Where is a good jacking point?

[HankC]

I need to replace the rear axle assembly on my Jinma 304. Would any one know where a good jacking point would be to raise the rear tires without damaging the tractor?

Thanks,
Hank

 

[George2615]

Not sure on your Jinma but if I need to remove or change a rear tire (or work on an axle) I place a floor jack under the middle of the tractor rear end and jack it up so the tires just clear the ground. Then I put 2 jack stands under the axle, one each side of the jack, then carefully unbolt the wheel and with help walk the tire off the axle. I say with help because my rear tires are filled and have a bit of weight to them. Once both tires are removed I lower the axle onto the stands. The axle housing should be plenty strong enough to lift and support the tractor.
I also jack up the rear like this to install my winter chains.

 

[HankC]

Thanks George,
I've never done this so I just want to be sure that the transmission/differential casing will take the strain.

 

[RoyJackson]

I jack directly under the draw bar bracket.

 

[oldballs]

Not sure on your Jinma but if I need to remove or change a rear tire (or work on an axle) I place a floor jack under the middle of the tractor rear end and jack it up so the tires just clear the ground. Then I put 2 jack stands under the axle, one each side of the jack, then carefully unbolt the wheel and with help walk the tire off the axle. I say with help because my rear tires are filled and have a bit of weight to them. Once both tires are removed I lower the axle onto the stands. The axle housing should be plenty strong enough to lift and support the tractor.
I also jack up the rear like this to install my winter chains.

I just went thru this while mounting chains on the B2620 Kubota. There wasn't enough clearance between the tire and the transmission housing to rest my 6 ton jack stands under the axle, while using the floor jack to to raise the rear end (a padded jack head). The result was that the tractor tilted over when the chain was lifted onto the wheel/tire. Thus, I added a bottle jack to the axle on that heavy side. Was kinda disappointed, because I would have felt better if the rear end was resting on the jack stands.

A larger tractor probably has more clearance between the wheel/tire and the transmission housing.
Cheers,
Mike

 

[George2615]

Just make sure you have a floor jack and jack stands rated strong enough. Tractordata says your 304 total weight is around 4K. A 2T floor jack should be fine since you are only lifting the back end and not the whole tractor.

 

[George2615]

I just went thru this while mounting chains on the B2620 Kubota. There wasn't enough clearance between the tire and the transmission housing to rest my 6 ton jack stands under the axle, while using the floor jack to to raise the rear end (a padded jack head). The result was that the tractor tilted over when the chain was lifted onto the wheel/tire. Thus, I added a bottle jack to the axle on that heavy side. Was kinda disappointed, because I would have felt better if the rear end was resting on the jack stands.

A larger tractor probably has more clearance between the wheel/tire and the transmission housing.
Cheers,
Mike

On a smaller tractor like yours do you have any kind of sub frame that you can put a stand under, say in front of the rear tires. The OP's tractor is a 30 HP which is a little smaller than my LS XR3037HC. I do have room for the stands under the rear or under my loader sub frame which runs under the tractor to the rear.
Or you could make an adapter for your floor jack like this one.

 

[HankC]

Since I will be replacing the complete rear axle & housing on one side I'll have no real place to put jack stands, the sub frame will also have to be removed to do this. So I guess I'll need a central jacking point (transmission housing) and once I remove the tire on that side all the weight should rock the tractor to the opposite side (I hope) with the tire. Safety is of course the prime issue so I'll have to check if there are other locations where a jack stand could be placed to prevent tipping. Also considering building up a support platform to put under the transmission so as not to rely solely on the jack.

 

[oldballs]

It appears to me that "jacking it up" is the easy part. Maybe rigging some cushion for the housing would protect it from any nicks or chipping. It'll probably be okay in that regard. It's making it stable so as to work on it that's the problem. Your custom support platform looks like the way to go. But there are lots of other folks on TBN that might have better ideas.
Cheers,
Mike

 

[4570Man]

If you could find two engine hoist you might be able to lift it up from the top. My engine hoist is rated for 4,000 pounds, so two would easily lift your tractor.