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John Deere 50


 
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Freddie Blackmon
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PostPosted: Wed May 01, 2013 9:28 am    Post subject: John Deere 50 Reply to specific post Reply with quote

I am restoring a John Deere Model 50 tractor. I got the engine started, but oil is leaking out of a hole in the bottom of the left side main bearing housing (crank side).

Can someone explaint he purpose for this hole and why oil is coming out? Should I tap the hole and put a plug in it?
 
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Mark-Ia
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Joined: 29 Jan 2011
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PostPosted: Wed May 01, 2013 9:32 am    Post subject: Re: John Deere 50 Reply to specific post Reply with quote

You need to replace the flywheel seal.
 
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jturbo10
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Joined: 12 Feb 2006
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Location: East Texas

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PostPosted: Wed May 01, 2013 1:30 pm    Post subject: Re: John Deere 50 Reply to specific post Reply with quote

The oil is coming out of the "oil slinger" seal. Behind the crankshaft housing is a metal oil slinger which has an internal seal and between the oil slinger and main bearing is a thrust washer which is made out of some laminate type material which has a tab at the top. The flywheel has a dowel type pin that mates with the oil slinger slot. Gaskets for the housing and oil slinger are fairly cheap but the thrust washer is about $55. John Deere should be able to get all the parts you need. I just replaced one on my 630 JD. My flywheel was stuck to the crankshaft and I had to make a two bolt flywheel puller using flat 1/2 steel drilled out to fit 5/8 in bolts and a 1 in socket to fit against the crankshaft. You will have to remove the large adjusting nut on the outside of the flywheel. You will have to check your specks for the JD 50 for end play. I also replaced the flywheel bolts with fine thread grade eight bolts I got from Fastener"s...believe they were 3/4 x 4/1/2. Torque for flywheel bolts are 275-280 ft/lbs on 630 but believe they are around 150-175 for 50. Not a hard job but it takes time and you have to be sure you get the end play correct and bolts torqued properly or you will regret it.
 
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gtx1967jewison@yahoo.com
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PostPosted: Thu May 02, 2013 7:51 pm    Post subject: Re: John Deere 50 Reply to specific post Reply with quote

Torque must be reduced when using fine thread, your flywheel has now been overtightened & is likely to crack. :'(
 
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gtx1967jewison@yahoo.com
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PostPosted: Thu May 02, 2013 7:53 pm    Post subject: Re: John Deere 50 Reply to specific post Reply with quote

The oil return hole on the slinger is simply plugged. Take apart, clear the return hole, reassemble PER A MANUAL, &the enjoy Smile
 
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