[david washbrook]

My Zeta washer has developed a fault, when running at full revs it pulsates but if I turn the revs down it stops.
I suspect it drawing air in from some where but carnt find where, is my thinking right or could it be something else and if it is air getting drawn in any ideas where it could be getting in

Thanks

[Kenny83]

It's could either be air or a restricton on the inlet... 'I'd guess at the latter first as you say it only does it at full flow... try pressure feeding it to check for leaks but check your filters to?

[david washbrook]

Turned out to be a knack eared unloader valve not happy about it as it's only 13 months old and done approx 25hrs

[BDCS]

I bet you have stood around for those 25 hours talking and thats whats trashed the unloader 

[Kenny83]

if interested I have a twin cylinder lombardini air colled machine with a gearbox driven interpump 2035 - 200 bar at 35lpm, it's got a large 80 meter (ish) hose reel on with about 40 meters of hose, it's a proper van mount drain jetter very similar to one I use myself, £2k
 

[BDCS]

4k @ 54 is a proper drain jetter 

[Kenny83]

4k @ 54 is a proper drain jetter 

Yes that's true, or maybe even 4k @ 79 which I was looking at the other day... beast!  too big for me though. I meant the set up is a van pack, big heavy duty thing