Kit, Unloader 187879GS

1. Remove the plastic cap. This is easier said then done. Mine could not be turned so I had to drill and cut it out. The kit includes a replacement plug.
2. Remove the old valve spring and two brass valve parts. I was able to push them out by using a long bolt inserted through the outlet to the wand.
3.The valve chamber is ... Read more likely fouled with mineral deposits. I put a cork in the outlet to the wand and filled the chamber with mineral remover overnight. I them checked to be sure the chamber was clean.
4. Insert the kit components.
5. Install the new plastic plug. This was difficult because you must use pressure to overcome the spring\'s resistance while insuring that the plastic plug is not cross threaded. I jury rigged a lever to apply straight pressure while I turned the plug..

It was easy but had some trouble with the spring to compress it down and screw the head nut at the same time.

Removed retaining fitting (plastic) had to drill fitting out as the plastic hex stripped.
Removed internal valves and spring
Installed new parts
Started up and had great pressure

Old valve was scored and didn\'t seat bypassing water
Five minute job took much longer due to stripped cheap plastic fitting

I removed the nut holding the pump unloader with the spring, piston, and piston cylinder. I coated the new parts with a silicon lubricant and replaced them in the same order as I took them out. It took a little effort to reinstall the nut against the spring pressure. The pressure washer started right up and it was as good as new.