July 2, 2023
Lithgow Arms LA101 Trigger Spring Installation
- Clear your rifle, ensure the chamber, magazine and bolt face is free of all ammunition Failure to do so may result in Death or serious injury.
- Prepare your work area, clean and tidy an appropriate work surface to avoid loss or damage of small parts.
- Gather required tooling, the required tooling will vary from firearm to firearm and your personal preference however you may require.
- Bits and bit driver, suitable for removing your action screws.
- Pin punch, sized appropriately for removing sear and trigger pins as required.
- Hammer
- Small common screw driver.
- Needle nose pliers.
- Circlip pliers.
- Allen keys.
- Safety Glasses.
- Loctite 222, or nail polish maybe required for some firearms.
Note. During this procedure take care not to lose any small parts, pins bolts screws etc. Place them in a suitable container such as a zip-lock bag or parts bowl.
- Remove the bolt and magazine from your rifle, if fitted and set them aside.
- Remove you barrel and action from the stock, by unfastening the action screws and set your stock aside.
- Remove your trigger mechanism from the barreled action, by unfastening the Allen bolt and set the barreled action aside.
- Remove the safety lever return spring, (item “A”) with needle nose piers take care during this step not to let the spring fly away.
- Remove the circlip, (item “B”).
- Remove safety lever, from trigger body.
- Remove Trigger retaining pin, (item “C”) carefully tap out with pin punch and hammer. You may need to position trigger mechanism on a small block of wood with hole drilled to except the pin or on the edge of a bench. Take care not to lose the pin!
- Loosen grub screw, (item “E”).
- Remove Safety Pin, (item “D”)
- Remove trigger, from trigger body.
- Remove trigger spring and bolt release plunger, (item “F”) from trigger body.
- Replace trigger spring, with HVHA spring provided.
- Assemble in reverse order, it is a good idea to use thread locker such as 222 Loctite on the grub screw and on the heads of the pins to prevent them from backing out. Though I prefer to use Nail polish instead as it provides ample locking and is easy to remove with acetone in the future if required.
- The last step is a function test, to make sure your rifle is in good working order. Place weapon on safe, pull the trigger. Then place on fire and feel the improvement.
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