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Thread: Stripping my s/h 0.22 Remington Express Compact

  1. #1
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    Stripping my s/h 0.22 Remington Express Compact

    Right, following my successful tuning of the HW35k with a great deal of assistance from folks on here I decided to tackle a strip down of the s/h Remington Express Compact that I bought on a whim from Guntrader during lockdown last year.

    I’d had a couple of short sessions with it when I got it and although the cocking seemed quite heavy, the twang wasn’t too bad and it seemed quite accurate out to 30yrds.

    Anyway, having done as much as I wanted on the 35 I started stripping the REC down. I wasn’t sure how to remove the trigger mechanism which is integral with the cylinder end plug so I did a search on here and found that shed tuner had done a strip down a few years back and described in detail how to remove the safety pin which is the first thing to do before removing the pins hold the trigger block/spring plug.

    It’s a fiddly job and really needs 3 hands but after about 20mins I’d got it out and used a spring compressor ( sash clamp ) to release the spring.

    There was a fair bit of preload but the most shocking thing was the complete and utter absence of any grease of any sort on all of the moving parts

    The spring was so clean and grease free I had nothing on my hands at all, the cylinder was grease free and dry, as was the piston, ptfe spring guide and metal spring outer guide, there was no sign of any lubrication in the trigger mechanism either - un-bloody-believable !!!

    Further examination of the breech axis pin, cocking shoe, breech pivot washers etc were all completely dry as well.

    I’m finding it hard to believe that Remington or whoever makes them for them assembled it like this and with an unknown history I can only assume a previous owner had been tinkering

    The spring ends were properly collapsed but could do with a bit of smoothing and polishing as could the piston where it rubs on the cylinder.
    I will probably replace the breech seal as it’s quite flattened and although the parachute type piston seal looks ok, it would make sense to replace that as well.

    Im hoping someone may know how many coils the spring should have ( this ones got 28 and the wire gauge is 3mm ), in case this has been swopped out ?
    Hopefully this should be a relatively simple tune up with mainly a good grease up and a bit of polishing being the main things.

    I did run some FAP’s through it before the dismantle and it was averaging 11ftlbs Previously when I first got it I’d set it up with JSB Exacts and it was running around 10.5

    I’ll update this thread as I get it sorted but as with the 35 thread, if anyone’s got any comments, advice or do’s/don’ts I’d be very grateful.

    Cheers,
    Norm

  2. #2
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    Ah, just spotted that you've now started with the fettle and have successfully stripped the beast, Norm. By the sounds of it re surface finishes / lack of lubrication, just some TLC, polishing and sensible lubrication should transform the manners no end, as you have said. What's the guide to spring fit like and does it have a top hat?
    THE BOINGER BASH AT QUIGLEY HOLLOW. MAKING GREAT MEMORIES SINCE 15th JUNE, 2013.
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  3. #3
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    good luck with it norm

  4. #4
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    Most springers are self-destructing the way they come from the factory.
    A proper de-burr, some polishing, adjustments and good lubrication can often improve them a lot without costing anything but your time and a few smears of grease.

    Check the seals for any damage before you reassemble the rifle.
    Tonys implied advice of adding a tophat is a good idea too.
    Too many airguns!

  5. #5
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    Quote Originally Posted by TonyL View Post
    Ah, just spotted that you've now started with the fettle and have successfully stripped the beast, Norm. By the sounds of it re surface finishes / lack of lubrication, just some TLC, polishing and sensible lubrication should transform the manners no end, as you have said. What's the guide to spring fit like and does it have a top hat?
    The inner spring guide is a decent length but is hollow and quite a loose fit in the spring. Where the spring goes into the piston thereís an outer thin metal tube with a thin flange at the piston end. Thereís no top hat and the spring sits on a raised piece which is built into the piston. ( Iíll do a picture !! )
    Iíve got some ptfe rod so I can make a top hat but it wonít be as straight forward as normal because of the outer metal sheath and the shape of the inside end of the piston.



