the pressure should be around 2700 on that unit and it is adjustable. the loss of pressure you have experienced is not an indication of total failure and can probably be compensated for with pressure releif adjustment. however if you acheive the correct pressure and still find the lifting speed very slow and or the steering is hard the pump may be going bad. we have found that many of these pump failures are related to drive shaft issues. if the shaft slide is locked up the pump shaft is pushed or pulled with engine movement causing wear to the end plates. there is a lubrication point on the shaft that is routinely overlooked. i can send you the adj' procedures. good luck.