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Pressure washer woes
My nearly-new Kaercher pressure washer has developed a problem... when
I use it with the 'normal' wand (as opposed to the twirly dirt-blaster thingy), the motor/pump keeps cutting in and out so that I get a pulsatile flow of about two blasts per second. (I have occasionally seen this with the twirly wand as well). What could be causing this? I wondered about a partial blockage in the wand - would that cause these symptoms? It seems to work perfectly well when the pump is in its 'on' phase, and I can't see anything amiss. The water supply by hose is fine I'm sure - it's fed from a direct mains-fed tap. Any advice ? Thanks David |
Pressure washer woes
I wondered about a partial blockage in
the wand - would that cause these symptoms? Yes, it does sound like that. If there is back pressure the pump detects it and switches off, e.g. when you release the trigger. Rob Graham |
Pressure washer woes
"David" wrote in message om... My nearly-new Kaercher pressure washer has developed a problem... when I use it with the 'normal' wand (as opposed to the twirly dirt-blaster thingy), the motor/pump keeps cutting in and out so that I get a pulsatile flow of about two blasts per second. (I have occasionally seen this with the twirly wand as well). What could be causing this? I wondered about a partial blockage in the wand - would that cause these symptoms? It seems to work perfectly well when the pump is in its 'on' phase, and I can't see anything amiss. The water supply by hose is fine I'm sure - it's fed from a direct mains-fed tap. Any advice ? Thanks David Ours does this on 2 occaisions a) when the inlet filter is blocked b) when the nozzle is blocked where it joins the gun --- Outgoing mail is certified Virus Free. AVG Free Edition Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.515 / Virus Database: 313 - Release Date: 01/09/2003 |
Pressure washer woes
"David" wrote in message om... My nearly-new Kaercher pressure washer has developed a problem... when I use it with the 'normal' wand (as opposed to the twirly dirt-blaster thingy), the motor/pump keeps cutting in and out so that I get a pulsatile flow of about two blasts per second. (I have occasionally seen this with the twirly wand as well). What could be causing this? I wondered about a partial blockage in the wand - would that cause these symptoms? It seems to work perfectly well when the pump is in its 'on' phase, and I can't see anything amiss. The water supply by hose is fine I'm sure - it's fed from a direct mains-fed tap. Usually when this happens its because you have a small bit of grit in the nozzle which is causing the pressure to rise past the relief valve setting. Best way is to remove the lance from the trigger or nozzle from lance (if possible) and clean it by applying water backwards through the nozzle. Or use some bristles from a washing up brush. Don't use wire! Tim.. --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.514 / Virus Database: 312 - Release Date: 28/08/2003 |
Pressure washer woes
"Tim.." wrote in message ...
"David" wrote in message om... My nearly-new Kaercher pressure washer has developed a problem... when I use it with the 'normal' wand (as opposed to the twirly dirt-blaster thingy), the motor/pump keeps cutting in and out so that I get a pulsatile flow of about two blasts per second. (I have occasionally seen this with the twirly wand as well). What could be causing this? I wondered about a partial blockage in the wand - would that cause these symptoms? It seems to work perfectly well when the pump is in its 'on' phase, and I can't see anything amiss. The water supply by hose is fine I'm sure - it's fed from a direct mains-fed tap. Usually when this happens its because you have a small bit of grit in the nozzle which is causing the pressure to rise past the relief valve setting. Best way is to remove the lance from the trigger or nozzle from lance (if possible) and clean it by applying water backwards through the nozzle. Or use some bristles from a washing up brush. Don't use wire! Thanks for the advice, all. Have checked the inlet filter where the garden hose attaches - perfectly clean. Had a prod with some bristles as suggested, but have also discovered I can actually look down the nozzle of the lance and see daylight right through it, and so can confirm visually there are no blockages there. So I'm a bit (a lot) puzzled. Any further ideas anyone?! Could it be faulty machine? Its a recent enough purchase to be returned to the supplier, but I don't want to do that unless it's a genuine fault. Might the fact that I occasionally experience the problem with the twirly wand be explained by differential pressures in the two wands? Thanks David |
Pressure washer woes
"Tim.." wrote in message ...
"David" wrote in message om... My nearly-new Kaercher pressure washer has developed a problem... when I use it with the 'normal' wand (as opposed to the twirly dirt-blaster thingy), the motor/pump keeps cutting in and out so that I get a pulsatile flow of about two blasts per second. (I have occasionally seen this with the twirly wand as well). What could be causing this? I wondered about a partial blockage in the wand - would that cause these symptoms? It seems to work perfectly well when the pump is in its 'on' phase, and I can't see anything amiss. The water supply by hose is fine I'm sure - it's fed from a direct mains-fed tap. Usually when this happens its because you have a small bit of grit in the nozzle which is causing the pressure to rise past the relief valve setting. Best way is to remove the lance from the trigger or nozzle from lance (if possible) and clean it by applying water backwards through the nozzle. Or use some bristles from a washing up brush. Don't use wire! PS... Further to my post of an hour ago, the pressure pulsing problem is no evident most of the time with my twirly lance as well. I feel a trip to B&Q coming on! David |
Pressure washer woes
"David" wrote in message ... "Huge" wrote in message snip This is caused by insufficient flow to the washer. Try removing any "stop ends" in the hose, or running a hose directly to the washer. Thanks Huge. Interestingly, in the meantime I've found and phoned the Kaercher Helpline, and they diagnosed the problem as me having a stop-end on my hose. Ten minutes later, I'd rectified that..... but the fault persisted. Kaercher then told me to take the machine back for an exchange - which I've just done. Sorry, I joined this late. I agree with Huge - mine does this all the time if I use it on too long a bit of hose - a more direct connection fixes it - also if the pressure is down. Never mind, sounds like you got a replacement anyway! -- Bob Mannix (anti-spam is as easy as 1-2-3 - not) |
Pressure washer woes
I have a Karcher as well. I have also been having pressure problems.
My normal routine begins with running water through the section of hose before connecting it to the Pressure washer, to clear any crud and air. Remove all kinks and try to make the hose as straight as possible. Similarly make sure the washer gun hose is also as straight as possible. This normally resolves really bad pressure problems or the switching on/off cycle. However mine has started leaking water out of the plastic vents as well now. Anybody know what this is? I suspect a gasket of some description needs replacing. |
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