Jobo CPP2 Pump Repair

[RawheaD]

Hi all,

It's been a while since I've last posted here. Hope y'all been well.

Recently my Jobo CPP2 started acting up. The motor was getting sticky, struggling on reverse rotation. This I was able to remedy by replacing the motor with a spare I had lying around. The thermostat is whack, but that can be compensated using a thermometer.

The big issue is the pump. One day it just stopped pumping the water. I took it apart and manually rotated the impeller, after which it was rotating fine, albeit with a ton of noise. I put it back, processed some film, but the next time I fired it up, it was not pumping again. I took it apart, put some WD40 through it, and it was rotating fine again, this time with a little less noise. Processed some film. And the next time I fired it up, it's not pumping again. Electricity is being supplied, as I hear a hum when I turn the pump ON.

Anyway, I think I need to do a serious repair of the pump, but I don't see an obvious way of taking apart the pump unit. Long story short, does anyone have any resources on servicing the CPP2 pump?

Thanks!!

[Renato Tonelli]

Give CatLabs a call. They are in the Boston area.

[RawheaD]

Give CatLabs a call. They are in the Boston area.

LOL, sorry I'd forgotten to update my info; I know CatLabs well, but unfortunately I have since moved out of Boston and am now in Albuquerque, New Mexico. Thanks

[LabRat]

One Jobo pump issue at work was that sometimes the pump would clog up due to algae in the water causing a build-up eventually ruining pump...

Flush out pump and lines well with fresh water, and maybe take apart to check for sludge, it does happen...

Steve K

[RawheaD]

One Jobo pump issue at work was that sometimes the pump would clog up due to algae in the water causing a build-up eventually ruining pump...

Flush out pump and lines well with fresh water, and maybe take apart to check for sludge, it does happen...

Steve K

Yes, so I'm more than willing to take apart the pump; I was hoping for a servicing manual or something to guide me through the process. I couldn't see an obvious way to take it apart.

Or.... is it actually possible to take it apart from above, i.e., from the circuit board side? Maybe I didn't dig under all the wiring enough...

[LabRat]

Jobo gear usually isn't obvious or service friendly, so you have to put on your thinking cap and figure out what they did... I remember there were not a lot of manuals around, some parts lists, and usually in German... But keep looking!!!

Good luck!!!

Steve K

[LabRat]

But shaft and impeller area were usual culprits for clogging... Greasing shafts/bearings in pump with teflon/silicone grease will help with the noise...

Steve K

[Jason Greenberg Motamedi]

No promises, but here is a repair manual I have used in the past:
https://silvergrainclassics.com/en/w...ervice-manual/

[Bernice Loui]

The pump motor to impeller shaft is plastic, tends to warp. Once warped enough the impeller is not able to function properly (move water).

Check this,

Bernice

[domaz]

I gave up on mine after it kept doing a grinding noise. Now I just use an aquarium pump that pumps up from the bottle storage area to the top reservoir, but it's quite annoying. I may have to try cleaning it out someday.