Repacking Cylinders
Repacking Cylinders
I'm repacking cylinders on my 580c backhoe. The piston bolts are just a huge pain to get loose. I've got a 950 ft pound 3/4" impact and it will not budge them. The last one I did I put a rock bar thru the eyelet, drove over the rock bar with my skid steer and put a 8' cheater bar on my 3/4" break over.
Why does the impact not work, is because you cant hold it from moving and it looses effectiveness? I gotta find a better way to do this, I'm going to run them by a truck repair shop with a 1" gun and see if he can bust them loose.
Any suggestions or ideas would be greatly appreciated.
Why does the impact not work, is because you cant hold it from moving and it looses effectiveness? I gotta find a better way to do this, I'm going to run them by a truck repair shop with a 1" gun and see if he can bust them loose.
Any suggestions or ideas would be greatly appreciated.
JD- 450C track loader
Serial #208336T
Serial #208336T
Re: Repacking Cylinders
Heat the nut some and hit it while it is still hot.
Lavoy
Lavoy
Parts and restoration for antique and late model John Deere crawlers.
Owner and moderator www.jdcrawlers.com
Owner and moderator www.jdcrawlers.com
Re: Repacking Cylinders
Thank you for the quick Reply Lavoy.
Does it change your opinion any because they are bolts ? One has 1 1/2 " head the other 2 3/8".
Does it change your opinion any because they are bolts ? One has 1 1/2 " head the other 2 3/8".
JD- 450C track loader
Serial #208336T
Serial #208336T
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- 420 crawler
- Posts: 38
- Joined: Sat Sep 23, 2006 12:20 pm
- Location: Columbus, Ohio
Re: Repacking Cylinders
I have a 580D backhoe, the bolts are so difficult to break lose because of locktite. The heat will soften the locktite, making the bolt easier to remove. Something else I have done is to connect the shaft back to the machine, with a block of wood under it to protect the shaft, then use the socket, breaker bar and cheater combination to break it lose.
1960 440 ICD with 602 blade
1960 440 ICD with 831 bucket
1960 440 ICD with 831 bucket, center throttle
1960 440 ICD with 831 bucket
1960 440 ICD with 831 bucket, center throttle
Re: Repacking Cylinders
He broke them all loose with a battery powered 3/4" gun(rated 1350 ft/lbs) and the eye clamped to 1000 pound workbench. I think the key is getting it locked down solid so you get the impact motion without movement.
JD- 450C track loader
Serial #208336T
Serial #208336T
Re: Repacking Cylinders
Yeah, doesn't work on bolts. Did you get them to break loose?
Lavoy
Lavoy
Parts and restoration for antique and late model John Deere crawlers.
Owner and moderator www.jdcrawlers.com
Owner and moderator www.jdcrawlers.com
Re: Repacking Cylinders
Yep, see post above.
Now on to packing! I have a 3/4" click torque wrench, makes tightening them quite easy. Just a bugger to get apart.
Now on to packing! I have a 3/4" click torque wrench, makes tightening them quite easy. Just a bugger to get apart.
JD- 450C track loader
Serial #208336T
Serial #208336T
Re: Repacking Cylinders
I decided to try again to get some apart. I drilled a 1/2" hole into the edge flange of a tandem dual trailer I have. I ran a bolt thru with a piece of 3" angle on top to hold it down and my air impact easily took them apart. It's all about having that rod tight to something immovable. I did just receive a 3/4" cordless impact rated at 1500 so I'm in the tall cotton now.
JD- 450C track loader
Serial #208336T
Serial #208336T
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