    Your method should be just fine, and its best to leave the lance hose connected anyway.
    John :)
     
  15. foxhole

    foxhole

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    Have pestered Karcher and they have agreed to collect and repair foc, will be interesting to see what they do.
     
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