Hydro Gear ZT 3100 Transaxle Fluid Change 

Thank you. Just getting ready to change mine after 200 hours.

My reservoirs don’t even show a level after adding two quarts each and filling up to the low fill line. After purging with air the reservoirs are dry.

Having worked IN a major Lawn Mower MFG plant for 40+ years I HIGHLY suggest that you take the HG part number and go ahead and buy rebuild kits for them and possible typical parts that are known to wear out or break, these companies are now designing in obsolescence, I have some specific NOT entry level equipment that you no longer can get what I recommend to you.

I've got a couple of Gravely commercial zero turns and I'm convinced that whomever designed these mowers never took into account the need to access the top bolts on these transaxles. You've got three choices, (1) fill oil through the overflow reservoir but you'll need an entire weekend and a ton of patience, (2) buy a specialty wrench made to bend around corners and have the needed clearance but still give you the torque necessary to get the bolt loose and tight again, or (3) take the rear tires off and still barely manage to get a wrench at it. Any other ideas?

Sure is nice to have a zero turn mower. I got me one around 3 weeks ago. Hustler Fas trak 54 inch deck. 7916.00 . I've went ahead and changed my hydro fluid. You know it is a lot cheaper to buy oil then buy hydro parts. I only got 18 hours on mower and I have changed the engine oil twice. That Kawasaki engine cost over 2000.00 dollars. Who cares about the price of engine oil.

I just serviced my hydro gears and one will not disengage to start the purge process. Are you saying to drive it some and then try to disengage until it works?

And there’s your dinner

Omg...Goot 'n' tight comment....lol

why do you use motor oil instead of hydraulic oil is that what it calls for?

What's the purpose on making this video if you're not going to show everything the right way