Where is the unloading valve on the 4000 karcher

SOURCE: need help getting to an cleaning stuck unloader

The cart body makes this process a little confining but it can be carried out without removing the pump from the motor.

Diagram courtesy of:

1. Refer to assembly 9 in the diagram. Remove the splash cup by working the push-on nut off the top of the cup.
2. Remove two Torx fasteners (13) and twist the nylon valve retainer gently while pulling up to remove it. Be aware of the small parts under the retainer.
3. The objective is to get the valve (12) out of the bore (A). Connect the hose and wand to the pump, make sure the wand valve is closed. Connect the water supply to the pump and turn on the water flow.
4. Place a shop towel over the valve bore and with the throttle in the off position, pull the start cord briskly several times to see if enough pressure builds to pop the valve out of the bore. If not, set the throttle to low and start the engine. Unless the valve bore is really corroded, this should pop the valve out.
5. If this process fails, you may have to unmount the pump and employ a more brutal approach that will likely require a new valve.

SOURCE: I have a Karcher HD3500 and was told Imay have a

Hi
The unloader valveis HERE
If you go to D-2 it is part numbers 8 to 13. If it is stuck it is not only important to free it up but also make sure no o-rings are damaged and lube it with a very good waterproof grease. Good luck.

SOURCE: Unloader Valve - Karcher Pressure Washer

where is the unloader valve locaed on a Briggs Stratton pressure washer?