Bryan this a great set up.

I think this is a great idea! I put one on my FD. But being stubborn I wanted to get one of the small 12V 5A power supplies to work on it. It worked for a minute and then started chattering and stopped pumping. So I killed the power supply and asked myself why. I got to thinking about the pump action and decided that it could be the reverse EMF that was blowing out the supply. I put a protection diode IN5408 3A 1000V across the pump connections with the silver ring (Cathode) on the positive side. Polarity is important. Now my 12V 5A power supply is pumping like a champ. And yes, the diagram that comes with the timer is a little wonky.

You've probably solved this problem by now, but the reason that ball valve leaks is just due to a casting defect or the handle was installed a little wonky. You can remove the nut and re-position the handle , or file away a little of the brass on the stop to let the handle travel further. Cheers!

This solves one of the reasons I have held back on purchasing a freeze dryer. I will have to reconsider. I am amazed at how clean the oil appears.

That's some next level tinkering. Way to engineer!

Great job! Thanks for sharing.

Thanks brian. You solve a puzzle for me concerning the 12v supply. Full speed ahead again buddy.

Thanks for this video. I am setting my oil filter system up today. Does it matter if the filter assembly is above or below the pump? Also, can anyone tell me where I can buy a new cover seal for JB DV 6E pump? JB will not sell to the public and referred me to Century Tool. I bought the gasket from Century, but it is too small and cannot be used. Any other suppliers?

you are awesome

Great info. Thanks for sharing.

I figured it out just had to open you information above, thanks

This helped me a lot! Thank you. I ended up just using a separate reservoir. Pour the dirty oil in. Turn it on and let it work. Pour filtered oil back in pump. Doesn't void pump warranty for those who might be worried about that.

Thanks! very useful project!

There are several videos on youtube showing how to turn a computer power supply into a lab grade 12v power supply. I made one works very well. Also meanwell power supply's are very reliable they make hundreds of different units and are reasonably priced. VanishingFreedom asked a good question in the comments below, Why not filter the actual vacuum line with a trap and keep the water and particulates out of the pump all together? A molecular sieve trap with some kind of particulate filter inline before the sieve should keep the pump from getting any water in it in the first place. Sounds reasonable to me has anyone tried that yet? Anyway thanks for sharing your video I just ordered a freeze dryer and decided I better get a head start on this stuff.

Brian, Thank you so much for taking the time to give us some ideas how to solve the constant oil changes. One improvement I made is to use a programmable outlet timer that way I can delay start of my on/off program for 8-9 hours so it will start after the freeze portion of the cycle. After the cycle is complete all I have to do is unplug the outlet timer (internal battery backup to save settings) then plug back in on the next cycle. I think this is an improvement to the 12v programmable logic controller.

That's brilliant

What did the pump look like inside after 40 batches?

my husband is making this so I won't have to deal with the oil. I'm using a brand new jb eliminator so I can rebuild it without HR control ...

Harvest Right should work with the pump manufacturer to make a system like this to make it easier for the customers. They have the capacity to do a lot of R&D and streamline this. Otherwise, this is an amazing idea that would be beneficial to anyone that has one of these and loves to tinker. Awesome implementation!

Hello! I'm very inexperienced but it seems too little water for four batches, where did the rest go? Does the harvest right have other ways to get rid of the water taken out from the food? Thanks!