MooneyMunnerlyn Posted January 7 Report Posted January 7 I have a 1965 M20E that is having gear retraction issues. It has started to retract only above 100-110 mph now instead of the normal 80 mph that it used to. I have narrowed it to being a switch issue. I am wondering if someone has a diagram on the safety switch itself, including disassembly? Thanks
Fritz1 Posted January 7 Report Posted January 7 switch has 2 wires and is adjustable, I would try adjusting it before taking it apart, if that does not help may still have to take it apart, contacts may have corroded and cleaning may help, these switches are quite expensive, think I bought one for the Bravo 4-5 years ago and it was $1200, if the membrane inside is leaking you may want to look for somebody that overhauls these switches, others will chime in 1
ProtoFly Posted January 7 Report Posted January 7 This may (or may not) be available 'for real' VEP M20J Pressure Switch
Fritz1 Posted January 8 Report Posted January 8 This is a fancy one that includes low/high pitot heat, doubt the offer is real, call Lasar to get a price
1980Mooney Posted January 8 Report Posted January 8 (edited) 8 hours ago, ProtoFly said: This may (or may not) be available 'for real' VEP M20J Pressure Switch 4 hours ago, Fritz1 said: This is a fancy one that includes low/high pitot heat, doubt the offer is real, call Lasar to get a price I say SCAM. Those look like web captures of pages from BAS Parts Sales prior sales - but with only one picture from the usual BAS series that shows all sides and the yellow tag. Edited January 8 by 1980Mooney
DCarlton Posted January 8 Report Posted January 8 I’m on my third switch. Original Dukes and two VEP. VEP is now under World Magnetics. There may be a couple of part numbers in play. Some two wire, some three wire (I think the original Dukes was a two wire; don't remember). You only need two wires unless you want to start a Hobbs meter or something like that. I have the details in my files if you hit a dead end. Not cheap. $$$$ With my second switch, we were able to lubricate it on the workbench with a drop and get it working for a couple of more years. It eventually needed replacement. Can’t remember if it was sticking open or closed but they eventually stick. Not too surprised given their operating environment and the fact that they work off of low pressures. Concur with the recommendation to try to buy through LASAR first to make sure you've getting the right variant and Mooney part number. https://www.worldmagnetics.com/our-switches/veproducts-vep-switches/654-switch-series-ultralow-pressure-vacuum-differential.html
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