The only way to identify and troubleshoot problem components in a heavy-duty power steering system is with a flow and pressure reading meter like OTC's HD Power Steering Pump Analyzer
This tester measures 1 to 10 gallons of oil flow and up to 3000 psi of pressure
When connected in-line this universal analyzer will isolate the failed components in just minutes - no more wasting time using trial and error methods to diagnose issues
For use on Eaton/Vickers, TRW, Ross, and Shepard power steering systems
Set comes complete with high pressure hoses, 9/16-18 standard fittings, and quick disconnect couplers