Need help with Power washer - Pulsing/hunting

Mark e90 · 11-14-2016, 11:59 AM

Im looking for some help with my pressure washer it has recently started pulsing loosing pressure for a split second at the lance and making a sharp grinding sound from the machine.

Its an old machine my dad has had for years and i have had a good look around but can't find any name of make or model

Since this problem has started i had also been getting issues with my snow foam gun, its getting clogged up with grit coming through the washer so I'm thinking that there is some kind of filter thats needing cleaned or replaced on the washer that may also be causing the pulsing issue ?

I was ready to start stripping the thing down but thought it was probably best to post up and try and get some advice as i really don't have a clue when it comes to pressure washers !

Here is a link to a quick video i made up just to show exactly whats happening with it

Any advice is much appreciated thanks

Naz24 · 11-16-2016, 08:21 AM

What it looks like its not enough water pressure to the hose....

I assume your feed is fine, i concur with some kind of filter, etc. Not sure because of make/model missing

Aatish · 11-16-2016, 08:25 AM

Not enough water pressure to washer inlet.

Some washers have a mesh filter at the inlet, see if that's clogged up or not. Also, make sure your supply is fully open.

Mark e90 · 11-17-2016, 05:34 AM

The machine is a Wesley Nova 2

I had a good look at it today and not having much luck.

The inlet on my washer just connects the hose to a reservoir and then a hose from that goes to the pump, I unbolted the hose going into the pump but know sign of any filter. I tried letting it run for a while to see if it would clear, after letting it run for a while it seemed to be getting better and stopped pulsing completely for a good few minuets but then just started again randomly.

I can see on the pressure dial when the machine is running the pressure gradually drops when it drops down so far thats when it makes the cranking noise and pulses at the lance

I called a parts supplier who immediately said the pumps toast once i told him the symptom but I'm not so sure

11-14-2016, 11:59 AM	#1
Mark e90 Captain 110 Rep 716 Posts Drives: BMW e90 Join Date: Aug 2011 Location: Scotland iTrader: (0)	Need help with Power washer - Pulsing/hunting - link to video in post Im looking for some help with my pressure washer it has recently started pulsing loosing pressure for a split second at the lance and making a sharp grinding sound from the machine. Its an old machine my dad has had for years and i have had a good look around but can't find any name of make or model Since this problem has started i had also been getting issues with my snow foam gun, its getting clogged up with grit coming through the washer so I'm thinking that there is some kind of filter thats needing cleaned or replaced on the washer that may also be causing the pulsing issue ? I was ready to start stripping the thing down but thought it was probably best to post up and try and get some advice as i really don't have a clue when it comes to pressure washers ! Here is a link to a quick video i made up just to show exactly whats happening with it Any advice is much appreciated thanks __________________ BMW 325i M sport - Custom stainless exhaust ( 335i set up ) - Piano black interior trim - Gloss black kidney grills - Ferric grey 18" MV3 alloys -
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11-16-2016, 08:21 AM	#2
Naz24 Lieutenant Colonel 1628 Rep 1,727 Posts Drives: W205 AMG C63 / E70 X5M Join Date: Mar 2014 Location: North/Central NJ iTrader: (1)	What it looks like its not enough water pressure to the hose.... I assume your feed is fine, i concur with some kind of filter, etc. Not sure because of make/model missing __________________ 2017 C63 2012 X5M SOLD: 2015 M3; 2007 X3 M Sport; 2014 X3 M Sport 35i; 2004 X5 4.4i; 1994 325i
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11-16-2016, 08:25 AM	#3
Aatish Lofty 3458 Rep 849 Posts Drives: i4 M50, 991.2 C2, RRS Diesel Join Date: Dec 2013 Location: ORD <> ATX iTrader: (0)	Not enough water pressure to washer inlet. Some washers have a mesh filter at the inlet, see if that's clogged up or not. Also, make sure your supply is fully open.
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11-17-2016, 05:34 AM	#4
Mark e90 Captain 110 Rep 716 Posts Drives: BMW e90 Join Date: Aug 2011 Location: Scotland iTrader: (0)	The machine is a Wesley Nova 2 I had a good look at it today and not having much luck. The inlet on my washer just connects the hose to a reservoir and then a hose from that goes to the pump, I unbolted the hose going into the pump but know sign of any filter. I tried letting it run for a while to see if it would clear, after letting it run for a while it seemed to be getting better and stopped pulsing completely for a good few minuets but then just started again randomly. I can see on the pressure dial when the machine is running the pressure gradually drops when it drops down so far thats when it makes the cranking noise and pulses at the lance I called a parts supplier who immediately said the pumps toast once i told him the symptom but I'm not so sure __________________ BMW 325i M sport - Custom stainless exhaust ( 335i set up ) - Piano black interior trim - Gloss black kidney grills - Ferric grey 18" MV3 alloys -
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