Track tensioner 420C

country53 · Post by **country53** » Sun Jul 30, 2006 6:25 am

I replaced the bolts on my 420 with a grade8 bolt I purchased from BigBolt.com . They worked well at first but after a couple trips through the barn yard they have became very rusted just like the ones I took out and very hard to move. Is there any good fix to this problem? Is there a cylinder type tensioner made for a 420C?

Post by **Lavoy** » Sun Jul 30, 2006 5:15 pm

Did you use a plated bolt, or just a plain one?
Hyd adjusters were an option, but not real common, and not a real good setup.
lavoy

country53 · Post by **country53** » Mon Jul 31, 2006 4:59 am

Non plated bolt with a cadium plated nuts. I am thinking about making some Brass nuts twice as long as a normal one. Also I talked to an old guy
that still runs a dozer for a living at 82 yrs and he said when you put them on clean and free of dirt they used to run candle wax on them.

Post by **Lavoy** » Mon Jul 31, 2006 9:32 am

The original bolts were plated, I wonder if that is going to be a problem for you. I would use anti-seize, that will help a lot.
Lavoy

CPeter · Post by **CPeter** » Tue Aug 01, 2006 1:33 pm

What is the correct Big Bolt web site? Sounds like an interesting site to have in reserve.

CPeter

country53 · Post by **country53** » Wed Aug 02, 2006 5:03 am

The Web address for Big bolt is http://www.bigbolt.net/
I don't know how to do that fancy stuff where you just click on it.

Post by **Lavoy** » Wed Aug 02, 2006 7:44 am

You just did, it worked fine.
Lavoy

Post by **Lavoy** » Wed Aug 02, 2006 8:29 am

Just thought of something, have you tried a stainless nut?
Lavoy

country53 · Post by **country53** » Wed Aug 02, 2006 8:40 am

No, I haven't yet. I probably will try something in the future, I may have been tightening against the spring because I pulled it out last night after completing ring and pinion rebuild and I noticed both tracks were so tight one could have probably played the musical note of "G" on them there both the same I will need to loosen them before I use it. There might not be a problem after all. Dozer operates good after rear end rebuild. Battery charging right now might get some time to play this weekend

CPeter · Post by **CPeter** » Thu Aug 03, 2006 7:12 pm

Just out of curiosity, how much were the tensioner bolts? Did you use grade 5 of grade 8?

CPeter

country53 · Post by **country53** » Sat Aug 05, 2006 4:25 pm

I used grade 8 I ordered extra threads (14" I think). Cost was about $35.00 ea

Post by **Lavoy** » Sun Aug 06, 2006 10:36 am

Did they make it up for you, or was it a stocking item? How much extra would it have been for plating, or don't they do that?
Lavoy

country53 · Post by **country53** » Sun Aug 06, 2006 12:36 pm

They custom made the bolts I bought. They will plate for a fee. They also roll threads as well as cut threads about anything oe would desire

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