Thanks for the write up! I still have my old BII as well and it's been a couple of years since I put a pump in. I paid 51 plus freight for the last one. I just ordered the one you got from Amazon to keep as a spare since I know I will need it eventually.
Herman On Fri, Jul 23, 2021 at 12:22 PM Eric Christoffersen <[email protected]> wrote: > Hi All, figured I should share my fresh memories of pump change on my b2. > I'm writing these notes for you but also so I can find them the next time > the pump goes out. > > One day for no reason the brewtus was unable to produce more than 5 bar. > Pump got quiet and sort of hummed. I checked the hoses and they weren't > crimped so figured it was the pump. > > My b2 takes an Ulka EAX5, I've replaced it once before so sort of knew the > drill. > > Purchasing: > > It is easily possible to go on the internet and spend $85/$60/45+shipping > for an EAX5, sometimes needing to ship internationally. For my past > experience I found one on amazon so was happy with total price. > > So I went to amazon and searched for EAX5 and it found me parts for $70 > with 1-2 month delivery. Was pretty surprised and that delivery time was > not acceptable. Luckily I searched using bing for 'ulka eax5' and first > thing was an amazon offering for 'recamania ulka eax5' for $25 with free > shipping. Back to amazon and search and can't find it. Weird. > > Ordered the $25 from amazon, arrives next day. > > Replacement: > > The pump is held in place by 3 rubber angles. Each angle has an allen head > bolt from the bottom, then a washer and nut on top. > > Brass pump output rotates in pump so you can't unscrew pump from pressure > relief valve without removing entire assembly. > > Steps I took: > > let machine cool > remove water tank > remove side cover/tank holder > undo poly line to pressure relief valve on right side of machine (12mm > compression nut) > peel angle cap off end of pump on left side > turn machine on side with bowl to catch small output from steam boiler. > Loosen the 3 allen bolts holding the rubber angles > Remove nuts from bolt, catch the washers if they fall free, account for > all parts! > Rotate pump so electrical spades are exposed, disconnect spades. Looking > from left side of machine the blue wire is on top. > Gently coerce pump assembly out of machine > unthread pump from pressure relief valve (12mm and 14mm wrenches) > new pump: make sure it has water in it, instructions suggest fill with > syringe > move rubber angles from old to new pump > connect new pump to pressure relief valve > connect spades to pump > rotate pump so spades are at bottom > > gently coerce pump back into place, ensure pressure relief lines up with > hole behind drip tray (remember the brass pump output rotates in pump) > rotate rubber angles roughly where they should be over their holes > > now part that was tricky for me, bolt for innermost rubber angle accessed > from right side of machine: > > stack a magazine where machine will sit upright > push allen bolt through hole in bottom of machine, through innermost > rubber angle hole > press allen bolt head with finger to keep it from falling out > rotate machine upright onto magazine. magazine will press against bolt > head, hold bolt from falling out > using forecept (or small needle nose), use bomb defusing skills to place > washer over bolt threads, now same for tiny nut > gently reach in with finger, rotate nut onto bolt threads, finger tight > rotate machine upright and press bolt with finger, then tighten head of > bolt from bottom of machine, its tight! > > roughly repeat above if necessary for other right side rubber angle > left side angle is easy to access, just assemble and tighten > > Snap cap of input line onto left side of pump > gently reconnect poly hose to pressure relief valve, I use a wrap of > teflon tape > (I broke flange from my poly end long ago, it is necessary for compression > nut to hold line, I gently tease a new flange from line by squeezing and > squishing using needle nose. if flange isn't held the poly line will pop > free... :( ) > > test: > Install sheet cover > place heavy surround around machine from back to support filled tank > filled tank into machine > with machine power switch off: plug in machine > lift brew lever so water can flow through pump > turn machine on, listen for happy pump, run for 20 seconds or so then > close brew lever > let tanks fill and for pump to stop > pressure test a few times with blind basket, watch that right hand line > isn't leaking! > > power off, unplug, reassemble machine > > Done! Machine heats up. Works like a champ. Indeed pump was at fault. > > I'd forgotten quite a few of these steps so above took me about an hour to > re-figure. Lets hope I didn't forget anything in my description. > > One thing I notice is how much heavier the machine gets each year. It > wasn't so heavy 15 years ago... > > I disassembled old pump. Don't see anything clearly wrong. Given its an > hour of tricky work there's no way I'd install a 'repaired' $25 pump to > test it. > > -- > You received this message because you are subscribed to the Google Groups > "Brewtus" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/brewtus/6d9349b1-e842-4344-be3d-abf418748defn%40googlegroups.com > <https://groups.google.com/d/msgid/brewtus/6d9349b1-e842-4344-be3d-abf418748defn%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "Brewtus" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/brewtus/CAM9mha1oDatsVepWMDkh7PqcFeOyeBoxA-iPhMcpFUTpYLD9QA%40mail.gmail.com.
