What to do if hydraulic oil in Toro Groundsmaster 4000-D reservoir foams?
- RRalph RushSep 12, 2025
If the hydraulic oil in the reservoir is foaming, it could be due to a few reasons. First, check the hydraulic reservoir oil level and refill if it's low. Ensure that you are using the correct hydraulic oil for the system. Another possible cause is air leaking into the suction line, so repair any air leaks you find there.












