Karcher hd3600dh pressure washer unloader valve

[MadJack]

I've been all over the web looking for #1- a parts manual, and #2- the correct part. At one point I found a new-old stock complete pump but my web service went down before I could order it.
Any help would be greatly appreciated.

 

[Richard001]

Here is a copy of the user manual:

 

[Richard001]

Here is a copy of the parts manual:

 

[MadJack]

Thank you Richard!