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    Hitachi EX120-2 fuel issue after clean clogged banjo screen filter

    Hello, we’ll I’ve been tinkering with my ex120-2, due to maybe low power. I read the threads to check the fuel banjo screen filter. Now machine cranks up and runs great and smooth. I pulled banjo and filter was pretty darn clogged. I was happy to think wow here’s my low power problem. So...
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    Hitachi Control Pattern now changed all of a sudden

    HEF- I’m thinking I’m crazy, but got on my Hitachi EX120-2, and the controls are different. A worker used it one day on my site, and now, right hand; turns , arm out and in, and left runs boom up and down and bucket. I thought only if manually swap all the lines the controls change? I see no...
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    Hitachi EX120-2 swing motor with hydraulic fluid

    HEF - Have a Hitachi EX120-2, with what appears to be hydraulic fluid getting into swing gear oil. Is it possible it could be water? I checked the oil prior and was clean etc. about two weeks ago. I hit a tree pretty hard while swinging which I think may have caused some sort of damage, as now...
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    Wanted: Track Adjuster Hitachi EX120-2

    Wanted: Track Adjuster Hitachi EX120-2 , part number 9092563
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    Hitachi EX120-2 tack adjuster leaking on zerk fitting side

    Hi all, have a track adjuster that starts leaking as soon as I put grease in on the zerk fitting side right under the fitting, not from the normal front end with seals. Is this a crack I can simply weld, or some sort of adjustment?
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    Hitachi Ex120-2 ignition switch HOT(temperature )

    HEF - Have an EX120-2, just noticed the ignition switch where key goes in gets real hot, if you touch the silver metal area it will almost burn your hand. Anyone have this problem? Guess it’s just a new ignition switch to fix problem?
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    Looking for a Dr. Ex or Zx

    HEF - Wanting to buy a legit Dr. Ex or ZX for a Hitachi EX120-2. Already purchased 4 CN variations, none of which work.
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    Swafly Parts?

    Anyone purchase from these guys? They seem legit possibly... website: https://www.swaflyparts.com/;https://swaflyengine.com/ Facebook: https://www.facebook.com/swaflymachinery
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    Hitachi EX120-2 Main Pump?

    HEF - Hi, working towards diagnosing if my main pump needs a rebuild. When purchased the guy said the pump was weak and would most likely need a rebuild. The machine appears to have 6,700 hours. So my basic testing to confirm has been to push against a tree, and the machine applies some power...
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    Hitachi EX120-2 Performance Tuning

    HEF - Curious if anyone has done any performance-type items to a Hitachi EX120-2. The first thing that comes to mind is to add a turbo intercooler so that on long hot running days, can maintain some type of decent inlet pressure to maintain horsepower. Keep the engine a little cooler also. I...
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    Wanted; Hitachi EX120-2 Parts

    Wanted Hitachi EX120-2 parts or whole parts machine. Location SouthEast if possible 1. Tracks/chains
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    Hitachi EX120-2 track chain repairs

    Hi all on HEF. Have a Hitachi EX120-2, have been doing some repairs on, and now onto the track portion of help. Pic below shows how kinked they are, about 10-20 on each side. After power washing and putting penetrant lube on each link, they spin much better and started to free up and rotate...
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    Hitachi ex120-2 and ex120-1 compatability

    HEF - While I diagnose my machine, I also came across a parts machine. What is the compatibility on a -1 and -2? Interesting too, the -1 machine engine is transverse to my machine. Is this a gray market machine? SN:12H-19627
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    Hitachi ex 120-2 Repair Support

    HEQ members. Have a new to me Hitachi ex 120-2 that has arrived. I started a listing below of repair support questions from the forum experts here... Prior owner said Hitachi was diagnosed as needing a new computer and possible main pump rebuild, due to operating a little weak. Seems to me to...
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    CAT 312 with S4K Mitsubishi rebuild, or swap to Cummins 4BT or Other?

    Hello all. Have a question regarding a 1994 CAT 312 with Mitsubishi S4K-T. The S4K is dead and I don't think a rebuild is a smart play. Would anyone be an S4K expert here to suggest a rebuild person? I can't seem to find anywhere on the internet a used S4K-T to just drop back in. So thinking...
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