UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post

emeritus · 28th May 2019, 5:01 pm

You could use a high melting point car grease. I have a tin of "Keenol" that I must have had for 30 years, but I don't know what the current equivalent is. HMP greases like Keenol incorporate a non-lubricating substance ( Bentonite?) that makes the oil component of the grease stay put. If the temperature gets too high, the oil will distill off, leaving the non-lubricating residue behind.

Thanks for the explanation of how these valves work. I did wonder if the three-position valves used the same motor as the two-position ones. I will have to have a look at our valve and see if it would benefit from a dollop of grease.

28th May 2019, 5:01 pm	#15
emeritus Dekatron Join Date: Jan 2012 Location: Brentwood, Essex, UK. Posts: 5,349	Re: Heat sinking grease? You could use a high melting point car grease. I have a tin of "Keenol" that I must have had for 30 years, but I don't know what the current equivalent is. HMP greases like Keenol incorporate a non-lubricating substance ( Bentonite?) that makes the oil component of the grease stay put. If the temperature gets too high, the oil will distill off, leaving the non-lubricating residue behind. Thanks for the explanation of how these valves work. I did wonder if the three-position valves used the same motor as the two-position ones. I will have to have a look at our valve and see if it would benefit from a dollop of grease.