xcgreene
Platinum Member
I've been following this thread (among others) as I recently came up on my 50 hour service and had similar decisions to make.
I decided to change hydraulic fluid as well as filters. The hydraulic fluid that came out of my 2018 CK3510HST looked very similar to the new fluid I put in to replace it. There was also no metal at all on the drain plug magnet. I'm not saying I regret changing it, but if I knew it was going to be that clean I probably would not have changed the fluid. Someone might consider collecting the fluid in a very clean container so it could be returned to the vehicle if it looked as good as mine, but planning to run out and buy new fluid if it looked bad. This would provide a chance to examine the drain plug as well, and even filter the fluid as it went back in if desired.
Also worth noting! After some investigation prior to the change (because where am I going to find a 6 gallon container that fits under the tractor?) I learned that a 2 gallon container of Super Tech (Walmart) 20-50 motor oil just fits under the drain plug. Three of those containers will hold all the hydraulic fluid if you can swap them out quickly.
"ATD Tools 5183" is a nice large, fairly low, drain pan that holds about 7.5 gallons.