Pressure washer pump rmw 2.2g24 will build pressure but will only hold for 10-30 seconds, pressure will go down then build back up. All the seals looked good

Does the pump turn freely when it is not connected

Not sure what type pump you have but you can buy a chem. injector rebuild kit at Pressure washer parts catalog quick links Pressure Washers High Pressure...
If you need to replace the spring then replace the entire kit. Ball, spring and oring. Most pumps that come on the newer TRoy bilts are AR RMW pumps. the parts diagram can be found here at http://www.arnorthamerica.com/manuals/rmw-om%201006.pdf
The parts for a AR chem. injector are
480480 O-Ring
1250280 Ball
1560520 Spring
Good luck

Cover soap inlet and retry. Mine will not pressurize without soap or without inlet covered.

do you mean it keeps trying to build pressure even when you release the trigger on your wand???that is a problem with your unloader....also checkout your shutter valve and replace the oring on it. You will need the diagram here to know what parts Im talking about Pump Breakdowns and you can order parts here Pressure washer parts catalog quick links Pressure Washers High Pressure...

look at the schematic here Pump Breakdowns more specifically here http://www.arnorthamerica.com/manuals/rmw-om%201006.pdf Now look on page 13...part number 17 is the hose nipple ...now locate that on your pump ..that is were your chemical hose attaches and your draw chemical into.. good luck

4.5 ounces
Changing the oil in the pumps is not required but if you need to then Ar makes its own oil for the RMW pumps. #64545

remove head if possible

Rebuilding the pump is not easy. Did you use the right seal drivers? Lube the seals when you installed them? Use a torque wrench? But a valve in backwards?

This is usually a problem with the "dump valve" defective in not being able to hold the pressure but only able to release it prematurely as it should only do so when to much pressur is built up inline. Only recommend qualified pump tech. But check pump oil level and add 10w 30 pump oil if needed and retry. Also see my TIPS AND TRICKS ON PAGE
Thanks and please rate a fix ya!! jj505

Try and back flush the washer..Take spay nozzle off washer and back flush with hose...If any kind of sand or deposits get into the Pump it will hold pressure valve open not letting it build pressure.after back flushing hook back up washer and before you put spar nozzle back on or start washer turn water on and make sure all air is out of washer..hook spray nozzle back up and hold it open with washer still off.when you see that there is no more air coming out of washer start it and you should have pressure.Hope this helps you and have a great day!!

I’m happy to assist further over the phone at https://www.6ya.com/expert/joe_a3369546f8067589