Help restoring a RCBS Rock Chunker.

[jtf3635]

I've got the ability to utilize an older model RCBS Rock Chunker. It seems to have no movement with the handle as the ram is "seized" in place. I'm trying to figure out where to start this project. It appears to have some rust starting on the ram so I'm thinking a full disassembly and fine grit sand paper will help. Any deals or guides/personal experience would be greatly appreciated.

 

[Rick Richard]

Try spraying the ram with some penetrating oil and let it sit overnight. It you get a little movement, repeat the process until complete movement can be achieved. Afterward, completely disassemble, remove any rust, and wipe down with oil. This would be my approach. Good luck.

 

[David_h]

For seized metal parts (automotive) I've had great success with penetrating oils like Kroil and PBlaster. Apply daily or more and do this for a week or so. Orient the frame so gravity lets it soak.

 

[akdad]

Second the kroil for that application!
Maybe more like steel wool or Scotchbtite than sandpaper when you get it moving. A little gentle heat will help pull kroil in as well.

 

[Buckleman]

Heat. Propane torch

 

[59FLH]

Spray the joints of the linkage as well, and use grey or red scotch brite lubed with a penetrating oil to de-rust the cylindrical parts

 

[Bob Wright]

I hear the press can be rebuilt at RCBS if needed. You might call them and ask, just for info.
I emailed them and will report back what they say

 

[243winxb]

The clearance between ram & frame is no more then .003" If that is ok. Then check for worn linkage.
If you get the ram moving, Break Free CLP, with teflon, will help smooth it out.

A drop of CLP before starting every reloading session, on all moving parts, will keep it working for years.

 

[Reelamin]

PB Blaster, or Liquid Wrench have been the best for me.

 

[David_h]

If it is an old one like mine (circa mid '70s) the paint finish does not look like it would tolerate too much heat so be careful. Otherwise heating the frame can help the oil soak in as it expands. Try heat gun or hair dryer.

 

[436]

I've got the ability to utilize an older model RCBS Rock Chunker. It seems to have no movement with the handle as the ram is "seized" in place. I'm trying to figure out where to start this project. It appears to have some rust starting on the ram so I'm thinking a full disassembly and fine grit sand paper will help. Any deals or guides/personal experience would be greatly appreci

 

[436]

I've got the ability to utilize an older model RCBS Rock Chunker. It seems to have no movement with the handle as the ram is "seized" in place. I'm trying to figure out where to start this project. It appears to have some rust starting on the ram so I'm thinking a full disassembly and fine grit sand paper will help. Any deals or guides/personal experience would be greatly appreciated.

Grab a can of Kroil... once you get it apart soak the rusted parts in Evapo-Rust. Good luck Cheers.

 

[Pdyson]

I watched a guy heat up a big vat of evaporust with an electric charcoal starter to 85-95 degrees and he submerged a 14" 4-jaw Lathe chuck in it for over 24 hours. It took all the rust but didn't attack the metal. If that won't free it up a hot soak in light oil should. I refurbed one a few years ago and it was pretty worn and loose in the bore. I took it apart and flipped the ram 180 degrees and pumped it full of bearing grease…it feels new.

 

[Bob Wright]

I hear the press can be rebuilt at RCBS if needed. You might call them and ask, just for info.
I emailed them and will report back what they say

The response came from Bushnell. Had no idea they held RCBS:

RCBS does not offer a refurbish program due to obsolete parts and manufacturing system we now operate in. If you would like to purchase replacement parts and rebuild them yourself (if available) we could certainly try to assist you in that way. Thanks for contacting RCBS

Dora Paul | Customer Service Lead
RCBS| Weaver | Champion
605 Oro Dam Blvd, East, Oroville, CA 95965
Office: (530) 538 2623
Toll Free (800) 533 5000