Riva 90 ARGO - Page 428

14 - TROUBLESHOOTING 422
14.13 HYDRO-ELECTRIC STEERING SYSTEM
For further information, please contact the RIVA Service Department.
Problem Cause Corrective action
1. Air bubbles or foam in the system • The oil level in the tank is too low and does
not allow the suction pipe to be completely
plunged. In this way the pump sucks oil and air
at the same time
• Possible openings and little holes on the suc-
tion pipes or faulty pump seals, which allow air
to penetrate
• Check
• Check
2. The pump does not deliver oil • Wrong rotation direction
• Obstructed ducts or suction strainers
• Oil level in the tank too low
• Air leakages in the suction system
• Oil too viscous with some difculties in passing
through
• The shaft or other components of the pump are
broken
• Check
• Check
• Check
• Check
• Check
• Replace
3. Lack of pressure in the system • The pump does not deliver oil
• Relief valve is not calibrated
• Free discharge of oil to the tank somewhere in
the system
• Check
• Check
• Check