Old model hammerless top lever disassembly
 

Looking for details on this procedure including bolt removal.This mechanism on the 1890 is loose and rattlley but gun locks tight for now. Thanks,Hugh

It ia a Rube Goldberg type of mechanism Looking at it ,the 1910 modification was a real improvement.

Found a You Tube video (Forest Dermid) detailing reassembly of Parker hammerless.Cannot make out the procedure for replacing the toplever.

I have done this with great success and left no evidence of tampering:
https://www.youtube.com/watch?v=YXbrmmiSngw

Actually the barrels are on face. I think the area where the top lever engages the lever shaft is worn.

So is the top lever fully to the left and you can swing the barrels up and down vertically ?

This is the area that first the 1905 bolt wear plate then the 1910 stepped sides bolt wear plate addressed.

Barrels stay closed but with reduced bolt engagement due to bolt not being pressed foward due to wear at top lever -shaft contact point.With action off and floorplate out I can push bolt foward and backward about 0.25 "

Disassembly
 

My problem is what order is this top lever v spring locking bolt assembly taken apart ? In the You Tube reassembly video(Forest Dermid) ,the v spring is replaced first,then the other parts of the top lever assembly are placed.In trying to disassemble by removing the retaining screw first ,I am unable to lift the top lever.What is the trick?.

Will this help?

Mine is the old model with the multiple part toplever assembly.I reviewed the video on Youtube (by Forest Dermid)and he used a screwdriver as a wedge to compress the spring and then insert the toplever.The video did not show all this but appears somewhat difficult.

The Top Lever spring?

1. The V spring
2. The bolt
3. The link (and roller if it has one)
4. The top lever (remove small retaining screw in side of frame tang)
5. The top lever cam.

Done.

I use a small needle nose vice grip to remove the top lever (V) spring.

Thanks Brian. Now if I can get the boogered or staked screw out if the cam. Why this one- the one that is least supported. Even the little toplever retaining screw came out easily after some Kroil. Oh well time ,kroil and maybe a reshaped slot. Harry ,wish I knew where to get one of those needle nose vices-mostly see antique ones in muzzleloading articles.

They are not staked.
Sometimes they are just plain stuck. At times needing to be drilled out.

This one has been worked on in the past .The trigger return spring is wire not the flat spring version .That screw has a thoroughly wallowed out slot- evidence of a past battle.The slot can be recut so I can obtain a purchace on the screw and get it out hopefully. Harry ,I apoligise,you are using a modern vice grip,I had in mind an older end gripping minature vice.Good tip.Thank you,Hugh

Parker did switch to a wire trigger return spring at a point during production.

Did the hammerless guns ever have the flat trigger return spring?The only one I saw in my limited experience was in a 1878 lifter.

Yes. They did. Then a wire spring was used later on. I am not completely sure as to when the changeover was done.

Where did you get these documents Harry?