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Chicago 4260 locks

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https://www.barthmobile.com/eve/forums/a/tpc/f/3631087061/m/5873995477

09-16-2012, 12:11 PM
Steve VW
Chicago 4260 locks
Finally getting around to some cosmetic and prepaint work. Decided to change the T handle locks on the basement doors. One was broken, all were corroded to some degree. (New one on right)



They are fairly easy to change. Let's get started.



Remove the nut and latch arm from inside. The handle assembly will pull right out.





Drill out the rivets. If you're careful you might be able to refasten with rivets but I'm planning to remove them again later to paint, so I drilled through and I'm using stainless through bolts to reattach them.



You can now twist/yank/hammer the lock body out of the door.



Replace with new lock body and screws. (Normally I would caulk them but I'll be removing them soon.)



To remove the lock cylinder from the handle assembly, put the assembly in a vise, and insert the key. There is a hole in the assembly to release the lock cylinder. If you push in the hole with a nail, etc, while twisting and pulling the key slightly, the cylinder will come out. DO NOT REMOVE THE KEY! (It now holds the tumblers in place)





This is the time to clean/lube the cylinder. If you are rekeying, you remove the key and tumblers, replace with new ones. I bought the locks without cylinders to reuse the old ones. (If you have to replace a cylinder, you can put the old key and tumblers into the new one. Maybe my next lesson!)



The key cylinder can now be inserted into the new handle assembly. Push in while turning and it will seat. Now you can remove the key!



Reinstall the handle into the new lock base. You may have to adjust the latch arm to grab the door frame correctly but most of mine fit right in.





Not too bad a job. They look and work better. I changed all 11 of mine. (Ouch, $35 each from MrLock...) confusion


9708-M0037-37MM-01
"98" Monarch 37
Spartan MM, 6 spd Allison
Cummins 8.3 325+ hp
09-16-2012, 09:20 PM
Kirk & Elise
Nice work Steve. We don't have these particular locks on our coach, but I found the tutorial informative and interesting just the same. cheers

Kirk


1989 22' Regal
454
04-15-2018, 03:55 PM
Dana
Point of interest. On DBarth the locks were not all clocked the same when I got her. I went and reset all of them to turn the same direction. You could never tell if one was binding or having issues. Now I know they all turn the same way!


Dana & Lynn
1997 38ft Monarch front entry
Spartan Mountain Master Chassis
Cummins 8.3 325hp
Allison MD-3060 6 speed
22.5 11R
Cummins Factory Exhaust Brake
8000 watt Quiet Diesel Generator
9608-M0022-38MI-4C
Christened Midnight

1972 22ft
72081169MC22C
Christened Camp Barth
12-17-2020, 10:59 AM
2Puppers
Considering changing from our E3-35-35 locks (over 10 need to be replaced) with a keyed T cam style or something else. This tutorial is great, thank you @Steve VW.

To do it again would you stick with this style or try something else?
12-17-2020, 11:30 AM
Steve VW
quote:
Originally posted by 2Puppers:
Considering changing from our E3-35-35 locks (over 10 need to be replaced) with a keyed T cam style or something else. This tutorial is great, thank you @Steve VW.

To do it again would you stick with this style or try something else?


Good question! It has been some time since I did this, prices and options may be different. I have since sold that coach. I was a bit disappointed with the fact that the new locks (like the OEM) are made from die cast alloys and are not very corrosion resistant.

The locks on my Monarch are worse. They do not cam closed well, you must push in on the door to get them to hook over the inside lip.

Let us know if you find a better alternative! Thumbs Up


9708-M0037-37MM-01
"98" Monarch 37
Spartan MM, 6 spd Allison
Cummins 8.3 325+ hp