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UK General Cleaning Forum => General Cleaning Forum => Topic started by: drive surgeon on December 29, 2009, 01:56:52 pm

Title: if your pressure surges is this the unloader valve going?
Post by: drive surgeon on December 29, 2009, 01:56:52 pm: when my machine is on and gun pressed i can feel the pressure surging. it goes to full pressure and then eases and then back to full pressure. as i have had the unloader for ages do you think it may need changing?
Title: Re: if your pressure surges is this the unloader valve going?
Post by: trevor perry on December 29, 2009, 02:32:35 pm: Quote from: drive surgeon on December 29, 2009, 01:56:52 pm
when my machine is on and gun pressed i can feel the pressure surging. it goes to full pressure and then eases and then back to full pressure. as i have had the unloader for ages do you think it may need changing?
it could be your unloader it might be just sucking in air somewhere in the system.
Title: Re: if your pressure surges is this the unloader valve going?
Post by: Roger Oakley on December 29, 2009, 04:36:19 pm: DS
Might be worth getting a decent service on your machine over the winter months, this should stop you having these niggling problems.
Title: Re: if your pressure surges is this the unloader valve going?
Post by: BDCS on December 29, 2009, 05:31:21 pm: So soon after purchase ???
Title: Re: if your pressure surges is this the unloader valve going?
Post by: drive surgeon on January 02, 2010, 06:10:05 pm: yeah ;D
its been a gud un!
Title: Re: if your pressure surges is this the unloader valve going?
Post by: drive surgeon on January 14, 2010, 03:12:29 pm: my unloader valve which has a built in 'by pass' valve (back to tank) is twisted to full but when i pull trigger on lance there is water still coming out of by pass valve. im thinking the unloader is gone as my pressure has been lost when in full bore. im sure the by pass stopped water coming out totally when in full bore and unloader twisted to full power.

any ideas guys?
Title: Re: if your pressure surges is this the unloader valve going?
Post by: BDCS on January 14, 2010, 04:04:24 pm: DS as Roger has said you need to get someone competant to service your kit, with the trigger open you should have no flow at all from the by pass line. I change the unloader every year as I put so many hours on it during the season, I also keep a new spare. I change the valves every year as well. Why don't you ask someone on here thats close who could service your kit ? Even take it back to Techclean
Title: Re: if your pressure surges is this the unloader valve going?
Post by: drive surgeon on January 14, 2010, 04:18:32 pm: thanks bdcs. im still only learning as i dont do the maintenance myself but i would like to know how.

im going to buy a new unloader. it must be needing replacing. i bet if i order one i could fit it myself?

surely you just unscrew old one and fit new one.
Title: Re: if your pressure surges is this the unloader valve going?
Post by: BDCS on January 14, 2010, 05:48:39 pm: Ring tech clean and tell Jan you need a new unloader - you can buy one bare or dressed ie with everything fitted ready to fit. You will only need a pair of adjustables. If you can fit a new broom head then you will be able to fit an unloader. If I were you I'd buy one dressed and one bare, fit the dressed one and transfer all the fittings onto the bare one from your old one
Title: Re: if your pressure surges is this the unloader valve going?
Post by: stevef78 on January 14, 2010, 07:45:21 pm: just before xmas we were havin the same problem with water still coming out of the (return to barrell) part,it was the uploader,but also jan@techclean recommended changing the valves aswell

uploader 30quid and valves i think were about 19quid,...also easy enough to change,if our close to e port ile do it for you..
Title: Re: if your pressure surges is this the unloader valve going?
Post by: richywilts on January 15, 2010, 01:07:56 am: i fort mitch had to drill a new hole thru that thing ste for us coz it was blocked??
Title: Re: if your pressure surges is this the unloader valve going?
Post by: drive surgeon on January 15, 2010, 11:17:35 am: how easy is it to change the valves? what do you do?