Tires Filled rear tires on my B7510 yesterday

   / Filled rear tires on my B7510 yesterday #1  

btolle

Platinum Member
Joined
Oct 20, 2004
Messages
952
Location
Jasper, Texas
Tractor
Kubota B7510HSD
Used 2 gallons of antifreeze (it doesn't get cold enough in East Texas to need more than that) and then topped off with an unknown number of gallons of water.

Took me about an hour and the most time consuming part was figuring out the cheap plastic pump I bought that said "Self Priming" on the box. It wasn't. That's what I get for buying an $8 pump /forums/images/graemlins/grin.gif Instructions in the box said to prime it.

Total cost was $8 pump, $8 water fill valve, and about $33 worth of antifreeze.

Traction is greatly improved. I hardly ever got enough traction to bog the engine down before and pushing brush yesterday I bogged it down several times.

BTW, I only aired the rears up to 25 pounds. The manual says 40 pounds but I have never run that much, it beat me like the dickens coming home from the dealer with 40 pounds in the rear so I lowered fronts and rears down a lot. Rides better and traction improved when I ran lower air pressure.

I may try letting some of the water out later to see how it does. I filled them with the valves stems at 12 o'clock so they are 75% full now. 50% may work as well and would keep the center of gravity even lower than 75% does.

Has anyone compared 50% fill to 75% fill?

As an aside, I also got the first dent in the hood yesterday. Had a 2" limb caught in the top of the grille guard and extending onto the hood about 4". Forgot which way the loader handle went for "down" and raised it instead. Did I tell you I am old and forgetful? I don't remember whether I had mentioned that before or not..........

Bill Tolle
 
   / Filled rear tires on my B7510 yesterday #2  
<font color="blue"> I may try letting some of the water out later to see how it does. I filled them with the valves stems at 12 o'clock so they are 75% full now. 50% may work as well and would keep the center of gravity even lower than 75% does. </font>

Bill,

Regardless of whether the tires are 50% or 75% full, the center of gravity of the liquid in them will be below the axle, and both have to have a positive effect at lowering the center of gravity or the tractor and make the tractor stable on slopes.

I would bet there is little difference between the two levels as far as net change in the overall center of gravity of the whole machine. Perhaps the difference would show up more in the traction area?

For what it's worth, my tires are loaded 75% in the rear and 100% in the front (foam) and I have never felt the need/want to have less.

An exceptiont perhaps is when it is really wet and soggy and I wonder if I would sink in less with lighter tires (probably not).

I think I run my rear tires at something like 12 psi. I don't check them as often as I should and last time I did they were about 6 psi... /forums/images/graemlins/blush.gif /forums/images/graemlins/blush.gif /forums/images/graemlins/blush.gif
 
   / Filled rear tires on my B7510 yesterday #3  
IN REFRANCE TO USING ANTIFREEZE MY DEALER USES WASHER FLUID. WITCH I THINK IS LESS TOXIC IF YOU GET A FLAT. /forums/images/graemlins/tongue.gif PETS ECT: AS HOW MUCH TO FILL 75% I THINK IS BEST. HOPE THIS HELPS. /forums/images/graemlins/smile.gif
 

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