(800) 853-2651
SHOP NOW

520 oil in transmission

J

jdfamily

Member
Good morning guys,
I have a very nice 520 John Deere, have had for a few years. Recently it started losing oil, each time I would check it, the oil was low.
Then I check the transmission fluid and it was way over full. The engine oil is somehow getting into the transmission fluid. First, what is causing this? Second, how do I go about repairing this? I checked the ventilation pump, oil in the air filter, etc. that all seems to be fine. I am not a mechanic by any means, but would like to try and repair this myself.
Thanks.
 
You need to replace the pulley side main bearing seal, part # AB5160R. You'll need to remove the pulley and I'm pretty sure the first reduction cover to access the seal.
 
Thanks, does that mean I will have to take out a crankshaft bearing? Is removing the pulley a hard task, or can an amateur do that?
I have replaced the clutch pads, but that is about all.
 
You should have a manual. Depends on your mechanical ability whether or not you need to pull and main bearing. Is easier with the bearing removed.
 
Thanks for the information. I have the manual and will do some searching on that. Do I understand that it can be done without removing the main crankshaft bearing? Thanks.
 
You need a good puller to get the drive disk off the crank. Getting the old seal out is a little tricky, but the hardest part will be installing the new seal straight and square with bearing in place.
 
jdfamily,

Get a parts manual and look for the live PTO shaft seal in back of the first reduction gear cover. I believe that engine oil in the transmission must go through this seal to get there. If I remember, the clutch side "seal" is actually an oil slinger?
 
On the 2 Cylinder Waterloo Deere engines when the engine oil is going into the transmission it is usually caused by too much clearance in the right main bearing of the crankshaft.
 
You must log in or register to reply here.

Similar threads

3
fork lift question
Replies
14
Views
945
Dennis P
Dennis P
D
Case 930 ck transmission bearing in oil
Replies
2
Views
263
jon f mn
jon f mn
F
Ford Jubilee - oil/fluids
Replies
6
Views
377
Ford Jubilee
F
B
Crank Driven Hydraulic Pump Oil
Replies
4
Views
609
Joel Wittenmyer
J
L
Ford 8630 Transmission Oil Pressure Warning
Replies
3
Views
198
Lee Watkins
L
Tractor Parts Tractor Manuals

We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today.

Copyright © 1997-2024 Yesterday's Tractor Co.

All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.

Yesterday's Tractors - Antique Tractor Headquarters
Website Accessibility Policy

Back
Top