I have a Cambell-Housfield electric pressure washer, which
I'm guessing is similar to yours. I had the plastic
collar break off of mine. It is for gripping the hose
fitting underneath it. I used Channel Lock pliers
to remove my fitting from the cast aluminum pump. I was
thinking it was going to snap off the cast, but it finally
came loose. When I put it back on I lubed it up with
lots of anti-sieze.

HI lBPOD...I LAUGHED WHEN I READ YOUR SUGGESTION..THEN I THOUGHT WHAT THE HECK I'LL GIVE IT A TRY...WALA IT WORKED..I FEEL KIND OF DUMB NOW ANYWAY CAN YOU TELL ME THE MODEL NUMBER OF YOUR WASHER..I THINK THE PART NAME IS GARDEN HOSE ADAPTER...THANK YOU FOR YOUR HELP...STEVE_G92