Clean It Up

UK General Cleaning Forum => General Cleaning Forum => Topic started by: APWS on November 28, 2014, 05:10:32 pm

Title: machine jerking
Post by: APWS on November 28, 2014, 05:10:32 pm: hi guys,
what makes a machine jerk when pulling the trigger? when I release the gun it runs smooth but as soon as I pull the trigger it starts jerking like a pulse, it's a gx390 with 19.2 litre pump, is air getting in somewhere ? I recently changed the unloader valve to a k5 and adapted the pump to a suck & return system,
thanks. ::)roll
Title: Re: machine jerking
Post by: Don Kee on November 28, 2014, 07:13:27 pm: Quote from: APWS on November 28, 2014, 05:10:32 pm
hi guys,
what makes a machine jerk when pulling the trigger? when I release the gun it runs smooth but as soon as I pull the trigger it starts jerking like a pulse

I think someone needs 'the talk'...
Title: Re: machine jerking
Post by: Roger Oakley on November 28, 2014, 08:51:39 pm: Re-check all you have done with the replacements, as it does seem from what you are saying it is drawing in air from somewhere.
Title: Re: machine jerking
Post by: chris scott on November 28, 2014, 08:58:35 pm: Quote from: Roger Oakley on November 28, 2014, 08:51:39 pm
Re-check all you have done with the replacements, as it does seem from what you are saying it is drawing in air from somewhere.

Or a partially blocked nozzle.
Title: Re: machine jerking
Post by: cleaning4usussex on November 28, 2014, 09:59:53 pm: Mine done that for a while it's also started stalling when I let go of the trigger I've had nothing but problems with mine and it was brand new! I've done probably 20-30 jobs with it and it's messed about every time doing something strange problem is every time goes wrong it's half a day wasted driving to london
Title: Re: machine jerking
Post by: BDCS on November 28, 2014, 10:29:19 pm: Mine done that for a while it's also started stalling when I let go of the trigger I've had nothing but problems with mine and it was brand new! I've done probably 20-30 jobs with it and it's messed about every time doing something strange problem is every time goes wrong it's half a day wasted driving to london ???

Why does taking a pressure washer for a drive to London help ? I'd mess you about if you kept making me go to London ::)roll
Title: Re: machine jerking
Post by: Kenny83 on November 29, 2014, 08:53:12 pm: 2 small a nozzle? Wrong k unloader? (needs to be a k5.3 for 19 lpm, not 5.2 or 5.1 etc) blocked valves? is it a jerk or shudder?
Title: Re: machine jerking
Post by: BDCS on November 30, 2014, 11:09:28 am: 5.2 is 16 - 25 ltrs
Title: Re: machine jerking
Post by: APWS on November 30, 2014, 12:06:36 pm: Quote from: Kenny83 on November 29, 2014, 08:53:12 pm
2 small a nozzle? Wrong k unloader? (needs to be a k5.3 for 19 lpm, not 5.2 or 5.1 etc) blocked valves? is it a jerk or shudder?

it's a jerk Kenny, and bdcs is right k2 is 16 - 25 ltr, i'v put new valves in the pump, will check all my conection & nozzles,
thanks.
Title: Re: machine jerking
Post by: chris scott on November 30, 2014, 05:26:35 pm: Fit a new unloader