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Chicago 4260 locks
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Supporting Member of 1/19
Picture of Steve VW
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

"98" Monarch 37
Spartan MM, 6 spd Allison
Cummins 8.3 300 hp
Posts: 3885 | Location: Kalkaska, MI | Member Since: 02-04-2011Reply With QuoteReport This Post
Supporting Member of 1/16
Picture of Kirk & Elise
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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


1989 22' Regal
Posts: 187 | Location: Northwestern PA | Member Since: 06-14-2012Reply With QuoteReport This Post
Supporting Member of 1/18
Picture of Dana
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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
Allison MD-3060 6 speed
22.5 11R
Cummins Factory Exhaust Brake
Christened Midnight

1994 34ft Side Entry Aristocrat Currently FOR SALE
Christened - DBarth
Spartan Chassis
6BTA 5.9L 230hp Cummins
Allison MD-3060 6 speed
15040S Eaton rear
Banks PowerPack brings HP 268
ProSine 2.5 Watt Inverter/Charger
Build Number#3895

1972 22ft
Christened Camp Barth
No motor, no tranny, no running water
Electric 110 and 12 volt intact and running
Still mobile as a toad with newer brakes, tires and lights
Has Original Fridgeking Air conditioner so far
Posts: 886 | Location: Waseca, Minnesota | Member Since: 12-09-2010Reply With QuoteReport This Post
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