Bucket truck problems

[Billyglynn]

I just installed a am650 altec bed onto another truck , I purchased the bed used and it was in working order, bought a new pump for the pto on my truck with correct psi and pump orientation, hooked everything up as specified by the altec service manual, and nothing at all happens when I try to operate the bed, I've purged the system by the purge valve as suggested in the manual , and I get nothing, is there air in the system ? I've double checked every line ,

 

[SweetMK]

The first thing I would think about is the direction of oil flow,,
either the pump is hooked backward, or the pump rotation is backward.

When you look in a gear pump, the oil flows opposite of what you would initially think.

The easiest test is to crack the line out of the pto pump,, no flow,, something is backward.

 

[Billyglynn]

I'm going to check that asap , it's a variable compensated pump , I definitely believe it's a pump issue , wonder if not could I fool the compensator to make it pump full pressure

 

[Billyglynn]

What happens if by chance the pump shop accidently got the rotation wrong on my variable displacement compensated hyd pump ? And what's the best way to check for that