Yesterday's Tractor Co. Shop Now
   Allis Chalmers Case Farmall IH Ford 8N,9N,2N Ford
   Ferguson John Deere Massey Ferguson Minn. Moline Oliver
Classified Ads
Photo Ads
Tractor Parts

Discussion Forums
Project Journals
Tractor Town
Your Stories
Show & Pull Guide
Events Calendar
Hauling Schedule

Tractor Photos
Implement Photos
Vintage Photos
Help Identify
Parts & Pieces
Stuck & Troubled
Vintage Ads
Community Album
Photo Ad Archives

Research & Info
Tractor Registry
Tip of the Day
Safety Cartoons
Tractor Values
Serial Numbers
Tune-Up Guide
Paint Codes
List Prices
Production Nbrs
Tune-Up Specs
Torque Values
3-Point Specs

Tractor Games
Just For Kids
Virtual Show
Museum Guide
Memorial Page
Feedback Form

Yesterday's Tractors Facebook Page

Related Sites
Tractor Shed
Ford 8N/9N Club
Today's Tractors
Garden Tractors
Classic Trucks
Kountry Life

Garden Tractors Discussion Board

JD 420 Cam Shaft Bearing Question?

[ Expand ] [ View Replies ] [ Add a Reply ] [ Return to Forum ]

Posted by Mike in MI on August 23, 2012 at 19:22:41 from (

Has anyone ever heard of cam bearing going bad in a JD 420 W/P220 Onan engine. I been hearing a fant squelling noise on my 420 when running an it almost sounds like the PTO clutch when you turn it off - it screeches. I decide to check it out and my first thought was the PTO so I removed pto clutch and starting it back up the sound was still there.
I did notice there was oil leaking down from the crankshaft seal and I replaced that and at the same time i done a carbon remove on the heads. After putting all back together I noticed there still was oil leaking from the rear crankshaft seal. Again I thought I might of damaged the seal when installing it so I remove the pto again and as I was wipeing the oil off the block I noticed the welch plug that covers the cam shaft was loose. I went and got a magnet sure enough it fell out. I found out where the oil leak was coming from and also found out that the cam had a lot of end play and I could see a small piece of the cam bearing sticking outward from back of cam.

After removing the engine from the mower and removing the timing cover and removing the crankshaft snap ring and lifters I pulled the cam out and both front and rear cam bearings was galled. Now the cam looks ok and the governor balls and plate are ok. thrush washer didn"t look to bad I mic it .060 not sure what new one mic"s at?

I still don"t know where the end play on the cam coming from? Hopefully tomorrow my parts will be here? I ordered a new thrush washer and bearings. lower part engine checks out ok. Crankshaft end play was only .005 and i think your aloud up to .010 on that?
Engine always had good compress around 124 to 130 lbs difference between the two. I"ll get back on this later

Thanks Mike


Add a Reply



Optional Link URL:
Link Title:
Optional Image URL:
Optional Video Title:
Optional Video Embed:

Advanced Posting Options

Email Notification: If you check this box, email will be sent to you whenever someone replies to this message. Your email address must be entered above to receive notification. This notification will be cancelled automatically after 2 weeks.

Advanced Posting Tools
  Upload Photo  Select Gallery Photo  Attach Serial # List 
Return to Post 

Fast Shipping!  Most of our stocked parts ship within 24 hours (M-Th). Expedited shipping available, just call! Most prices for parts and manuals are below our competitors. Compare our super low shipping rates! We have the parts you need to repair your tractor. We are a company you can trust and have generous return policies. Shop Online Today or call our friendly sales staff toll free (800) 853-2651. [ About Us ]

Home  |  Forums

Copyright © 1997-2018 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