Tire pressure

jimlll · Jun 12, 2021

What is the recommended tire pressures for:
A Massey Ferguson Super 90
A Ford 641
Thanking you for all recommendations.

old · Jun 12, 2021

10-15 PSI for the rears and 30 psi give or take for the fronts. A lot depends on what your doing

Janicholson · Jun 12, 2021

old is giving you the ball park. Because the amount of weight added in terms of wheel weights or liquid ballast, the presence of a loader, the sixe and condition of the tires themselves, and the soil conditions, all play a role.
Radial tires respond differently to pressure than bias ply tires. Jim

jimlll · Jun 12, 2021

Thanks for the info.
Tractors have no weights, no liquid in tires, no loader, just bare tractors used around the place.
I & T does not indicate. If tractors had decals, theyre long gone.

old · Jun 12, 2021

Look the tires over real well. Many time the correct pressure is right on the side wall of the tire

rustred · Jun 12, 2021

the standard psi for rear tires is 16 lbs, on pretty well any tractor. its quoted in many manuals charts. then vary from there on what you are doing. wont be much variation. like for pulling, or plowing you will have 2 -4 more psi in furrow wheel. just for riding around you can go 3-5 lbs less . and for tractor pulling on a soft track i have been down to 6-8 lbs.

centash · Jun 12, 2021

if there is a front end loader, drop the rears a bit to 10 or 12 psi and raise the fronts to 40....provided that does not exceed the max pressure listed on the sidewall

Ben

buickanddeere · Jun 12, 2021

The universal minimum pressure for bias ply rears is 12psi . 6 psi for radials .
May as well run the tires a little low, makes for a smoother ride .

jal-SD · Jun 12, 2021

Rule on rear bias ply tires when I was young was 1 pound of pressure for each inch of tread width. Example: 11-38 = 11 lbs, 9-24 = 9 lbs , etc. If the sidewalks squished due to extras cast iron or concrete, add air. In our sandy soils, very few used fluid. This was because many folks believed the liquid was always fighting gravity inside the tire and following behind it as you moved forward. Fluid's center of gravity is never directly above the axel as the tractor moves forward. It made your tractor loose power while lifting the liquid inside the tire. Cast iron & concrete bolted to the wheel kept the weight's center of gravity directly on the axel, not behind it. Probably never been scientifically proven but has many believers that farm soft/sandy ground where tires sink into the soil.

chuck machinist · Jun 13, 2021

Type commercial.firestone.com. Good info for you CM

Texasmark · Jun 13, 2021

Bias ply tires I assume.....pump the tire up till the edge of the tire just leaves the concrete with the normal load attached. on a <100 HP tractor that would be 14-18# for rears, 25-30 on fronts, FEL or not.

Tire pressure

jimlll

Member

old

Well-known Member

Janicholson

Well-known Member

jimlll

Member

old

Well-known Member

rustred

Well-known Member

centash

Well-known Member

buickanddeere

Well-known Member

jal-SD

Well-known Member

chuck machinist

Well-known Member

Texasmark

Well-known Member

Similar threads