    Quote Originally Posted by evert View Post
    Most springers are self-destructing the way they come from the factory.
    A proper de-burr, some polishing, adjustments and good lubrication can often improve them a lot without costing anything but your time and a few smears of grease.

    Check the seals for any damage before you reassemble the rifle.
    Tonys implied advice of adding a tophat is a good idea too.
    Yes, Iím replacing both the piston seal and the breech seal ( which doesnít seem to be available on the chambers site ? )but checking back through old threads itís a rubber O ring 8.5mm OD with 2.5mm wall thickness, and Iíve got two big boxes of O rings so hopefully I can find the right one.

    I still canít get my head around the complete lack of even the tiniest bit of grease, especially on the spring ! I was looking at it again last night and itís like itís been cleaned in solvent then never degreased

  6. #6
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    Quote Originally Posted by rapidresponse1 View Post
    good luck with it norm
    Thanks

  7. #7
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    look forward in following this thread norm
    email...... stephenbarrow@ntlworld.com
    3 bed static at thornwick bay to let 2016....pm for details

  8. #8
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    Quote Originally Posted by loiner1965 View Post
    look forward in following this thread norm
    Iíll do my best to make it as interesting and as factual as I can, I was amazed at the views and number of threads on the HW one, mind you a lot of them were mine

    It wonít be a review as such just what I encounter whilst doing it, how I sort it and what the testing and outcome is, along with hopefully suggestions and input from anyone else
    As Iíve found out on the other thread, itís very important not to be too blinkered when pellet testing ! ( Oh, and try and remember to thank the correct people for the information you get )

    Iím always willing to learn, I sometimes think that no matter how much you know you can always learn something new and sometimes a different way to do something

  9. #9
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    Thank you,
    Keep going ... I am collecting this information for my files just in case one day I own one of these rifles ....
    Cheers, Phil

  10. #10
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    Hi Norm,

    Quick nip in as I'm at work.

    I think Lyn Lewington (venoman on here and trades as ARC Tuning) will be the UK authority on tuning these? Guessing he possibly does drop in kits if desired?
    THE BOINGER BASH AT QUIGLEY HOLLOW. MAKING GREAT MEMORIES SINCE 15th JUNE, 2013.
    NEXT EVENT :- October 9 & 10, 2021...BOING!!

  11. #11
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    You can go the whole hog with these. Lyn does set back triggers (as they have a bit of a L.O.P.) and moderators for the unusual barrel diameter. This is in addition to the kits.

  12. #12
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    Quote Originally Posted by TonyL View Post
    Hi Norm,

    Quick nip in as I'm at work.

    I think Lyn Lewington (venoman on here and trades as ARC Tuning) will be the UK authority on tuning these? Guessing he possibly does drop in kits if desired?
    Quote Originally Posted by CapitalBee View Post
    You can go the whole hog with these. Lyn does set back triggers (as they have a bit of a L.O.P.) and moderators for the unusual barrel diameter. This is in addition to the kits.
    Thanks for the heads up on that one. Iím going to see what I can do myself at the moment, Iím sure greasing and smoothing should have a significant effect.

    The setback trigger is interesting, I was aware of the L.O.P. When I bought it and itís not a huge issue but would make the shooting more comfortable. Maybe thatís for the future.

  13. #13
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    I'm sure you're right with this approach. It's nice to keep the spend low, especially on a budget priced gun. Going by your description of internal finish and lubrication, I'm sure an "old-fashioned" polish and tune will yield a positive transformation. And, as evert says, once hand finished and lovingly reassembled, you'll be sure in the knowledge that all's well inside.. If you can find a way of making up a top hat, I'm sure that will be most beneficial, too.
    THE BOINGER BASH AT QUIGLEY HOLLOW. MAKING GREAT MEMORIES SINCE 15th JUNE, 2013.
    NEXT EVENT :- October 9 & 10, 2021...BOING!!

