Posted by 730d se on December 27, 2009 at 18:32:02 from (64.12.117.11):
In Reply to: 420 John Deere crawler posted by Brian Allen on December 27, 2009 at 17:55:27:
Unless you are very familar with crawlers and under carriage wear, I would never consider buying one unless it runs. Crawlers have many things in common with tractors, but then the under carriage and steering clutches are a world to themseves. For instance, these crawlers use dry clutch packs for steering. They get oil soaked over time as seals begin to leak, or someone over fills it. They will steer OK when cold, but as the packs heat up from use, you begin to lose steering control on one or both sides. Here is the tough part. No matter what they tell you, this is not "an adjustment", there is only ONE way to fix it. You have to tear it down and replace the disk. There is a lot of labor if you do it yourself, and the disk are not cheap either. Unless you really know this owner or know for a fact that it is just missing spark, I would wait on a good one. Depending on the sheet metal, $3,000 is not far from what you would pay for a good running crawler. Have you measured the chains? Look at the bushings and pins? Deep cleats are not always the sign of a good under carriage.
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Today's Featured Article - Oil Bath Air Filters - by Chris Pratt. Some of us grew up thinking that an air filter was a paper thing that allowed air to pass while trapping dirt particles of a particles of a certain size. What a surprise to open up your first old tractor's air filter case and find a can that appears to be filled with the scrap metal swept from around a machine shop metal lathe. To top that off, you have a cup with oil in it ("why would you want to lubricate your carburetor?"). On closer examination (and some reading in a AC D-14 service manual), I found out that this is a pretty ingenious method of cleaning the air in the tractor's intake tract.
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