S70 hydraulic whine ADVICE

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wexplorew

Member
Joined
Sep 9, 2022
Messages
6
Got a 2016 S70 (only 200 hours)......and it whines as soon as you give it some decent RPM's. No leaks I can see....hydro oil is in middle of stick, unit functions as it should. The only time it DOES NOT whine is when the lift arms go UP. Ideas?????
 

Hotrod1830

Well-known member
Joined
Sep 14, 2010
Messages
513
With such ow hours and use, I would suspect air in the system. Have you used it for any extended period of time? My 463(older version of S70) makes some weird noises if it has been parked for several months, but clears up after a couple hours of heavy use.
If you have not changed the hydro filter, do that first. Cut the old out apart and check for metal debri. small amounts are normal.
Check ALL hose connections for tightness. Loose fittings can cause an air leak and cavitation, causing noise.
 

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