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[terry1956]

Hi out there. I just purchased a sheerline submarine. The fault with the sub is the dive system. The submarine dives, but unless the water pump is running the sub will surface. My understanding is that the valve that keeps the water in the dive tank is at fault. Can anyone please explain to me what too test and check for, thanks

[gra2]

Google Becks Model Marine in the UK.
They are the new home of Sheerline Submarines he should be able to help you.

Graham

[terry1956]

Thanks

[Subculture]

Google sheerline pinch valve will bring up a host of info. It’s a very basic system.

[gra2]

If you send me a pm I will send you some info to fix your problem.

Graham

[terry1956]

Pm send, thanks for offer of help

[gra2]

Hi terry1956 If you pm me your email address I will send you some info that should help.

Graham 

[terry1956]

Hi can you please send to my new address, I just can’t excess my old one any more. I have pm you my address

[admiral donuts]

The system uses a pinch plunger and ball bearing to crush the silicone tube closed , the servo has a cam carved from a standard servo disc, full transmitter lever one way activates the water pump via a micro switch at the same time the pinch pressure is removed from the plunger , releasing the lever restores pinch pressure , it is possible that cam disc is worn or the silicon tube has worn , the tube runs through a cross drilled plastic block containing a plunger , tube and ball bearing , sometimes water will be retained in the ballast tank , blow into the tank via the silicone tube , this increases the air pressure in the tank and forces out any remaining water , hope this helps