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...actually, scratch that! Diagnosed as "user error" - tank not fully inserted! I've been expecting the pump to fail since the earlier part of this thread and just jumped the gun... It's still hanging in there...
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...well, seems the pump held on for a while, but has probably now failed - but just checking with the group before I order the new parts... The pump is still making the normal noises, but both through the top and the water wand it's not pumping the normal volume - kinda dribbly / spitty. Per noidle22 above, I know I'm probably best to get the priming valve also (not just the pump) - any other recommended parts you'd suggest.
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..of course, the next question is, what to replace it with - so the research begins and the pontificating... Another Sunbeam (7000/7100?), Breville, or low end of the range more serious stuff - perhaps something like the Lelit PL41LEM.
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Oh, nice touch!Originally posted by noidle22 View Post
You can actually rotate the outlet on Ulka pumps without touching those screws, they designed it to do this I assume for more versatility during installation.
I figured to loosen it just in case it messed up that O ring in there.
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Those prices sound high unless you're including postage, or want an excuse to upgrade
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Thanks all - my first fear was that it was this pump starting to give up, looks like that may be the case... Seems that the pumps themselves are around $80 and you can get a kit for $120ish with the other parts that may be needed too...
Might have to start looking around for a replacement...
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You can actually rotate the outlet on Ulka pumps without touching those screws, they designed it to do this I assume for more versatility during installation.Originally posted by Jackster View PostHelps to back off the 2 screws on top of pump, so the top of pump can be rotated so you can get spanner onto the pipe fittings.
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Helps to back off the 2 screws on top of pump, so the top of pump can be rotated so you can get spanner onto the pipe fittings.
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That's a failing coffee pump, it's unable to maintain full pressure and surges. Common on older or high use machines.Originally posted by Footleg View Post...you can see here: https://www.youtube.com/watch?v=TgrOOrNNESk
Despite the pour being a touch tight, the pressure is mid-range, but then as the pour seems to loosen off, the pressure goes UP (??!!)
I'm tamping with a lot less force now too.
Replacing the pump can be troublesome. There is a small plastic valve on top of the pump which needs to be removed and installed on the new pump. Depending how much thread sealant they decided to use on the day it was built dictates if it's going to come out or snap as soon as you put any force on it. The part number for this valve is EM69132C.
The other option is swapping in a complete pump assembly from another machine. In this case you cut the upper rubber mount to remove the whole assembly. It's easiest to cut the mount to remove the pumps anyway, it won't affect the stability or dampening of the pump at all with a cut mount.
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Not sure about steam valve parts. But I did lap my tap and seat and got a much better seal.
Also, silicone group seals are available and are a fair bit nicer. Gunk up in the seal groove can be worthwhile removing.
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You need to remove the screen and the little valve above it also (12mm I think) before you flow test the pump, as the valve upsets the readings. Well it did on mine.
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That's not good. I would guess something pump related, like it's on its last legs. Maybe noidle22 has seen that before and can give a more exact answer. If you take the shower screen out, and run the pump. Then one it's past the preinfusion put a weighed cup under the steam and start a timer. How much water do you get in 30s?
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...you can see here: https://www.youtube.com/watch?v=TgrOOrNNESk
Despite the pour being a touch tight, the pressure is mid-range, but then as the pour seems to loosen off, the pressure goes UP (??!!)
I'm tamping with a lot less force now too.
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So, yesterday I made time to dismantle it again... (it's the putting it back together I dislike the most - the 4 screws that hold down the top are the hardest to get nicely lined up!)
I re-packed under the seal with a cardboard cutout, ran some descaler through (the Sunbeam tablets) and had a good look around - the most obvious issue was the amount of crud under the shower screen... I couldn't see a major issue with the steam valve / leak, although it had corroded the small long screw that holds the actuator on to the splines - so the screw just snapped when I tried to remove it - but I don't see that this'll cause a major issue for now. I tried to nip up the 13mm bolt there, but it seemed tight anyhow. I cleaned that all up and put it back together. I did a few back flushes with cleaner powder, and it actually was spitting out in to the tray reasonably well...
I was optimistic that things would be back to normal - but not quite...
The seal is much better now, although I doubt the cardboard fix will last long - if I get on top of the other issues that's first on the list...
On pulling a new shot, the pressure is inevitably more consistent, but the grinder (Sunbeam Cafe Series - 480?) still has to be set to double what it used to be (more coarse) - has always been down around 4-5, now I've had to move it up to 10-12 just to get anything pushed through. With the seal better than it was, the pressure is back up in the right range, but it does pulse a little - the pressure will fluctuate, dropping and climbing again. Given the pressure is back up in the right area, I guess the pump itself is ok. Maybe the issue is actually with the grinder too...
I think the steam valve may have stopped leaking which is a bonus - I don't see that part commonly available when I do a quick search....
I still don't think it's happy, but at least it's still functional for now....
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What is the pressure gauge showing when pulling a shot? Is that normal?
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