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I have a problem with low pressure on my 310 with full mains pressure this started today

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Hi and welcome to FixYa, I am Kelly
Low pressure can be caused by several things. If you have 2 wands or a soap / liguid agent wand (if so equipped ) make sure that your using the high pressure wand and not the liquid agent application wand. Per the original packaging there were 3 different wand attachments. Items 3, 8 and 18 of this link (Detail F):
http://www.ereplacementparts.com/karcher-310-19947000-pressure-washer-parts-c-33388_33389_33441.html Just make sure you do not have item 3 attached until you sort out the pressure problem.

Next see this link (DETAIL C) item C-12 (Strainer NOTE there are 2 of them!) http://www.ereplacementparts.com/karcher-310-19947000-pressure-washer-parts-c-33388_33389_33441.html
Close up of strainers:
http://www.ereplacementparts.com/images/part_6414-2520.gif

Make sure the strainer(s) are clean. Remove item 10 and clean it carefully making sure the o-rings are good. Lubricate it with #150 White grease (
Last... reverse flow your nozzles by placing a rag over a hose bibb / water faucet and flush out any corrosion or debris that may have accumulated in the nozzle jet. (With 3 attachments for the wand.. the chances of all 3 being plugged up at the same time are quite rare!)

This should restore your high pressure.
Thanks for choosing FixYa,
Kelly

Posted on Apr 07, 2011

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