Idiots guide to classic airgun strips (pt 1)

[ggggr]

The plastic rearsights on these are fragile so Id just be careful rather than remove it. Undo 2 front stock screws and one in front of trigger and remove action from stock. This rear screw can strip and Ive tapped them out to 1ba when they have, Ive heard of people putting a nut on the inside of the trigger housing but have not tried this. Sometimes this screw can push on the sear and stop the rifle from cocking. A washer under the head of the screw should cure this although Im sure you could grind away the underside of the sear. With action out of stock you can ondo cam and slide out barrel.(suggest you do this with breech open or you wont be able to get to barrel plunger later) You can take circlip off cam and remove cam to grease up. Remove roll pin in cocking arm and remove arm. Depress barrel plunger and remove pivot pin and then plunger and spring to grease up. Flick the two circlips off the trigger pins (noting how trigger goes) and remove pins and then trigger,trigger spring. safety catch and sear and sear spring. I find with hawks its easier to place encap on piece of wood and push down on the breech end and remove cylinder end pin. GO TO PT 2

[ggggr]

Its worth noting that this hole in the cylinder can stretch when big springs have been fitted. Im sure there are people on here who can weld them up and redrill but just dont fit a powerful spring. Meteor springs seem a better fit in hawks than hawk spring Ive tried recently and the Diana 25 spring remains a soft plinkers option. Release pressure on cylinder and end cap and mainspring should come out. Ease piston out. These had a ptfe washer rivetted on (Nibbs sells them ) But I prefer a leather one held by a screw and nut. SEE THREAD "hawk mk 1 info" post 13 by DCL DAVE. Thats the sort of thing I did. Lube up and put back together. Piston in and then mainspring and push down on cylinder the same as in stripdown to replace end cap and pin. Place sear and searspring on safety catch and slide into housing,locate,put pin in and circlip on. Fit trigger spring onto trigger with long leg behind trigger and locate,pin and circlip. (if your cylinder pin hole is worn and cap is a little off the cylinder, you may have to use a piece of shim steel to cover the gap to stop trigger spring going into it whilst you are replacing it. Replace cam in breech and replace circlip. Replace barrel and secure. GO TO NEXT POST

[ggggr]

Place breech in jaws and locate pivot pin in right jaw and line up with pivot hole. Push it in just enough to locate and then put plunger spring and plunger into their hole and depress and then push pin right through. Replace cocking arm and roll pin. Fit action in stock and tighten screws.
The safety catch on Webleys are not great. The mk 1 and some mk2,s are automatic but if you cut the bit of the safety catch off at the front (the bit the cocking arm pushes) then they become manual. On the mk 1 there is a shelf on the side of the safety catch that stops the sear from moving. On the mk 2 its at the back an stops the trigger from moving but these (mk2) aseem more likely to break off. The Hawk mk3 has the "wrap around" catch where the rear of the trigger cant move upwards because it hits the wrap around. NEXT THE HAWK MK 2 AND HAWK MK 3.

[ggggr]

This strip also applies to the vulan except it has a different piston head set up, "a ptfe set up and a rubber buffer" according to Phil Bulmer, which may be changed for a stingray set up on some vulcans,again according to Phil Bulmer.
Read previous post about problems with fitting big mainsprings and the gun not cocking. A quick strip guide can be found on thread "Webley hawk disassembley" 7/o7/08, post 3.
Remove sights. Remove front two stock screws and one in front of trigger guard. Remove action from stock. Remove cocking arm pivot roll pin and then remove cocking arm. Break barrel and depress barrel plunger and remove pivot pin. Release pressure and remove plunger and spring. Remove breech block and barrel. IF YOU ARE GOING TO CHANGE BREECH SEAL WASHER ON CYLINDER IT IS ALWAYS EASIER TO DO IT WITH BARREL OFF---ALSO APPLIES TO PISTOLS. BREECH SEAL SHOULD HAVE ROUNDED SIDE FACING OUT. Undo trigger adjusting allen screw on top of cylinder end block to take pressure off trigger spring. GO TO NEXT POST

[ggggr]

Damn--lost a post. Anyhow,remove trigger pin circlips and remove the trigger pin and remove trigger and its spring. Remove other two trigger pins and pull out safety catch, sear and sear spring. Place cylinder, end cap down, on a block of wood, with the flat of the cap on the wood and the pointy bit overhanging. Push down and remove pin and release pressure. End cap, spring and piston can be withdrawn. The ptfe piston rings can be replaced with "o" rings but I dont know the size. I replaced 1 ring on a rough gun I had to get it going. clean and lube gun and put back together. Put piston, spring and endcap in cylinder (as with removal) and push on cylinder and replace pin. The breech block can be placed in jaws and located with pivot pin. Depress plunger and spring and push pin home. Replace cocking arm and pivot roll pin. Place sear spring onto sear and sear onto safety catch and put into trigger housing and line up with pins. Push the front two pins through and replace circlips. push trigger spring into end cap and push trigger up until it lines up and push that pin through and secure with circlip. Tighten the adjuster screw on the end cap. Go to next post.

