SB 1842bn Firing pin won't return

It could be one or both of the return springs are damaged (this typically happens when you fire the gun without it being against timber, had a young apprentice firing across a worksite for fun which wrecked the springs), could also be that the firing pin is bent or there is an obstruction in the cylinder preventing the pin which is fixed to piston from returning correctly.

How bypass to get sound through the sub I don't have that cord to sa - Ht 920

If you're getting a good dent, it's the ammo, not the gun. The good dent is all you hired the firing pin and spring to do. They did their job....don't blame them for the screwed up part time workers.

You are correct on the firing pin. Those rim fire caps have to be struck by a firing pin or it won't fire. Pull the head apart and see is the firing pin stuck or missing.

Lubricate it and crank up air pressure and return spring.

Go to menu then shooting and turn on ttl

Can u adjust the drive depth on the tip of the gun? My nailers all have a knob to adjust the drive depth. Also, what pressure are you using? I typically shoot mine between 90 and 120 psi. Hope this helps.

HI, I have a SB-400 with cracked housing, and hope to find a broken one to replace my part. Any offer is very much appreciated if you are interested of selling yours! Sincerely, Samantha (utwicky at gmail dot com)

The piston is returned to its firing position by air from the trigger valve after the piston has fired. It relys on the piston sealing against the bumper at the bottom of its stroke, if the bumper was damaged when the driver shattered or it was put in upside down the piston will not return. Also the piston uses air fed into the return chamber from the little holes in the cylinder, if the seal over these holes is damaged the piston may not return. Basically change the bumper and the check seal on the cylinder.

IMPORTANT Recall info:
WINCHESTER MODEL 100 FIRING PIN RECALL - A notice dated 7-1990 relates the following
“PRODUCT SAFETY WARNING AND REPLACEMENT NOTICE. Attention owners of Winchester model 100
rifles and carbines please read this notice. In July of 1990 the following product safety
warning was issued by Winchester. It has come to our attention that the firing pin in the
Winchester Model 100 Rifle or Carbine may break due to use and metal fatigue and become
lodged in the breech bolt face. If this occurs, the firearm may fire before the action is
locked causing severe damage to the firearm and possibly injury or death to the shooter
and bystander.
WARNING DO NOT SHOOT YOUR WINCHESTER MODEL 100 RIFLE OR CARBINE. Repair and replacement.
A new firing pin has been designed to replace the firing pin originally made for the
Winchester Model 100 Rifle and Carbine. The new firing pins will be available in April
1991. If you own a Winchester Model 100 Rifle or Carbine, please send your firearm to one
of the authorized Winchester Model 100 Firing Pin Replacement Centers indicated below.
Your Winchester Model 100 firearm will be inspected, the firing pin replaced and tested
and the firearm returned to you. The inspection, replacement/testing and return postage
will be accomplished at no cost to you. If other repair or maintenance work is authorized
by you to be performed on the firearm when the firing pin is replaced, such work shall be
at your cost.”
W. R. Long Gunsmiths
2007 Brook Road North
Cobourg, Ontario K9A4W4
Canada Frank LeFever & Sons
RD 2 Box 31
Lee Center, NY 13363
USA Bolsa Gunsmithing
7404 Bolsa Avenue
Westminister, CA 92683
USA Nu Line Guns
1053 Caulks Hill Road
Harvester, MO 63303
USA

If you have any questions concerning this notice, call Winchester Product Service
1-800-852-5734 or write to Winchester Firing Pin replacement Notice, PO Box 10 Cottage
Hills Illinois 62018 Attention Product Service Dept.
----------------------------------------------------------------------------------

The following is Wisner's rendition & info on the subject.
The difference in the old firing pin and the new one is as follows. The old replaced
style, was totally lathe tuned (round). While the new recall style is similar in lathe
turning on the front and back, but in the front midsection it has two flats milled, one
on each side. This makes the center section stronger. Also replaced is the bolt sleeve
lock pin (firing pin guide) which was made to accommodate this different shaped firing
pin
Part number for the new parts are, firing pin =1391ND, bolt sleeve locking pin =1491ND
The word was at the time this recall was in process was that if the firing pin would
break at the mid section and still remain in the gun as two pieces, the possibility of a
premature discharge before the bolt was locked was possible. This apparently was caused
by the firing pin tip (now not having a retracting spring) to be stuck forward, and
thereby slam-firing upon chambering.
The responsibility for the recall apparently was on Olin, as they were the parent company
at time of manufacture. Olin set up regional recall centers at three established US
gunshops. There was a manufacturing delay in the replacement firing pins, and a backlog
occurred, also some collectors did not like the idea of shipping their guns long
distances. Olin then also authorized other gunshops to make the required alterations.
Upon completion of the recall, the shops were to test fire the firearm and to stamp an
assigned letter on the inside top of the receiver as seen thru the magazine well with the
bolt retracted. The letter “B” represented Bolsa Gunsmithing, “L” was Lefever, and “N”
was for Nu-line Guns. The letter “X” apparently was for all the other independent shops.
However this identification information did not get communicated to some of the smaller
shops at the start of the project. The only way to tell if the gun as been modified, if
the ”letter” is not present, is to take the barrel & action out of the stock, remove the
trigger guard assembly and the try to rotate the firing pin by twisting it. If it does
NOT rotate, then the firing pin recall HAS been performed.
For link back to the parts & price list that we make & have for sale CLICK HERE
Copyright © 2004-2007 Wisner's Inc. All Rights Reserved
Back to Additional information To Winchester model 88 & 100 parts
Originated 01-13-2001 Last Modified 03-19-2007
LeeRoy Wisner