TX200 - Mk2 piston into a Mk3?

[Weasle]

if it's not the length of the guides it may well be the centralisation of the rod in the piston - is it centred correctly ? Also is the rear guide "brim" OD the full size of the main tube of the gun, thereby preventing it from moving off centre ? Also look at the trigger block - does the lead into the hole in the trigger block through which the piston rod passes show any signs of being hit / metal contact ?

The Brim OD of the guide is a V snug fit in the main tube - in fact it was oversized as supplied, and I reduced the Dia to give me a snug fit - thinking I didn't want any lateral movement.

I haven't noticed any witness marks on the trigger block - however I will re-strip and investigate.

Many thanks

Steve

[robs5230]

The Brim OD of the guide is a V snug fit in the main tube - in fact it was oversized as supplied, and I reduced the Dia to give me a snug fit - thinking I didn't want any lateral movement.

I haven't noticed any witness marks on the trigger block - however I will re-strip and investigate.

Many thanks

Steve

Where did you buy the mk2 spec spring ? Is it a standard mk2 spring or an after market one (Titan or similar) ?

I think its something simple like being coil bound.

When its in bits, also worth checking for any wear / damage to the cocking shoe.

[Weasle]

Where did you buy the mk2 spec spring ? Is it a standard mk2 spring or an after market one (Titan or similar) ?

I think its something simple like being coil bound.

When its in bits, also worth checking for any wear / damage to the cocking shoe.

It was bought as a standard Mk2 spring from Mr Knibbs.

Ill be doing a further stripdown over the weekend.

Many thanks for all of the advise/comments so far.

Cheers

Steve

[Weasle]

Just re stripped the TX and removed a slip washer that I had put under the top hat......It now cocks.

With a Mk 3 V-Mach spring it makes 8.5 f lbs, with the Mk2 Knibbs spring, its at 11.2 f lbs.

New seal, so will put a tin thru it and recheck.

Many Thanks for all of your comments...shame I made a school boy error

Cheers

Steve

[NickG]

Just re stripped the TX and removed a slip washer that I had put under the top hat......It now cocks.

With a Mk 3 V-Mach spring it makes 8.5 f lbs, with the Mk2 Knibbs spring, its at 11.2 f lbs.

New seal, so will put a tin thru it and recheck.

Many Thanks for all of your comments...shame I made a school boy error

Cheers

Steve

If it was under the top hat /piston weight then it was coil binding, unusual in the mk2 as the stroke is a lot shorter than the mk 3, if it was under the spring guide then it was the spring guide base not entering the piston bore .

[Weasle]

If it was under the top hat /piston weight then it was coil binding, unusual in the mk2 as the stroke is a lot shorter than the mk 3, if it was under the spring guide then it was the spring guide base not entering the piston bore .

It was under the top hat - about a 3mm slip washer - now time for testing and getting the seal bedded in.

Many thanks for your assistance.

Steve