[ggggr]

The back of the sear spring can be hooked over the top of the sear with a small screwdriver or two. Replace the action in the stock replace stock screws and replace sights.

[ggggr]

I was hoping someone would put up the Webley sheets but they aint yet. The Osprey is more or less a sidelever Hawk mk3 and the trigger info above applies. Remove sights and the 2 stock screws, one at fore end of stock and one in front of trigger guard. Remove action and watch out for lump of metal in stock that helps locate rifle. Unscrew loading tap lever screw and remove spring and push out tap. You can change the seal if you want. Unscew trigger adjuster on top of endcap and remove circlips from trigger pins. Remove trigger pin and trigger and its spring. Remove other two pins and slide out safety, sear and sear spring.Take circlip off the ratchet and remove pin,ratchet and spacer (noting how it goes). Unscrew the pawl spring screw and remove spring and pawl. Knock out cocking arm pin and remove cocking arm. Knock out sidelever pin and remove sidelever and spring (noting how it goes) .Undo the allen screw in the end cap that secures the cylinder end pin. Push down on cylinder end plug and remove the cylinder pin. Release pressure and the end plug should come out, followed by mainspring and piston. (I had a problem with the endcap being really tight and it was a case of pointing it into some rap and waiting for iy to move and then knocking it out with a piece of wood) in this case ease it before you replace it. GO TO NEXT POST.

[Jamie Norton]

Use a digital camera to take pics of the components (especially trigger assembly) BEFORE you dismantle them. Referring to the pics on reassembly could save you headaches

[Phil Russell]

Some notes on stripping and rebuilding the WEbley Victor and Vulcan Hopefully I have not forgotten anything. If so, just put me right or ask me.

WEBLEY VULCAN / VICTOR STRIP and REBUILD

The Webley Vulcan and Victor are basically the same rifle. The MK1 Vulcan had the same barrel length as the Victor (17.125”) but later Vulcan models had 19.25” barrels. The Vulcan has a safety catch and an adjustable trigger; the Victor does not. The Vulcan stock is longer than the Victor. Advertised power for the Victor was 720fps when new (pellet not specified).

These notes on striping and rebuilding the rifles do not include advice on tuning. Where they include reference to the safety catch or trigger adjustment, the notes apply to the Vulcan only; ignore them for the Victor.

Stripping:
Remove the stock: two screws in the forend and two screws in the trigger guard. I recommend removing both foresight and rear sight to prevent accidental damage. The rear sight can be removed as a complete assembly by undoing the two 4BA screws in the top.

To remove the spring and spring guide assembly: it is necessary to remove the trigger. This is not difficult but it pays to have a good look at the assembly before starting, or even take a photo to aid reassembly. It is only necessary to remove the actual trigger, not the complete trigger and sear assembly. To do this, remove the circlip and then the pin that acts as a pivot for the trigger and remove the trigger and a coiled trigger spring that fits into the end block.

To remove end block and spring assembly: Either hold the gun upright and press down on the end block while removing the pin that holds the end block to the action or use a spring compressor or vice to hold everything firm while the pin is removed. The preload is not excessive but is present nonetheless. With the end plug removed, the spring and spring guide can be removed.

To remove the piston assembly: it is necessary to remove the trigger sear and the cocking lever. To do this, remove the remaining two pins in the trigger assembly and remove the safety slide (for the Vulcan) and the sear and its spring (Vulcan and Victor). Be sure to note how the safety slide fits on the sear. Draw or photograph as appropriate.
To remove the cocking lever use a 5mm drift to remove the pin that holds the cocking lever to the breech. On some rifles it can be convenient to remove the complete barrel and cocking lever assembly by removing the pin or bolt that the breech pivots on. Unless you want to get at the barrel fixing / lock-up plunger, do not remove this pin on the Victor or Vulcan as if you do, the barrel plunger will be released. It is acted upon by a very firm spring and refitting it can be a bit awkward. By removing the pin from the cocking lever, the lever can be removed but leaves the barrel assembly in place. Once the lever is removed, the piston can be removed. The piston seal is in two parts, a seal and a cushion washer. Clean or replace as necessary. If the seal needs replacing, it is advised to cut the old seal away with a sharp knife, but the cushion washer simply lifts off.

