How to set toe in on Jinma 224?

[TSMART]

My front (ag) tires are shot. But the wear clearly shows that they are shot on the outside edge, whereas the inside edges are only HALF as worn. They both look tilted out at the top of the wheel. (as seen from the front of the tractor)

I am certain nothing on the front end is bent, I have had the tractor since new.

I gather from other posts that caster/camber cannot be changed, but I must soon buy new front tires and I want the new ones to wear more evenly.

312 hours since new, theres no visible wear at all on the rears.

Are there any pics out there on this procedure?

For the record, I often have to travel about one mile on paved road to get between two properties I own. And that is done in third/high 2wd.. Maybe the asphalt is eating them??

 

[Diamondpilot]

It is the asphalt but to set the toe in I adjusted the cross arm between the two front wheels so that the center of the tread is 1/4" less than the center of the tread of the rear. That is take the front wheels and measure at 6 and 9 o'clock. Your measurements should be 1/4" differnet, for example 59" rear and 58 3/4" front.

Chris

 

[TSMART]

Thanks...but to be clear....you said 6 and 9....6 is in contact with the ground, so may I assmume you meant 3 and 9?

 

[Rich Waugh]

See, that's what happens when you spend too much time using digital watches!

Rich

 

[greg_g]

312 hours since new, theres no visible wear at all on the rears.

Under normal conditions, front wear should not be that much different from rear. So I also suggest disengaging the front drive while on hard surfaces.

Further to what Chris says, first center the steering wheel. With the tractor running, turn the steering wheel right and left while watching the chrome part of the hydraulic cylinder. Right where it transitions from "in" to "out" is center. Shut off the engine and jack up the front end far enough where you can rotate both tires. Align one front tire with the rear, then block it so it can't move right or left. Then adjust the length of the pull rod until the front wheels are toed in - ideally to the 1/4" Chris mentioned. I measure the distance from a right inside lug to a left inside lug on the front of the front tire, then right inside lug to left inside lug on the rear of the front tire. When the rear is 1/4" to 1/2" wider than the front, I quit. I don't know what the Jinma tread width is anymore, but I did my TS354 recently. When I finished the front lugs were ~42" apart inside, the rear lugs were ~42-3/8". That was close enough for me.

//greg//

 

[Turbo]

I take two peace of ply wood size of you tires and secure to the outside of the tires, then measure to the center of your hub, and mark the edge of the wood 9 O'Clock front and 3 O'Clock back for reference point, make sure your straight with the rear tires, now you can measure of the ply wood, and adjust without loosing your point of reference.

 

[Eagleview]

Firstly , if the tyres are still ok , I would change them from side to side so that you are now running on the good part of both tyres to get some more wear from them .

When i do an alignment , I jack up each wheel and spin it . I hold a screwdriver on a block of wood to mark a line around the center of the tyres . This makes for a true reference line so that tyre/rim wobble is not giving a false reading . Two pieces of tin with a little grease between them under the tyres stops them binding on the ground , also giving a false reading which will be evident as soon as you move the tractor . Center the steering wheel with two straps .

Now get someone to hold the tape on the line of one tyre , don't use the end of the tape as it moves a 1/16th for external and internal measurements . Then turn the tie rod until you get the correct measurement . The other guys say 1/4" , I would think zero myself . Measure the rear first as you will then know how high you can put the tape before it fouls on the engine sump . Measure the same height at the front , 3 o'clock and 9 o'clock positions if you can .

 

[greg_g]

The other guys say 1/4"

Jinma says 10mm. I make that out to be just a hair over 3/8"

//greg//

 

[Diamondpilot]

Thanks...but to be clear....you said 6 and 9....6 is in contact with the ground, so may I assmume you meant 3 and 9?

You are correct. Stupid me!

Its 3 and 9 o'clock.

Chris

 

[TSMART]

OK check out the wear. You still think I should flip these tires to even out the wear? Or are they too far shot. I know if these were car tires, they would be gone, but how much utility do I have left here?