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Adjusting a MK V trigger ?

 
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  #1  
Old 02-10-2008, 11:21 PM
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Join Date: Jun 2004
Location: Texas
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Adjusting a MK V trigger ?

Anybody have instructions for adjusting Mk V triggers?

Thanks, Tom
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  #2  
Old 02-11-2008, 04:00 PM
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Join Date: Dec 2004
Posts: 139
Hi Tom,

This is from memory so keep that in mind.
The Mark 5 has 2 trigger adjustments. Spring pressure on the trigger (the one you probably want to adjust) which is located on the bottom side of the rifle, right next to the trigger. You access it from inside the trigger guard. Screw it in for increased pressure, and turn it out for reducing pressure.

The other adjustment is for Sear engagment. This one is located at the top of the rifle. You need to pull your bolt out and remove your scope (or grind down a special length allen wrench to access the screw without scope removal). I believe its, turn in to decrease sear engagment and turn out to increase engagment.

That is how to do it in a nutshell. However, I find that the spring provided on the trigger is too damn stiff and you can't get less than about 3lbs of pressure. If you have enough time available you can order a lighter spring and change the pressure correctly. If you like me and can't wait 2 weeks for a new part to arrive, then you would remove the existing spring and grind it down just a little bit. (make it shorter so it is not compressing with as much force). You may think that backing out the screw would reduce all force on the spring, but that is false. The design is such that the spring is captivated inside the trigger mechanism and even if you remove the tension screw, the spring is still compressed to a minimum value of about 3lbs.

Note that you have to completely remove the trigger from the rifle and dissassemble the entire trigger to get the spring out! What a pain that is. But, after taking everything apart you will know exactly how the mechanism works.

I have groung my spring down so that now I can adjust the trigger pull from about 6 oz. to 2 lbs.

Just be careful you don't grind too much of the spring down, then you will have to purchase a new spring.

Kind regards,
Vic
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  #3  
Old 02-11-2008, 11:51 PM
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Vic, there is nothing like experience. Thanks very much, Tom
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  #4  
Old 02-18-2008, 09:05 PM
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Join Date: Dec 2001
Location: Pennsylvania
Posts: 230
I adjusted mine per the instructions below but wasn't happy with it until I changed the spring as Vic said. While i was in there I found a burr/rough area on the sear that wasn't helping things. With the spring change and a bit of honing mine is quite nice now at 1.5 lb.

From Weatherby's website FAQ:

12. How do I adjust the trigger pull on my Mark V rifle?

A. The Mark V trigger assembly has two socket cap (Allen-type) adjusting screws. The socket cap screw on the bottom of the trigger assembly adjusts for weight and trigger pull, and is for your use. The socket cap screw on the top of the trigger assembly adjusts sear engagement (“creep”), and is for use by Weatherby factory and Authorized Service Center personnel only.

WARNING!! Do not attempt to adjust sear engagement, make any adjustments other than as described below, or modify the trigger assembly in any way. Improper adjustment or modification of any firearm trigger assembly can result in the firearm discharging prematurely due to a “hair trigger,” minor bumps or movement, possibly resulting in serious injury or death. The trigger assembly has been set at the factory for weight of trigger pull appropriate for most shooters. If you require a heavier or lighter weight of trigger pull, adjust as follows:



1. Unload the rifle as follows:

Keep the muzzle of the rifle pointed in a safe direction and your fingers out of the trigger guard and away from the trigger at all times while unloading the rifle.


Move the safety lever to the forward position to unlock the bolt.

Raise the bolt handle and pull the bolt to the rear to extract and eject any chambered cartridge.

Place one hand under the floorplate to catch cartridges to be removed from the magazine.

With your free hand, press the floorplate release to open the floorplate and remove any cartridges from the magazine.

Reposition the magazine follower inside the magazine and close the floorplate.

Visually double check the chamber and the magazine to make sure there are no cartridges remaining in the rifle.



Removal of stock is not necessary. The socket cap adjusting screw is accessible through the opening in the trigger guard, just forward of the trigger.


To increase weight of trigger pull, with a hex key (Allen-type) wrench of proper size, turn the bottom socket cap screw clockwise (when viewed from the bottom) until desired weight of trigger pull is established.

To decrease weight of trigger pull, with a hex key of proper size, turn the bottom socket cap screw counter-clockwise (when viewed from the bottom) until desired weight of trigger pull is established.

NOTE: For safety reasons, weight of trigger pull will not be adjusted below
three pounds. To determine trigger weight requires use of a trigger scale.


After adjusting the trigger to the desired weight, engage the safety and pull the trigger to its limit. Release it slowly to ensure that it returns to the forward position. If the trigger does not return to its position, you have adjusted the trigger pull too lightly.
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  #5  
Old 02-19-2008, 07:25 AM
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Join Date: Feb 2005
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Any thoughts on where I would readily be able to pick up a new spring? I may try to grind mine down but that may result in needing a new spring anyway.
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  #6  
Old 02-20-2008, 01:36 AM
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Join Date: Dec 2001
Location: Pennsylvania
Posts: 230
Wunderdog,
Ebay Item number: 330213256986

$11 including shipping

From erniethegunsmith

He has a bunch of springs.
Shummy
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