JD 450C final drive sprocket bearings

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Rincon
40C crawler
40C crawler
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JD 450C final drive sprocket bearings

Post by Rincon » Wed May 30, 2018 8:54 am

Right Final drive sprocket bearings went out this weekend. Pretty straight forward job I guess. I have a repair manual. But always good to get some extra knowledge. Do i have to jack up the rear area ? and any other inside look out fors would be helpful. Thanks.

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psprague
430 crawler
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Re: JD 450C final drive sprocket bearings

Post by psprague » Fri Jun 01, 2018 7:23 pm

Do you mean the bull gear bearings?

I've had the right final drive housing off mine. R&R'ing the track was the tough part.
JD 450c forestry, JD 440A cable skidder

Rincon
40C crawler
40C crawler
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Re: JD 450C final drive sprocket bearings

Post by Rincon » Mon Jun 04, 2018 10:43 am

Have not torn it down yet, but yes bull gear area i assume. Bearings seem to be worn out, lost final drive gear oil when it happened and lots of play in the drive sprocket. Do I need to jack rear side of dozer to remove drive sprocket to get to the bearings.?

B Town
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Re: JD 450C final drive sprocket bearings

Post by B Town » Mon Jun 04, 2018 10:50 am

You should not have to jack the crawler. Locate the track master pin and position the pin at approximately the 9-10 position. You will have to split the track, remove the sprocket. You can make a special hanger, pictured in the tech manual, to lift and pull the final drive off. Best regards, Bruce

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psprague
430 crawler
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Re: JD 450C final drive sprocket bearings

Post by psprague » Mon Jun 04, 2018 12:23 pm

Have a spare master pin if you can find one. Sometimes they 'resist' coming out and require 'persuasion'.

ETA: My final drive was leaking because whoever had put the 5/8 bolts in, didn't torque them. Wasn't their only mistake assembling it but it was one of the larger ones.
JD 450c forestry, JD 440A cable skidder

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DBaker98
40C crawler
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Re: JD 450C final drive sprocket bearings

Post by DBaker98 » Wed Jun 06, 2018 11:06 am

Is it a loader or dozer
1978 450c loader

Rincon
40C crawler
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Re: JD 450C final drive sprocket bearings

Post by Rincon » Sat Jun 09, 2018 12:30 pm

Dozer

hogbare
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Re: JD 450C final drive sprocket bearings

Post by hogbare » Wed Jun 13, 2018 1:19 pm

I did mine a few years back. I blocked up the rear of dozer toward the center, then split track, removed final drive. Went by JD manual to rebuild, reinstall. Its been working fine ever since.
Hogbare

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