Hot UDT

[chim]

Tonight I was pushing the 7500 more than normal. My Brother-in-law's ZTR was broken, so I went over to cut his grass. It's about 2 acres, and the last part of it needed 4WD to make it up the hill in the front. I was running at PTO RPM (around 2600), a bit faster than I normally run because his grass is so thick and tall. Right after that, I drove back to my place - about 500' - and started in on my grass. I noticed the steering was sluggish. The power steering on my tractor is usually spin-it-with-your-pinky easy, but turning it took some effort. Just on a hunch, I got my IR thermometer out of thr truck and shot the hydro cooling loops in front of the radiator with the engine running. They averaged around 160°F. I then took a garden hose and deluged the loops with cold water with the engine still running. After a few minutes, I reshot the temperature, and it had dropped to around 120°F. Hopped back on and finished mowing with normal power steering.

Would Super UDT do this, or is it rated for higher temps. At my 50 hour service, I changed the hydro fluid, using the UDT recommended by my dealer. Maybe at the next service I should use Super UDT? I thought I remembered seeing something that indicated Super UDT was designed for cold weather. Any info is appereciated......................chim

 

[ronjhall]

Chim
When I was checking temperatures on my 2910. I found it would be as high as 185 degrees.
The recommended oil for HST model <font color=orange>KUBOTA’s</font color=orange> is Super UDT. But <font color=orange>KUBOTA</font color=orange> does not do a very good job of telling their dealers or field representatives to use it. /w3tcompact/icons/eyes.gif Your manual will say that either one is OK.
Check to make sure oil level is correct in the transmission.

 

[Boondox]

Chim -- The only time I ever saw a Kubota with sluggish steering the owner had allowed the level to drop and it got all frothy. The problem went away after he topped it off. How's your fluid level?

I'm running super UDT in my L3010, but that's for the bitterly cold winters around here. I've never worried about the heat.

Pete

 

[chim]

Ron & Pete, thanks for the input. Fluid levels are OK. I called the dealer today and went through this with him. He said the Super UDT has more synthetics in it and doesn't break down as easily as the regular UDT. What I'd really like is spec's on both oils. Next service interval I'll go with Super UDT just to play it safe.

I noticed there was a post made this morning under "Re: B7500 vs BX2200 Mowing" on this board where the poster noted a similar quirk with his 7500..............chim