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    EX120 Swing Motor Works Intermittently

    Hi Everyone, Here's a new one... Classic breakdown procedure -> was working just fine over the weekend; parked and shutdown as usual. Today -> After starting the machine the Swing motor stops working after a minute or two of operation. All other stick operations including drive track work...
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    EX120 Operators Switch Panel not working

    Hi Everyone, Hitachi EX120-3 The entire operators right-hand monitor & switch panel has just stopped working. It was fine in the morning, then a lunch break and afterwards the entire panel no longer operates, no lights, not throttle control, nothing. Joystick controls work but not the monitor /...
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    EX120-3 Scratched bucket cylinder rod. Seal Leaking.

    Hi Everyone, As the title says; over the summer I scratched the bucket cylinder rod and didn't notice so it damaged the seal. I epoxied & filed the rod and finished with fine sandpaper. The seal wept slightly and is workable but the leak is slowly getting worse. I'm using the machine and it...
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    EX120 -> Torn Bucket Repair (Pics)

    Hello Everyone, I've torn the bucket on our EX120. It was previously welded along this same edge with a small strapping and held for quite some time but finally gave up. I can reweld it but am not sure how to reinforce the area. Based on the posted pictures, does anyone have advice for...
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    EX120-3 Bleeding Air from Hydraulic System

    Hi Everyone, Looking for instructions on the procedure to bleed air from the hydraulic system on our EX120-3. Recently replaced a final drive hose which had split and caused quite a bit of hydraulic fluid loss before it was noticed. Topped off the hydraulic fluid after the repair and ran the...
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    EX120-3 = JD 490E

    Hello Everyone, Would anyone be able to positively verfy that the Hitachi EX120-3 is the equivelant of the John Deer 490E when searching for parts. Ex: Broke the windshield recently and discovered it's tough to find an EX120 replacement for less than $290 but I can purchase the 490E windshield...
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    Hitachi EX120 -> Fuel Prime pumping air. Considering replacing Lift Pump with Electric?

    Hello Everyone, Fuel issues with our Hitachi EX120. Not running out of fuel. This happens at 2/3 tank. Summary: Engine began to bog down under load (fuel gauge 1/2 tank). Cleaned dirty banjo bolt filter and replaced fuel filter. Prime pump took a long time but finally got it to bleed and it...
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    EX120 - Swing motor gear oil leak (Pictures)

    Hi Everyone, EX120. Have two issues with the swing motor reduction gear unit. 1. The unit is leaking gear oil through the slew ring & onto the belly almost as fast as it goes in, almost... 2. The reduction gear unit housing is cracked at the bolt support flange holes but has been stable for a...
    • Egetebee
    • Thread
    • ex120 gear oil leak reduction gear oil seal swing motor leak
    • Replies: 88
    • Forum: Excavators
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