I needed a starter solenoid for mine and initially all I found was complete starters for $170 but that wasn't going to work for me. Below is the process I went through,some of which may help you with yours.
As it turned out, looking at buyer's guides on the parts sites, the solenoid was also used in early 80s Mitsubishi Tredia, automobile and the entire starter on a slew of forklifts as was the entire K3C engine. I also did find the entire starter for $70 but hey, if I can buy individual parts to rebuild my original Mitsubishi starter casting then I'll never need a complete starter. Let alone a $2-400 unit.
MM401600 seems to be your starter and the number should be cast into the casing if it's still the original mitsu case. Woods has that number listed and one of the alternate numbers/crossover (M4T14674) indeed has all the bits and pieces listed. (all Mitsubishi #s) I don't see anything popping up off the bat on wilson but wood has a LOT of crossover numbers so between the two and general web search, ebay, amazon, rockauto etc, if you spent enough time, you could probably whittle the several hundred dollar starter down to a reasonable price or find individual parts for it. I see one site has a slightly rusty rebuilt unit for almost $450, such a deal.
Good Luck, John
STARTER: 1.6kW
Amazon and Ebay search for MT180 starter bring up M2T50381, (MM409410)
1985-1990 Case 235, 245 & 255 Tractors with Mitsubishi K3 Engines
CASE Ag & Industrial
A search for M2T50381 brought up woodauto.com of the UK. In business since 1929 they give a list of all the parts of the starter, ie solenoid, caps, brushes etc, along with corresponding part #s. The number for the solenoid is M371X33071.
A search on ebay for that number brings up plenty of solenoids for $20-25
One of the numbers that the UK folks have for the brushes is M648C10371. That brought up wilsonautoelectric.com and they give cross reference number for the brushes though they don't seem to sell them. They have a "find a store" link and that brought up local chain auto parts stores but I doubt they could get the brushes. At least not cheap. Off to search some more.
One of the cross reference numbers for the brush set is Standard Brand CX7. Rockauto has them for $5.52
ecatalog.wilsonautoelectric.com
Being that I like Standard brand, I go back to wilson and cross reference the solenoid which turns out to be SS313 which rockauto also has for $28.79 as a closeout. Unfortunately, the brushes and solenoid ship from two diff locations. I don't really need brushes so I will be buying the $22 solenoid on ebay. Better than paying $170-400 for the whole starter
As it turned out, looking at buyer's guides on the parts sites, the solenoid was also used in early 80s Mitsubishi Tredia, automobile and the entire starter on a slew of forklifts as was the entire K3C engine. I also did find the entire starter for $70 but hey, if I can buy individual parts to rebuild my original Mitsubishi starter casting then I'll never need a complete starter. Let alone a $2-400 unit.
MM401600 seems to be your starter and the number should be cast into the casing if it's still the original mitsu case. Woods has that number listed and one of the alternate numbers/crossover (M4T14674) indeed has all the bits and pieces listed. (all Mitsubishi #s) I don't see anything popping up off the bat on wilson but wood has a LOT of crossover numbers so between the two and general web search, ebay, amazon, rockauto etc, if you spent enough time, you could probably whittle the several hundred dollar starter down to a reasonable price or find individual parts for it. I see one site has a slightly rusty rebuilt unit for almost $450, such a deal.
Good Luck, John