2. TROUBLESHOOTING 2. TROUBLESHOOTING 侍 Diagnose malfunction charts are arranged from most probable and simplest to verify, to least likely, more difficult to verify. Remember the following steps when troubleshooting a problem : Step 1. Operational check out procedure (see group 3 in section 1) Step 2. Operational checks (in this group) Step 3. Troubleshooting Step 4. Tests and adjustments (see group 3) 5-15 Problem Cause Remedy No steering Low oil level. Failed steering pump. Failed main pump drive. Stuck priority valve spool. Broken priority valve spring. Relief valve in steering valve stuck open. Add recommended oil. Remove and inspect return filter for metal pump particles.
Do main pump flow test. Remove and inspect priority valve spool. Remove and inspect spring. Do relief cartridge leakage test in group 3. No hydraulic functions steering normal Stuck open system relief valve. Locked safety valve. Plugged pilot line filter. Failed hydraulic pump. Low secondary pressure of RCV. Replace relief valve. Unlock safety valve. Inspect and replace. Remove and inspect the pump. Check the pressure and replace if neces- sary.