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Crawlers, Dozers, Loaders & Backhoes Discussion Forum

Re: Cat 977H Recoil Spring Bolt

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08-25-2013 19:57:19

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NCWAYNE_-when I installed my 941b recoil spring it was separate from the center bolt. My friend had a 50 ton press and he had to build a jig to hold the spring sideways from shooting out and compressed it to the specified length so it could be installed.
i doubled nut the bolt so the 14 ton load didn't let go!! but I had no trouble backing the nuts off

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08-25-2013 22:03:01

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 Re: Cat 977H Recoil Spring Bolt in reply to dpendzic, 08-25-2013 19:57:19  
I can't remember exactly, but if I'm thinking right, the compression force on the 977 springs is well over 20 tons. That being said, the set length on th springs typically puts the ears right at the front of the hold down brackets so the nut doesn't have to be backed off but a little bit to release the spring to where it's resting in place. The ones I was dealing with had been compressed over an inch too far. As such there was a full inch that we had to back out the nut something like 1/8 turn at a time. The one on the left side where we were pulling down wasn't easy, but the one on the right side where we were having to pick up was a real pain.

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