Cleaning / Lubing Colt double action internals

Grease points for Colt DA revolvers are as follows:

On the front and back side of the DA strut on the hammer.

On the single action notch of the hammer and the flat ledge just above it.

On the rear area of the hammer skirt where the rebound lever rebounds the hammer.

On the top, bottom and sear face of the trigger.

On the front edge and outside of the hand.

On the slot inside of the hand where the rebound lever rides.

On the top of the rebound where the lower leg of the mainspring rides.

On the two hooks of the mainspring.

The bolt is powered by the tiny spring, check to see if it's in place. The screw in the bolt should be tight, but not to the point where you risk breaking it.

The bolt is activated by the rebound lever. Unless the pin at the rear that holds it in the frame is out of place, simply installing a new main spring shouldn't have affected bolt function.

Make sure the front of the rebound is properly in place under the hand. Often during disassembly the hand slips outward and the rebound slips off the ledge in the slot on the back of the hand. The rebound and thus the bolt will not operate correctly.

To check bolt function with the side plate off, put a finger on the hand to prevent it from slipping outward and out of place.
With the side plate in place just look up inside the frame as you operate the hammer.

In either case, the instant the hammer starts to move back the bolt should begin to drop.
You can view the operation of the bolt "tail" as the tiny triangle surface pushes the tail upward, which caused the front of the bolt to drop into the frame.

This should allow you see WHY the bolt isn't operating, which will likely be something out of place which is preventing the tail of the bolt to be engaged by the rebound.

When the hammer is cocked far enough, the bolt tail will slip off the rebound with a clean "click".
When the hammer is lowered again, the tail of the bolt should snap back onto the triangular surface on the rebound.
If something is out of place or "whatever", the tail of the bolt will not snap back onto the rebound, and the action will operate without operating the bolt.

Repairs in order:

1. Send it to an expert for an expert repair.

2. Lower the rebound. This is shown and discussed on pages 102 through 106 of the Kuhnhausen manual, and the actual bending process is shown on page 164 and 165.

Pay close attention on WHICH WAY the rebound needs to be bent. It's opposite of what seems it should be bent.
If the rebound is too high and the bolt isn't resetting, you need to FLATTEN the rebound to lower it. Arching the rebound raises it.

Note that it doesn't take too much to affect bolt reset when it's close. Bend in very slight mounts to prevent having to bend it back and work hardening and possibly breaking the rebound.

What I found is that the less work you do on a bolt the better. Other than fitting the front to the cylinder notches and bending the rear tail to correct timing, it's best to not touch anything else.
One other point..... don't bend the tail while it's in the gun. Bolt screws can snap off in the frame if you bend while it's in the gun.