How Full to Load Tires?

Tim in New York · Dec 2, 2017

Neighbor bought a new NW Workmaster 37 last fall and had the tires loaded. He got around to checking the tire pressure this week and has 26 lbs. That seems way too high, so he tried to let out some air, but stopped as he was getting fluid also. He had the valve stem at the top, so I am thinking he has more fluid in the tires than he should - thought I remembered that tires should only be loaded 75%?

So I am thinking he can just let out air and fluid to get the pressure down to where it should be - assuming 75% loaded is correct. Is that true?

Thanks,
Tim

Dieseltech · Dec 2, 2017

MF dealer I worked for always set the fluid level no higher than what the level would be with the stem at the top. An air cushion is needed to help protect the tire when a sudden shock load is hit. Drain it down some and then set the pressure as needed.

Steve@Advance · Dec 2, 2017

Might help to jack the weight off the tire first.

Loose less fluid that way.

moresmoke · Dec 2, 2017

Sometimes the bit of squish at the bottom of the tire is enough to push the fluid a bit above the valve stem as Steve said. The liquid adapter I have will fill the tire about 1/2 inch above the valve stem hole, so you will get some fluid that comes back out when releasing pressure.

old · Dec 2, 2017

To let out air on a tire filled with fluid one has to jack it up or yes you will get more fluid then water since the valve stem is not a the very top of the tire but only the top of the rim so the air pocket is about the valve stem so you have to force the fluid down to the bottom by jacking it up

rusty6 · Dec 2, 2017

(quoted from post at 10:43:56 12/02/17) To let out air on a tire filled with fluid one has to jack it up or yes you will get more fluid then water since the valve stem is not a the very top of the tire but only the top of the rim so the air pocket is about the valve stem so you have to force the fluid down to the bottom by jacking it up

My JD 2130 must have more than that because even on the jack I could not get anything but fluid to come out of the valve. I guess the previous owner ran it that way for years with no problems. Just can't use a gauge on it. I go by how much the tire bulges . If it looks low I'll add a little air.

Dave Sherburne, NY · Dec 2, 2017

The fluid level should be such that the rim at the top is covered with fluid. Try parking it so one side is higher than the other and then check with the valve stem at it's highest point

JD Seller · Dec 2, 2017

If the fluid covers the entire rim the rim will not rust. If the rim is exposed at the top it will rust faster. This is true on tubeless rims. We always filled tub type the same.

Tim in New York · Dec 3, 2017

Thanks everyone for the responses. Turns out he tried it again right after I posted this and the fluid coming out was just the little bit in the valve stem. So he was able to get the pressure down to 15 without losing much of the ballast.

Tim

How Full to Load Tires?

Tim in New York

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Dieseltech

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Steve@Advance

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moresmoke

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old

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rusty6

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Dave Sherburne, NY

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JD Seller

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Tim in New York

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