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Author Topic: Changing the Brass Bushing In A "JJ" Penthouse Don Furr Jedi Master Film Handler Posts: 509 From: Sun City, Ca USA Registered: Nov 2002 posted 07-16-2012 05:44 PM                     The top sprocket bushing in my JJ penthouse needs to be replaced. One Forum member suggested using an Arbor Press. Does anyone else have a suggestion how to do it?  |  IP: Logged Monte L Fullmer Film God Posts: 8367 From: Nampa, Idaho, USA Registered: Nov 2004 posted 07-16-2012 07:37 PM                     An arbor press is really your best friend to press out brass sleeves since you can do the push with one even stroke, or the continual turn of the stand wheel. And, they're your best friend to press the new bushing back in. Yet, if you can modify, or add attachments to a bench vise, this can be the second best way, but just have to be more careful.  |  IP: Logged Gordon McLeod Film God Posts: 9532 From: Toronto Ontario Canada Registered: Jun 99 posted 07-16-2012 08:36 PM                     i usually heat the casting and then put an ice cube on the bushing when putting in a new one i put the bushing in the freezer overnight and then they fit in nice and smooth  |  IP: Logged Pete Lawrence Expert Film Handler Posts: 192 From: Middleburg, PA Registered: Aug 1999 posted 07-18-2012 11:09 AM                     If you don't need to apply a large force, a drill press makes a good substitute for a small arbor press. I've also modified large C-clamps to press parts in and out of various things. A good socket set (1/4, 3/8, and 1/2 inch drives) can provide a large selection of "press adapters" of different diameters and lengths. Buy a cheap extension and cut off the female end. You now have something you can securely attach to a drill press chuck or weld to a C-clamp to hold the appropriate socket in place. An extension costs only a couple bucks at a discount store. Using Gordon's temperature trick makes things go much easier. If you don't want to do it yourself, a local automotive machine shop should be able to do the job for you.  |  IP: Logged Don Furr Jedi Master Film Handler Posts: 509 From: Sun City, Ca USA Registered: Nov 2002 posted 07-18-2012 06:51 PM                     Thanks for your suggestions guys.  |  IP: Logged

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