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 870 Trigger disassembly
madrhythm  [Team Member]
4/11/2008 6:23:31 PM
Anyone have a exploded diagram or a step by step for disassembling the 870 trigger group?

Thanks
machinisttx  [Team Member]
4/11/2008 10:06:03 PM
Have you tried e-gunparts.com?

Might I also ask(curiosity) why you're taking the trigger group apart?
dfariswheel  [Team Member]
4/11/2008 10:26:42 PM
Here's a exploded view:

www.stevespages.com/ipb-remington-870.html

Disassembly: This is from memory, so no guarantees:

Pull trigger and EASE the hammer down. DON'T allow it to snap forward.

At the rear of the group is a large hollow bushing. On one end is a "E" clip.
Push the bushing out, leaving the clip on the bushing. Part 42 and 43.

At the rear is a silver cross pin above the safety.
Put a finger over the hole on top and push out the pin. Part 44.
The safety will fall free.
Turn the group over and gently tap it on a table to drop the tiny spring and silver ball out of the hole. Parts 49 and 50. NOTE that the plunger shown is now a silver ball.

Push the trigger FORWARD.
Remove the spring between the top of the trigger and sear. Part 55.

At the front of the group is another bushing with an "E" clip. Part 54.
Push it out.
This releases the shell lifter assembly. Parts 57, 59, 60, 61.
Do NOT attempt to remove the carrier dog, washer or pin from the shell lifter. These are riveted in place and are not removed.

Remove the carrier dog spring and plunger from the group under the carrier dog. Parts 62 63.

Push out the trigger pin and remove the trigger assembly. Part 52 and 45, 46, 47.
Do NOT attempt to remove the right or left trigger connectors from the trigger.

Push out the sear pin from the RIGHT to the left. Part 41.
The Right side is partially blocked by the group, so the pin must go to the LEFT.

Remove the sear. Part 37.

The hammer assembly is retailed by the action lock, and the action lock is riveted in place. Part 56.
DO NOT remove these unless you're replacing the action lock with a new piece.
The action lock is damaged by removal and must be replaced with new parts.
Once fully disassembled, the hammer, mainspring, spring plunger, and the action lock will remain in the group. On new guns there's a washer on the Right side of the group into which the action lock is riveted.

Reassembly:

Make sure the left trigger connector goes ABOVE the top of the action lock extension Part 56.

Reassemble the sear spring Part 55 BEFORE installing the safety. This allows pushing the trigger forward to open the space between the sear and trigger.

When replacing the safety, make sure the red band in on the LEFT side of the group.
Hold it there while you drop in the silver ball and the spring.
Push them down with a small screwdriver while you insert the silver pin TAPERED END FIRST.
madrhythm  [Team Member]
4/12/2008 1:34:03 PM

Originally Posted By machinisttx:
Have you tried e-gunparts.com?

Might I also ask(curiosity) why you're taking the trigger group apart?


Just got a police trigger and I'm getting ready to gunkote the thing.
madrhythm  [Team Member]
4/12/2008 1:34:41 PM

Originally Posted By dfariswheel:
Here's a exploded view:

www.stevespages.com/ipb-remington-870.html

Disassembly: This is from memory, so no guarantees:

Pull trigger and EASE the hammer down. DON'T allow it to snap forward.

At the rear of the group is a large hollow bushing. On one end is a "E" clip.
Push the bushing out, leaving the clip on the bushing. Part 42 and 43.

At the rear is a silver cross pin above the safety.
Put a finger over the hole on top and push out the pin. Part 44.
The safety will fall free.
Turn the group over and gently tap it on a table to drop the tiny spring and silver ball out of the hole. Parts 49 and 50. NOTE that the plunger shown is now a silver ball.

Push the trigger FORWARD.
Remove the spring between the top of the trigger and sear. Part 55.

At the front of the group is another bushing with an "E" clip. Part 54.
Push it out.
This releases the shell lifter assembly. Parts 57, 59, 60, 61.
Do NOT attempt to remove the carrier dog, washer or pin from the shell lifter. These are riveted in place and are not removed.

Remove the carrier dog spring and plunger from the group under the carrier dog. Parts 62 63.

Push out the trigger pin and remove the trigger assembly. Part 52 and 45, 46, 47.
Do NOT attempt to remove the right or left trigger connectors from the trigger.

Push out the sear pin from the RIGHT to the left. Part 41.
The Right side is partially blocked by the group, so the pin must go to the LEFT.

Remove the sear. Part 37.

The hammer assembly is retailed by the action lock, and the action lock is riveted in place. Part 56.
DO NOT remove these unless you're replacing the action lock with a new piece.
The action lock is damaged by removal and must be replaced with new parts.
Once fully disassembled, the hammer, mainspring, spring plunger, and the action lock will remain in the group. On new guns there's a washer on the Right side of the group into which the action lock is riveted.

Reassembly:

Make sure the left trigger connector goes ABOVE the top of the action lock extension Part 56.

Reassemble the sear spring Part 55 BEFORE installing the safety. This allows pushing the trigger forward to open the space between the sear and trigger.

When replacing the safety, make sure the red band in on the LEFT side of the group.
Hold it there while you drop in the silver ball and the spring.
Push them down with a small screwdriver while you insert the silver pin TAPERED END FIRST.


Thanks, this should help!