TROUBLE SHOOTING 2.3 System Diagnosing Steps And Special Tools 1 Check oil level in reservoir: a .fill to proper level as marked on site tube. 2 Inspect external control linkage for: a. misadjustment or disconnection b. binding, bending or breakage c. misadjusted, damaged or broken hydroback 3 Inspect servo control valve for: ( if used ) a. proper inlet pressure b. misadjusted or damaged neutral return spring c. galled or stuck control spool d. galled or stuck servo piston 4 Inspect heat exchanger for: a. obstructed air flow b. improper plumbing ( inlet to outlet ) c. obstructed fluid flow 5 Inspect inlet filter or screen for: a. plugged or clogged screen or filter b.
obstructed inlet or outlet c. open inlet to charge pump ( open line ) 6 Check charge pressure: a. follow test procedures section 2.5 7 Inspect charge relief valve for: a. poppet held of seat b. damaged or broken spring c. damaged valve seat d. improper charge relief setting 8 Inspect charge pump for: a. broken or missing drive coupling b. damaged or missing o-rings c. galled or broken geroter set 9 Inspect system relief valves for: a. damaged or broken springs b. valve held of seat c. damaged valve seat d. improper pressure relief settings 10 Check system pressure: a. follow test procedures section 2.5 11 Inspect hydraulic motor for: a.
disconnected coupling 0 - 500PSI (34.5Bar) 0 - 5000PSI (345Bar) 2 Pressure gauges C1699 Vacuum gauge 30in. Hg C1704 C1698 Adapter fittings Caps and plugs Photographs in the right hand column show some of the special tools that may be required to diagnose and repair the hydrostatic system. C1697 2-8