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John Deere Tractors Discussion Forum
Show Parts for Model:

BEST WAY TO REMOVE THE FRONT PULLEY/ HARMONIC BALA

Author 
4520 Owner

02-18-2004 19:58:17
207.241.134.84



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Any good suggestions on how to remove the front pulley/harmonic balancer on the 4520 John Deere? I don't have a big enough puller. All suggestions will be appreciated.




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JC

02-19-2004 13:30:38
192.52.57.34



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 Re: BEST WAY TO REMOVE THE FRONT PULLEY/ HARMONIC in reply to 4520 Owner, 02-18-2004 19:58:17  
I strongly recommed changing the harmonic balancer at the suggested hours. A friend of mine didn't, the balancer failed, and the engine was severely damaged. I'm not experienced on these larger engines, just passing along the experience of a friend.

Detroit Diesel also recommeds changing it "at time of normal major engine overhaul, regardless of apparent condition" and "inspect periodically and replace if dented or leaking".

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david val

02-19-2004 12:45:52
80.230.188.76



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 Re: BEST WAY TO REMOVE THE FRONT PULLEY/ HARMONIC in reply to 4520 Owner, 02-18-2004 19:58:17  
in cases when one of the pump drive bolts were broken in the pulley, prying CAREFULLY with two pry bars from both sides sometimes did the trick.
david



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50bmg

02-19-2004 08:11:27
206.72.15.73



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 Re: BEST WAY TO REMOVE THE FRONT PULLEY/ HARMONIC in reply to 4520 Owner, 02-18-2004 19:58:17  
I made a bar puller like ET described. Used it on my 7520-worked great.



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ET

02-19-2004 07:07:32
134.179.136.130



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 Re: BEST WAY TO REMOVE THE FRONT PULLEY/ HARMONIC in reply to 4520 Owner, 02-18-2004 19:58:17  
I use a bar puller like the other guys said and reinstall the crank bolt without the washer. I remove the two hydaulic pump drive screws from the pulley and use 2 3/8" bolts through the bar puller screwed into those holes. This way you are not pulling through the rubber in the pulley. John Deere recomends changing harmonic ballancers every 5000 hrs. or when there is any type of crankshaft failure.

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DON

02-19-2004 06:11:49
63.91.25.210



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 Re: BEST WAY TO REMOVE THE FRONT PULLEY/ HARMONIC in reply to 4520 Owner, 02-18-2004 19:58:17  
USE A BAR PULLER. I SCREW THE CRANK BOLT BACK IN MINUS THE WASHER , FOR THE JACK SCREW TO PUSH ON . TO INSTALL I USE A LONGER BOLT AND SIMPLY PUSH IT BACK 0N. HOPE THIS HELPS. DON



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Bob

02-18-2004 20:16:52
66.163.134.177



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 Re: BEST WAY TO REMOVE THE FRONT PULLEY/ HARMONIC in reply to 4520 Owner, 02-18-2004 19:58:17  
Beg, borrow, rent, or steal (just kidding), an appropriate puller. And be sure to get the disc or plate with it that goes over the end of the crankshaft for the puller to push on, so you don't wind up with the puller screw jammed into the threads inside the end of the crankshaft.



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