Tau 7 co2 match pistol

[zooma]

I should not have laughed.

My son was shooting a TAU 7 last night ( and getting good scores too) - but the pistol was hissing from the breech all night and using plenty of gas, so it looks like we have to take a look inside and inspect the suspect valve!

The previous owner never used the gold coloured CO2 containers - only the cheapest possible types - and I am guesing the lack of any suitable lubricant has accelerated the valve seal wear?

Others TAU 7 owners that use the gold coloured cylinders from Walther/RWS etc or add a small blob of Pelgun oil to the tip of the cylinder before piercing seem to have less seal problems, so when we repair the leak/seal/valve I think we will use the gold cylinders from now onwards, or a spot of the new type of red Pelgun oil on the neck of the cheaper silver types.

[hwtyger]

I always used Crosman bulbs. Nowadays I'm using Umarex (cant find anymore crosman's). Never lubed any bulbs in the Tau's life. Never had a problem.
Tau 7's have been made from the 80's. Dunno how old yrs is, but they ALL start leaking 1 day. Seals arent made to last forever.
Tau used quite hard seals ex factory on their newest models(iirc, white one's). Together with the softish hammer spring, this makes for suburb co2 adjustability (for varying temperature etc) but it also enlarges the chance of a leakage. Lateron, they got softer blue one's. Also, its quite often caused (leakages) by dirt/oil between the valveseal. Too much oil or the wrong one can cáuse leakages.
In yr case, change the valveseal (screw in a bolt or anything into it to pull it out). Or you could try to tap it(valve), to reseal/reseat it.(often helps with the many leaky NEW Tau's )

[zooma]

Thanks for the tips Yana - I know you like the TAU 7 and have some good experience to share.

I am told the Crossman capsules also have some lube atomised in them like the RWS and Walther types etc, but the very cheap (usually silver coloured) ones have no "addatives" in them, and so a spot of the new red Crossman Pellube does the job and comes highly recommended by our local gunsmith for extending seal life.

[zooma]

Today the TAU 7 has decided not to leak !....don't know whether to strip the valve or or see how it goes!

Hi Yana - Although I have been told the Crossman bulbs are lubricated - but I am not sure about the Umerex ones, as I have never seen them - I will try to find out.

As a guide I was told if the bulb is gold coloured - this denotes it includes lube -and usually costs a bit more. It it is silver then it has no lube and should cost less.

This may or may not be true, but the description fits the types I have seen and used so far.

[hwtyger]

Than the leakage could've been caused by contaminated.
I'd just wait and see how it goes. Or open and only clean it.
I thínk it dóesnt have oil in it(bulbs) when it says its suitable for human consumption as well.
Not sure though.
Its sáid that crosmans have lube in them as well.

[zooma]

You could be right about the contamination as the previous owner never used a dedicated lube oil, he just added some silicone shock fluid as used in r/c model cars shock absorbers, and I think it was a bit too thick a grade and may have "gummed-up" the valve.

Maybe the thinner grades of model car shock absorber silicone shock fluids would work OK, but I don't see the point when there are products about that are known to work and don't cost much different to the model car shock fluids to buy.

We will put a spot ofthe new type red Pellgun oil on the neck of every new capsule when we use the non-lubricated cheaper types of CO2 cylinders to keep it clean and working well.

When we use the gold coloured CO2 "gun" capsules we will not use any extra lube as they don't need it.