Before we start,  make sure to get a copy of the owner’s manual which you can download at www.sonnysdirect.com and review all the safety information related to this procedure.  


Gather the tools and supplies you’ll need which are:  

  • Safety Glasses

Once you have everything ready the first thing you need to do is: 

  1. We recommend AW32  non-detergent, non-foaming hydraulic fluid which is an oil-based product
  2. Hydraulic oil should be changed on an annual basis
  3. Water-based products can be used * water-based products run much hotter and will void most manufacturer's warranties. If water-based products will be used, a cooler should be added to the system.

The proper way to fill a tank is to override on MCC or controller, the tank is empty so the pump won’t run because low-level switch activated when draining the tank. Fill tank until low-level switch re-engages the pump, then add about an additional gallon. Much easier to clean up 1 gallon of fluid than several gallons.