HW77 Mk1 lever catc...
 

HW77 Mk1 lever catch  

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functor
(@functor)
Joined: 1 year ago
Posts: 40
2018-08-28 12:36:53  

I have a mk 1, HW77 ( I think that's what the Brits call them) and the underlever latch, which is a simple spring and ball affair, took off without a warning. I managed to find the ball after a painful half hour's search in the grass, but the spring, I am afraid, is lost.

I can buy the spring from UK airgun stores, but seems a bit pointless to order a spring from across the Atlantic. Is there a source here in the U.S? (I searched Pyramyd and they don't have it listed)

I had never looked at the latch end closely until this incident. I am not sure how I can keep the ball in. I can push it back in in with little effort and I am concerned that it will pop out again. How was the ball secured in the first place? And what can I do to avoid it exploding out again?

Thanks,

Roy

 


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sonnysan
(@sonnysan)
Joined: 1 year ago
Posts: 145
2018-08-28 13:50:04  

In today's market, you can easily buy these kinds of parts from a home depot or lowe's.  If you have a local fastenal, I guarantee they will have a near exact or exact replacement. 

This happened to me after assembling an R-1 months ago.  The included hex screws were too short once I placed the action in the stock.  Undeterred, I went to Home Depot to see what was available.  Lo and behold they had the exact same screws, only in different lengths.  Think it cost me a little under $2.  Additionally, I bought the correct washers that did not come with the original screws.  Now I can say the gun is better than new - whatever that means.

https://www.gunspares.co.uk/products/24776/HW77/

 

 


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airmojo
(@airmojo)
Joined: 1 year ago
Posts: 138
2018-08-28 13:51:41  

Don't really know the answer... I was looking at a schematic diagram on Chambers website to see it.

I have an HW77 .20 carbine... looks like mine is a MK2 according to the schematic.

I bet the ball bearing on yours is press fitted into the end... once the ball and spring is inserted, the end may need to be squeezed to retain them.

I wonder if it can be updated to a MK2 or Mk3 lever retainer ?

I'm sure someone will know for sure... or you might have to contact an expert like Jim Maccari, or Tim McMurray (is he still around?).

Ken H in OH -- Life is One Hole After Another...


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functor
(@functor)
Joined: 1 year ago
Posts: 40
2018-08-28 15:47:51  

That's a good idea. I will measure the hole in which the spring fits and then try to find something similar. Seems as long as sufficient spring pressure is there to hold the ball, it should do the job without needing to be too precise. 

Thanks,

Roy


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functor
(@functor)
Joined: 1 year ago
Posts: 40
2018-08-28 15:54:29  

I too thought of replacing the front sight assembly to a mark 2/3 version which has the added benefit that I can put a globe sight on. Then I looked online and saw one youtube video where this guy cheerfully advised one to be "brave" in hammering out the front sight from the barrel. I don't think I'm that brave! 

I am not sure how to squeeze the end in: some online commentators said "dimple" it-- whatever that means. If the replacement pops out, I'll have it sent to someone and have it serviced/ tuned in the process. After 35 years and thousands of rounds the gun deserves a repair and tune. 

Roy


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marflow
(@marflow)
Joined: 1 year ago
Posts: 588
2018-08-28 17:11:02  

well I have been searching around and the front sight comes off with heat and a wooden block to tap it off and that is nothing new

if the ball will just roll out it would have to come of so it could be restaked in, so of it comes

but was looking for parts and if you look at the bottom of this page you will find a mk3 unit at I would say a great price item v93, is it complete I don't know

 

http://www.proteksupplies.co.uk/weihrauch-parts.html

the factory part number on your missing spring in 9017 and in any case HW parts are pricey

so in the long run you or someone will have to take the front off to fix the problem

wish I had more to offer

take care

mike

Mike


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functor
(@functor)
Joined: 1 year ago
Posts: 40
2018-08-28 23:02:36  

Thanks very much for the link. I will try to buy a spring locally and if that doesn't work I guess I'll order it from U.K. I read up a bit on removing the front sight-lever catch assembly-- it's quite beyond my skills to heat up the assembly and remove it. Also seems a bit sacrilegious to treat a mk 1 spring airgun legend quite that roughly! 

Thanks again for doing all the digging up online. Appreciate it.

Best,

Roy


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marflow
(@marflow)
Joined: 1 year ago
Posts: 588
2018-08-29 15:10:34  

well if you send the gun to someone there going to heat it up and use a block of wood and pound it off

sometimes that is the way to remove parts, I can not find a close up picture of the part area, so I'm guessing it is staked in some way and that staking has failed allowing the ball and spring to fall, fly, out

you sure can't stake that area with it on the gun and how the factory did this is not know by me  so it's up to you but the spring is the leased of your problems, keeping them in place is  

Mike


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bf1956
(@bf1956)
Joined: 1 year ago
Posts: 71
2018-08-29 15:24:29  

To dimple it is by taking a small auto center punch and dimple nice and easy and evenly all a round the latch retaining drum.


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marflow
(@marflow)
Joined: 1 year ago
Posts: 588
2018-08-30 01:40:31  

how was the setup manufactured in the first place, I don't own a 77 and can't find any close up picture

was the spring and ball installed and then dimpled or staked or was it manufactured with it being undersized and everything loaded from the front

yes I agree and auto center punch might be the easy fix, zip tie the ball back and you could get 4 dimples in and add 2 more with the tie removed but the spring better be of the right strength

 

Mike


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functor
(@functor)
Joined: 1 year ago
Posts: 40
2018-08-30 10:19:20  

I have to admit my knowledge of matters technical is rather limited, which is just a fancy way of saying, I have no idea! From what I could gather the spring and ball must have been inserted from the end where the lever latches-- after all they popped out through that end and must have been of the same diameter-- and then somehow they were kept it. The hole at the other other end( pening towards the where the barrel points) is too small in diameter for inserting the ball or spring. I wonder why that hole is even there.

Let me see if I can take a few photos later today and post. 


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