Clean or replace parts as required.

Rebuilding:
Generally, rebuild is a reversal of the strip procedure.
A new cushion washer will slide on. To fit a new seal, place the seal against the retaining flange on the piston and press firmly with both thumbs until the seal clicks into place. A piston sleeve can be added if you wish. With the piston cleaned, lubricate as appropriate.

Lubricate the inner surface of the cylinder and refit the piston assembly, making sure the slot in the piston lines up with the slot in the cylinder. Refit the cocking lever into the cylinder/piston slot and refit the lever and its pivot pin in the breech.

The Webley Manual says to replace the trigger sear before replacing the spring and guide and end plug. In practice I have always replaced the spring, guide and end plug first.

Refit the spring and spring guide.
Refit the cylinder end plug and secure with its pin.

It is now time to refit the trigger.
Victor: I can do no better than give instructions from the Webley Manual: locate the sear spring onto the RH side of the sear with the cranked end through the small hole in the sear and its central hole aligned with the sear fulcrum pin hole. Feed this assembly into its correct position in the trigger housing, lining up the fulcrum hole in the sear with the relevant hole in the housing. Insert the fulcrum pin through the housing and sear from the left side and fit the circlip.
Vulcan: As above except that you need to position the safety slide on the sear as you feed it into position.
Fit the front fulcrum pin (nearest the barrel) making sure it passes through the forked end of the safety slide (Vulcan only).

Replace the trigger spring in the body end plug. Replace the trigger, holding the long leg of the sear spring out of the way towards the cylinder. Refit trigger pivot fulcrum pin and let the long leg of the sear spring rest against the fulcrum pin.

That should be job done. Refit the sights and reassemble into the stock. Test that the trigger sears engage and that the safety works. The safety can only be set (then unset) when the rifle is cocked. It is not set automatically on cocking.

Cheers, Phil

[david9d]

I have a copy of the handbook for the Osprey, which besides general advise has a good description of stripping and re-building. .
I have it available in PDF and in JPEG formats, but I don't know how to put it up on here.
Can anyone help please ?

David

[david9d]

Oh well, if it can't be put up on here directly I am willing to email a PDF copy to anyone who requests it through my email address - see my profile.
David

I have a copy of the handbook for the Osprey, which besides general advise has a good description of stripping and re-building. .
I have it available in PDF and in JPEG formats, but I don't know how to put it up on here.
Can anyone help please ?

David

[ggggr]

I got a dog rough one to play with so where Ive had to modify and improvise a bit. I stripped this right down because the stock was cracked and loose.
Undo and remove 2 screws on metal butt plate. Use a socket to undo the nut in the stock (a 9/16 AF fitted the one in mine) and the stock should slide off.Undo the cocking arm pivot screw and remove cocking arm. (on mine the thread was gone in the breech block so I tapped it to 5mm and made up a locknut out of round bar,which I cut a slot in and blued). Undo the locknut on the trigger adjusting screw and remove the screw. Remove the 2 trigger guard screws. You should be able to unhook the trigger spring now but mine was a bugger because of gunge. Unscrew the trigger pivot screw and remove trigger.Unscrew barrel pivot and remove barrel. You can remove small screw on side of breech if you need to get to plunger and its spring. On mine the cylinder end cap was tight so I had to get it into a vice to start to unscrew it from cylinder.Once unscrewed you should be able to remove mainspring and piston. (mine was so gunged the piston washer was stuck to the end of the cylinder. If the piston washer needs removing you will have to drill out the locking pin that holds the piston washer screw (look closely and you should see it).

[ggggr]

I made up a piston washer for this (and cursed sending one I had to someone a few months back). Everything is cleaned and lubed ready to go back together and assuming you have sorted the barrel plunger and spring and replaced it in breech. The breech washer was made up of very thin leather and soaked in almond oil and replaced. Fit piston washer to piston and replace in cylinder (someone on here suggested doing it dry and lubing after---I can see the point because of the difficulty getting past the threaded bit of the cylinder). Replace mainspring and cylinder end cap. Refit barrel and replace barrel pivot (I made up a locknut for this as well). Replace cocking arm and its pivot. Replace stock and nip up nut. Replace butt plate and 2 screws. Locate trigger spring and push trigger into housing and locate pivot screw. Replace trigger guard and then the trigger adjusting screw and locknut. If the gun wont cock becuase it feels as though the piston is hitting the trigger, you need to wind the screw in more. If it wont hold the piston then wind it out.
stripped another of these and had a problem with the barrel plunger/barrel lock up. The barrel was drooping a bit. If you take the barrel plunger out of the breech block and file the rear of the cut out, this usually lets the plunger come out a bit more and lifts the barrel up. On this one I noticed some movement on the cylinder and investigated. There is a non sprung plunger in the end of the cylinder. I removed this and put a filed down shake proof washer behind it as a shim. This cured the barrel droop.

