Thanks popeye! Pressure at the test port is right at 3k when the pump is straining during tilt forward or back attempts.

Regarding codes, when I posted that I saw the 'tilt enable/disable' options, it was seen in my service manual, not on the Access panel, so sorry for the lack of clarity... HOWEVER, I have now able to get the PIN and finally the check the settings. (I agree btw that it is a very good thing that these menus be difficult to access by anyone trying to modify performance i.e. safety, such as an employee!). But even with the access, I've still been unable to change any settings under level 2 or level 3... they are indicated as either "0" for those that are OFF or "1" for those that are ON, and I can't toggle them with the keypad. I made sure to be in the seat for the process and have tried some combination of pedals, travel switch,etc but no luck... Anyway, the settings may not need to be changed but I'm not 100% certain so will share them here.

currently:
A.1.1 Lift=DISABLE...this seems weird, since it works
A1.2 Traction=DISABLE...also weird, since it drives

A2.1.1 RAS=OFF (switch open, raise not selected)...raise works fine
A2.1.2 TLT=OFF (switch open, tilt selected)
A2.1.3 TBS=OFF (switch closed, tilt back not selected)
A2.1.4 TLMS=ON (switch closed, less than 2 deg. mast tilt)

A2.1.9 HGST1=ON (switch closed, mast below free lift)

FWIW:
The event chron history shows:
E1.1 Last Code=331
(all E1.2 to E1.15 all indicate 331)

The event accum history shows:
Event X= 1 occurrence of Event 111
Event Y= 1 occurence of Event 303
Event Z= 255 occurences of Event 331

The manual for FC-4500 doesn't reference any Event 331.
The Forklift works fine other than the tilt stuck problem.

Thanks for your time.
-M