Did it sit with primer in in? Those heads look trashed, head 1 is probably totally gone if I were to go off the looks alone. 2 and 3 might be recoverable, and head 4 is a wildcard since there is so much ink on it I cannot see much.
Pick up some Mimaki Maintenance Fluid 16 and try to wipe the heads down with Texwipes (do not use
foam swabs, it dissolves those). Can also use it for nozzle wash, but do NOT exceed 10 minutes. 16 will eat lines if left in a machine a day or two, it's crazy aggressive. With extreme care and LOTS of scrubbing, you might be able to get it printing CMYK well again. Getting the scuzzed up ink off a ceramic head is tricky to do without damaging the head. Might be able to pull them out, soak them and flush them. That said, even doing that, primer heads are rarely recoverable.
However, the underside of the head looks like the previous owner didn't bother with maintenance. Might also have a bad wiper/suction nozzle as well. If I were talking to a customer, I would quote all new heads at the very least and a major scrub-down. Easy 1-2 full day(s) job. Might need capping stations as well, maybe subtanks. Probably flush all 10 lines and check for clogs as well as filters.
Heads: $2100 x4
Filters: $21 x8
Capping Stations: $77 x4
Subtanks: $50 x8
Flush 7: $70/liter
Prices are Digiprint, and those aren't all in stock. Just a ballpark of parts cost you're looking at.