[Phil Russell]

I forgot I had written these notes: they may help. All is pretty straightforward except getting the trigger / safety back together which is a bit of a fiddle until you get the knack. All is explained here:

CROSMAN 766 STRIP

Taking apart.
Remove barrel band (2 halves, single small screw goes though band)

Remove barrel band ends: plastic, lifts away.

Knock out the pin holding the pump lever to the pump tube.

Remove pump lever with pump attached.

Remove barrel: hex key on top of action.

With the breech block on its side, screws uppermost, stock to the right, remove the 4 screws. Keep top plate in position while doing this.

Gently prise the top plate off the bottom plate. Take care the pump handle plastic grip holder, black plastic sprung laden bit on left, does not ping out as you release the top plate. Top plate may come away with the trigger and safety catch or may leave trigger and safety in the bottom plate. Either way the trigger safety spring may become detached from its location on the safety. Do not worry. Remove trigger, spring and trigger pin.

Note position of trigger sear components.

Lift sear away, taking care not to lose the large spring that acts on the sear bar. Lift off the long spring and plastic peg that acts as the BB follower from its channel.

The valve housing is held by a screw to the left of the valve housing. Before releasing this, note the brass component at the top of the valve body towards the left. This has a small spring over it. Release and remove the screw holding the valve housing but hold the housing in position. Now gently lift the housing away to the right, catching the small spring on the brass piece and also noting that the striker piece and a black plastic end body will be released under spring pressure on the right hand side. Just go slowly and this component will not be forcibly ejected. The brass valve body will slide out of the air cylinder. If it is an easy, loose slide then inspect the O ring as it will most likely be worn.

If needed, replace O ring.

Clean all parts, especially the air cylinder.

I have not dismantled the valve.

Rebuilding
Reversal of above but these tricks may help.

Assemble valve body and housing into place in the air cylinder. Have the brass component in place but do not fit spring yet. Take care that the striker and its spring and the black plastic end cap are located correctly. Replace the screw to hold the valve housing.

Carefully replace the small spring over the brass component. There is just enough room to wiggle this over the component; it stays in place against the bottom plate.

Refit trigger sears in place and slip the sear spring into place.

Refit the pump handle retaining spring and catch ... take care it has a habit of falling out.

Refit the trigger and its rod with the safety spring under the trigger and the hooked end pointing up. At this stage I found it best to hook a small bit of thin wire over the long arm of the spring and feed it towards the trigger such that when the top plate is replaced it protrudes out of the trigger guard.

Replace top plate: a bit fiddly to do this and keep pump handle spring in place but persevere.

When located, pull on the bit of wire to pull the safety spring long leg downwards ... look through the hole for the safety catch to see if it has cleared the hole. When it has, feed the safety catch back into place and release the spring. Pull the bit of wire out.

Replace 4 plate screws.

Refit barrel, and pump etc.

Job done.

Cheers, Phil

[ggggr]

I got this the other day and thought I would do a strip down. Remove rearsight if you want. Remove the front and rear stock screws ,the trigger guard screw and the trigger guard and lift the action from the stock. To be able to remove the barrel and cocking arm, you will have to drift out the small pin in the housing the cocking arm passes through. Undo the barrel pivot lock nut and undo the pivot bolt and remove the barrel. If the breech seal needs changing then do it now. Remove the endcap from the cylinder. Unhook the trigger spring off the tang on the cylinder/trigger sleeve. Knock out the trigger pivot pin (front one of the two pins) and remove the trigger. Using the bit of forked tube tool ( mentioned early on in the guides) or similar keep pressure on the sleeve and knock out the 2nd pin. (I managed to hold the pressure with just my bare hands but use the tool just in case). Release pressure and the tube should come out,followed by a washer and the spring guide. Remove the spring and the piston. Clean everything up and lube. The example I got had no piston seal. It think it should be a synthetic seal held on by a metric screw (3mm I think). I made up a leather one to replace it. Replace the piston,mainspring,guide,washer and sleeve and compress with the tool to enable you to get the rear pin through the cylinder. Go to pt 2