Hitachi EX27U - User Manual

Questions and Answers

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Joshua FreemanAug 19, 2025
How to troubleshoot a Hitachi EX27U Excavators engine that won't start?
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  Jose KennedyAug 19, 2025
  If your Hitachi Excavator's engine won't start, several issues could be the cause. Here's what to check: * **Starter:** If it's not rotating, recharge or replace the battery. Repair or replace the starter if it has failed. Ensure connections are clean and tight. * **Engine Temperature:** If the engine is too cold, preheat it or warm up the coolant by pouring hot water into the cooling system. * **Fuel System:** Bleed air from the fuel system. Refuel if the tank is empty. Clean or replace the fuel filter if it's restricted.
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Riley ObrienAug 21, 2025
What to do if my Hitachi EX27U engine overheats?
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  Paul HuntAug 21, 2025
  If your Hitachi Excavators engine is overheating, consider the following: * Check the coolant level and look for leaks; add coolant and repair any leaks. * Inspect the fan belt for looseness or oil contamination; adjust or replace the belt as needed. * Clean or repair clogged or bent radiator fins. * Consider replacing the thermostat if it's failing.
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Robert RobertsAug 23, 2025
Why does my Hitachi EX27U engine knock or run irregularly?
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  morgan28Aug 23, 2025
  An engine that knocks or runs irregularly in your Hitachi Excavators may be due to: * A restricted fuel filter. Clean or replace it. * Air in the fuel system. Re-tighten connections and bleed the system. * A restricted air cleaner. Clean or replace the element.
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David MitchellAug 26, 2025
Why do all actuators on my Hitachi Excavators have insufficient power?
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  Peggy MaldonadoAug 26, 2025
  If all actuators on your Hitachi Excavators lack sufficient power, the following could be the reasons: * The engine power might be insufficient. Inspect and repair as needed. * The hydraulic pump may be excessively worn. Consider replacing it. * The main relief valve might have failed. Readjust the pressure setting or replace the valve. * The hydraulic oil level may be low. Add hydraulic oil. * The suction filter may be restricted. Clean or replace it.
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Jonathan LynnAug 27, 2025
What to do if Hitachi Excavators engine stalls?
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  Sarah NguyenAug 27, 2025
  If your Hitachi Excavators engine stalls, check the following: * Ensure there is fuel in the fuel tank; refuel if necessary. * Check for air in the fuel system; re-tighten connections and bleed the system.
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Rachel JacksonAug 29, 2025
Why won't the starter rotate on my Hitachi EX27U Excavators?
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  Bryan WolfAug 30, 2025
  If the starter on your Hitachi Excavators won't rotate, examine these potential causes: * Harness failure: Inspect and repair. * Low battery power: Charge the battery. * Loose or corroded battery connections: Clean and tighten them. * Key switch failure: Replace the key switch.
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athompsonSep 1, 2025
Why is the swing power insufficient or jerky on my Hitachi EX27U?
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  Jeremy LittleSep 1, 2025
  If you're experiencing insufficient swing power or jerky upperstructure swing on your Hitachi Excavators, consider these potential causes: * Hydraulic pump performance drop: Replace the pump. * Low pressure valve setting: Adjust the pressure setting, or replace the valve. * Swing motor performance drop: Replace the swing motor. * Swing bearing seizure: Lubricate or replace the swing bearing. * Foreign matter sticking in brake valve: Clean the brake valve. * Oil leak inside control valve: Replace the control valve.
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Candace OrtizSep 3, 2025
What causes a Hitachi EX27U Excavators machine to not travel smoothly?
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  michael56Sep 3, 2025
  If your Hitachi Excavators machine isn't traveling smoothly, check these items: * Track tightness: Adjust the track sag. * Foreign objects: Remove any rocks or debris stuck in the tracks. * Counterbalance valve: Replace if it has failed. * Travel motor: Replace if performance has dropped.
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Michael RodriguezSep 5, 2025
Why does my Hitachi EX27U Excavators machine mistrack?
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  adamfletcherSep 5, 2025
  If your Hitachi Excavators machine is mistracking, here are possible causes: * Uneven track sag: Adjust track sag properly and equally on both sides. * Hydraulic pump performance drop: Replace the pump. * Oil leak inside control valve: Replace the control valve.
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benjamin60Sep 7, 2025
What should I do if the engine oil pressure indicator comes on in my Hitachi Excavators?
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  Mrs. Natalie ReynoldsSep 7, 2025
  If the engine oil pressure indicator comes on in your Hitachi Excavators, it could be due to: * Insufficient engine oil: Add oil. * Oil leak at connections: Repair the leak. * Oil pressure switch failure: Replace the switch.