JD 4630 flywheel JDseller

hoghollow · Jan 20, 2019

Have question for jdseller and others concerning my brothers jd 4630. He was hauling manure with tractor with smaller spreader (not working tractor hard). Came in for another load shut tractor off went to restart and flywheel would turn but engine is not. Split tractor and flywheel bolts are sheared off engine can be turned with wrench on front pulley. He has bolts out of crank and pin out of crank but there is some small grooves in flywheel where it mounts to crank. Should he machine this smooth again or get a different flywheel? I know this was an issue on 4630s Any suggestion as what needs to be done. It is mid production 4630 quad range not turned up or worked real hard any more. plans on keeping and using tractor.I can be reached at [email protected] thanks

tim s · Jan 20, 2019

I have seen this many times,, just sand the surface down clean and re-use it,,put good grade 8 bolts back in and don't over torque them.

Bob · Jan 20, 2019

I agree with Tim.

I've seen a couple that did that.

Take a Dremel or die grinder and grind off any burned-on metal that is "above" the original machined surface.

Use Loctite or your choice of sealant on the bolt threads, as they have been known to swap transmission oil and engine oil past the bolt threads if installed without sealant.

Not a bad idea to check flywheel "runout" with a dial indicator before going back together.

JD Seller · Jan 20, 2019

Tim S has the answer. Seen this happen a time or two.

hoghollow · Jan 20, 2019

Thank you guys for your input. Will clean it up good and reuse

JD 4630 flywheel JDseller

hoghollow

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tim s

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Bob

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JD Seller

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hoghollow

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