Spring 6132101300

Open the machine up and try to run it, saw that water was spraying from the valve. Ordered a new valve the o rings and a spring (because I lost it on the disassembly) on the small hose that connects the valve to the boiler i replaced the 2 o rings and replaced the valve. Tried again the machine and everything was back to normal!:) now I have my espresso machine working like new and for under 10$, love it!
P.s the valve just need screw in, I used some pliers to tie it up (not too hard)

I've had this machine for almost 10 years. 3 years ago it developed a leak. I looked at repairing it but the parts were not available at the time. We bought a new Delonghi (the 3300) and I kept the 5400 for parts as it looked like all the internal mechanical components were the same. We now purchased a cabin in the woods and wanted good coffee. These machines are pretty pricey these days so I decided to take a stab at repair again. Thanks to e-replacementparts I was able to get the parts I needed for a reasonable price. To get at the generator, first unplug the unit, then you need to remove all the outer housing panels (this should be obvious). Then the generator has 4 long machine screws holding it in place as well as 6 wires that need to be disconnected. Two are power, two are sensors and 2 are for a microswitch. I just followed the leads back to where they connected and took photos of where they plugged into so I could plug in the new generator. After unplugging the wires you'll need to remove the 4 long screws. A Phillips screwdriver and some needle nose players for the small nuts on the bottom. A couple of these nuts are hard to reach and you will need patience upon reassembly and nimble fingers. Once the screws are removed, there are two water connections to remove. they are held on by small metal clips. just pull the clip out with your pliers and the water line will come out. then remove the generator slowly. You will note a black rubber water (drain) connector on the underside of the unit opposite the side water connector. You will want to attach that one first upon putting in the new generator. Reassembly is as they say the opposite of removal. Some tips. Replace the o-rings on the two water lines (order them at the same time) or they will leak as I learned. Attach the black rubber drain line and the side water line before screwing the generator down. Once set in place put all the screws in loosely to get it lined up as it is a tight and precise fit. Get all of the screws tightened down - this is important as the generator is part of the coffee "press" and will be pushed up on when making coffee. After reassembly carefully put the water tank in (without the side panels on and start the machine and make a coffee or two. Use a flashlight to check for leaks around the generator. Be careful not to touch anything as the generator gets very very hot (it may smell a little hot at first use) and there are exposed electrical wires that pose a shock hazard. Once you confirm you have no leaks unplug again and put on the top and side panels. You are now good to go. Use this time to clean the unit thoroughly and lubricate the press o-rings with food grade lubricant. Good luck!

Held with needle nose pliers.

1 Removed back and L side of coffee maker, Removed coffee press capsule via port behind water reservoir. Lift top off
2 Remove 4 screws holding press capsule together, take pix so levers on bottom can be put in exactly same position. Then remove piston, the remove O-rings, clean grooves thoroughly, grease new rings, and replace them
3 Remove center phillips screw on screen on piston top, clean thoroughly w soap/water and replace
3A. Reassemble piston into press capsule, take care to insert the spring under the top level lever, and refer to your picture to reassemble to press capsule.
4. Examine tube location, remove and replace. DO not disassemble steam generator unless A. there is evidence of leakage or your unit is not producing adequate steam on steam setting.
5. Re-assemble tops side and back.

This beautiful bean to cup machine had had a hard life when I picked it up on eBay, but the seller said the machine turned on and warmed up. Critical to a cost effective repair. These things need a deep clean...A complete strip-down..Even when normally working. This machine didn't appear to have ever had a clean.

Strip down revealed the big seals on the piston and infuser were choked with old coffee, and had gone brittle.

The final problem was a leaky o ring on the boiler, and a broken clip.

Removed housing and replaced leaking tube and replaced the spring retainers.