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Thread: jcb 409

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    jcb 409

    I have an elderly 409 with scrappy tyres, but good enough for my occasional use. One appears to have the tread separating from the inner cover and deflates in different places, I am going to buy 2 part worns for that axle, would that be OK or would I need to replace all 4?

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    Senior Member Footsfitter's Avatar
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    Re: jcb 409

    Quote Originally Posted by rangerover View Post
    I have an elderly 409 with scrappy tyres, but good enough for my occasional use. One appears to have the tread separating from the inner cover and deflates in different places, I am going to buy 2 part worns for that axle, would that be OK or would I need to replace all 4?
    Has it permanent 4wd (possible) or even a differential between front and rear axles (unlikely) ?

    Rule of thumb if its 4wd all the time is that its best to try and match up tyres on both axles to reduce wind-up in the shafts between them especially if there is road work involved.
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    Senior Member T P's Avatar
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    Re: jcb 409

    409 (JCB?)

    http://www.rmcallistertractors.com/m...etails/?id=178

    sort of thing,
    is indeed permanent 4wd.If it's mostly used in the yard it wont matter too much as there's usually a difference in the rolling radius between the loaded end and the rear with a bit of weight on. If you can find a tyre with the same rolling radius as the others all the better. For occasional use it's neither here nor there but on a lot of road work it adds unnecessary strain to the diffs , propshafts etc .If the replacement is a bit big you could run it softish to make the rolling radius less but best keep it at the rear as it's no fun discovering a soft wheel on the loaded end with a heavy load across a slope. If the replacement is a bit small blow it up good and hard. The biggest problem I saw with 409's was the poor centre pivot which can be an expensive day out when it fails.

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    Re: jcb 409

    Quote Originally Posted by Footsfitter View Post
    Has it permanent 4wd (possible) or even a differential between front and rear axles (unlikely) ?

    Rule of thumb if its 4wd all the time is that its best to try and match up tyres on both axles to reduce wind-up in the shafts between them especially if there is road work involved.
    Yes that is my concern, it is 4WD all the time. Little road work though. I know where there are a set(4) for 600 half worn, but two less than half that. I haven't seen them yet but I also know where there are new for 235 each, trouble is I only use the thing occasionally, it is used much more than the tractor.

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