  14. #14
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    Quote Originally Posted by TonyL View Post
    I'm sure you're right with this approach. It's nice to keep the spend low, especially on a budget priced gun. Going by your description of internal finish and lubrication, I'm sure an "old-fashioned" polish and tune will yield a positive transformation. And, as evert says, once hand finished and lovingly reassembled, you'll be sure in the knowledge that all's well inside.. If you can find a way of making up a top hat, I'm sure that will be most beneficial, too.
    In its standard form the end of the spring in the piston is centralised by a raised section which fits inside the end of the spring and the spring Ďturnsí on the outside flange. I say Ďturnsí, even having polished the end up a bit itís still quite graunchy to turn. One of the PTFE (?) preload washes from my HW tinbum kit is a perfect match to the outside diameter of the spring, fits in the piston sleeve and even has the right ID to fit over the spring locator in the piston ( how lucky/weird is that )

    My plan would be to make a top hat with the bare minimum thickness and length, to go up against the tinbum washer, however even then I reckon itíll add about 5mm of preload in total ! This may make it harder to cock so ultimately I might then have to remove 1/2 a coil maybe ??

    I did have a look at the breech seal this afternoon and I think I might have mistakenly said it was 8.5 OD by 2.5, it should of course be 8.5 ID
    Typically having gone through a large O ring kit and my odds and ends ones I donít have one that will fit. I know I can order them from Ďthatí place but for the time being Iíve filed down the OD of a 0.2mm washer I found and put that behind the existing seal to make it slightly more proud of the breech.

    I have a new piston seal on the way as well.

    I decided as I couldnít do too much today that Iíd take a load of measurements of the internals and list them, as they may be of use to someone else. Please bear in mind these are for my gun and have been measured with a digital calliper ( zero checked after each measurement )
    Iíve put Ďplasticí for the inner spring guide and piston seal as Iím not sure what theyíre made of and didnít want to look a tit quoting something theyíre not

    Oh if anyone knows how to date these guns, mines got 140XEX 053184 on the Cylinder

    Norm

    Cylinder.

    ID - 28mm
    Wall thickness 2.0mm
    Port 4mm at front tapered to 3.5mm inside ( measured with drills as I had no other way )
    Port depth 20mm
    Sloping breech with sprung ball lockup.

    Piston.

    Seal is Ďplasticí parachute style 28.2mm max diameter x 4.75mm depth - bear in mind this is the old one !
    Piston head diameter- 27.5mm
    Piston is turned steel with machined slot, not folded steel like some cheap ones.
    Weight inc seal - 269g
    Total length to skirt ( inc seal ) - 131mm
    Head to main body 11.9mm
    Cocking rod from skirt to end - 32mm x 10mm diameter
    Internal spring shoulder is 3mm with further stepped 3mm reduction which fits inside end of spring.


    Outer spring guide/piston sleeve

    Material - steel
    Length - 106mm ( when in piston it fits level with skirt )
    OD - 23.0 - 23.13mm
    ID - 21.6 - 21.9mm
    Hole diameter at piston flange end - 15.65mm

    Inner spring Guide.

    Material Ďplasticí
    Length - 111mm inc stepped out head which fits into recess in trigger block.
    OD - 13.9 - 14.0mm
    ID - 10.5mm ( average )
    Metal washer between end of spring and spring guide, 26.75mm OD, 16mm ID, 1.03mm thick and appears to be blued ?

    Spring.

    Round section wire gauge 3.0 - 3.13mm
    OD - 20.5mm
    ID - 14.3mm
    Length - 234mm
    Coils - 28

  15. #15
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    Just to add that contrary to my earlier cursory examination, the inner and outer spring guides are actually quite a decent fit and not too sloppy. Which is probably why it didnít twang too much despite being completely devoid of lubrication

    Norm

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