Vernon Lowe
Active Member
What size is the nut on the stick boom cylinder rod end?
-
Thank you for visiting HeavyEquipmentForums.com! Our objective is to provide industry professionals a place to gather to exchange questions, answers and ideas. We welcome you to register using the "Register" icon at the top of the page. We'd appreciate any help you can offer in spreading the word of our new site. The more members that join, the bigger resource for all to enjoy. Thank you!
Cat 225 sn#51u725 stick boom cylinder shaft nut
- Thread starter Vernon Lowe
- Start date
heymccall
Senior Member
Stick boom???
I has no idea which cylinder that means, so I picked a stick cylinder. Nut is #6.
I has no idea which cylinder that means, so I picked a stick cylinder. Nut is #6.
Nige
Senior Member
Cylinder nomenclature. Which one are you talking about, I assume either 2 or 3.?
1 - Boom
2 - Stick
3 - Bucket
1 - Boom
2 - Stick
3 - Bucket
Vernon Lowe
Active Member
the first cylinder on top of the main boom looking from the operator seat
Vernon Lowe
Active Member
#2
Vernon Lowe
Active Member
does drive 4 inches mean the nut takes a 4 inch socket to remove the nut?
Welder Dave
Senior Member
I would think so with a 2 3/4" thread size. It will take some really, really serious torque.
Nige
Senior Member
The nut is nyloc so it will take quite a bit more force to remove than it would to tighten. Probably somewhere in the region of 3000 ft lbs.
TBH this type of assembly is better taken to a hydraulic shop that has a cylinder bench. They would be tooled up for loosening/tightening this size of hardware.
If you re-use the nut it should really go back with a touch of Loctite.
Below the tightening specs for the nut and the bolt. The latest spec says "tighten nut to 500 ± 50 lb.ft. then tighten the nut 35 ± 5° more.
TBH this type of assembly is better taken to a hydraulic shop that has a cylinder bench. They would be tooled up for loosening/tightening this size of hardware.
If you re-use the nut it should really go back with a touch of Loctite.
Below the tightening specs for the nut and the bolt. The latest spec says "tighten nut to 500 ± 50 lb.ft. then tighten the nut 35 ± 5° more.
Nige
Senior Member
Do you have a Parts Manual.? If not I can post the parts breakdown of the stick cylinder if it will help.
Nige
Senior Member
Yes.
Vernon Lowe
Active Member
No I don’t ,thank you
heymccall
Senior Member
Did I pick the wrong one?
Vernon Lowe
Active Member
I think it’s correct
Nige
Senior Member
Sorry, brain fart. That was the right one.