Hitachi ZAXIS 35U-5N - User Manual

Questions and Answers

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Laura MartinSep 23, 2025
What causes no hydraulic functions with unchanged pump noise on Hitachi ZAXIS 35U-5N Excavators?
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  Lance KeithSep 23, 2025
  If there are no hydraulic functions and the hydraulic pump noise remains unchanged on your Hitachi Excavators, it could be due to a faulty pilot pump, a faulty pilot shut-off solenoid valve, a faulty wire harness (pilot shut-off solenoid valve) pilot shut-off switch, or the pilot control shut-off lever being in the LOCK position. Replace the faulty pilot pump and solenoid valve, repair or replace the wire harness, and turn the pilot shut-off lever to the UNLOCK position.
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Daniel DeanAug 25, 2025
How to fix Hitachi Excavators batteries that will not be charged?
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  cameron08Aug 25, 2025
  If the batteries of your Hitachi Excavators are not charging, the issue might stem from a broken battery separator, requiring a replacement. Alternatively, there could be a faulty regulator, which needs adjustment or replacement. A faulty ground line requires repair, or the alternator itself might be faulty, which means it needs to be repaired or replaced.
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trussellAug 25, 2025
What to do if coolant temperature is too high in Hitachi Excavators?
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  fwestAug 26, 2025
  If the coolant temperature in your Hitachi Excavators is too high, it could be due to several reasons. First, check if the coolant level is low and refill if necessary. Another possible cause is insufficient fan belt tension, which requires adjustment. Inspect the rubber hoses for damage and replace them if needed. A faulty thermostat or coolant temperature gauge can also cause this issue, and both would need replacement.
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Jacob StricklandAug 27, 2025
What to do if starter rotates on Hitachi ZAXIS 35U-5N but it won't start?
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  Michael AllenAug 27, 2025
  If the starter rotates but your Hitachi Excavators won't start, consider these possibilities: the machine might be out of fuel, so check for leaks and refill. There could be air in the fuel system, requiring you to bleed it. A clogged fuel filter is another potential cause; drain any water and replace the element. If the fuel is frozen, warm the fuel pump with hot water or wait for warmer temperatures. Alternatively, the injection pump or preheat system might be faulty, requiring repair and adjustment.
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Tracy GallowayAug 27, 2025
Why does my Hitachi ZAXIS 35U-5N Excavators engine stall soon after starting?
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  Miss Tammy BarnesAug 27, 2025
  If your Hitachi Excavators engine stalls soon after starting, the issue could be due to several factors. The idle speed might be too low, requiring repair and adjustment. A clogged fuel filter or pre-fuel filter (for ZX50U-5N, ZX60USB-5N models) could also be the cause; replace the fuel filter element after draining any water, or clean/replace the pre-fuel filter element. Additionally, a clogged air cleaner can lead to stalling, so clean or replace the element. The engine control system or injection pump might also be faulty, requiring repair and adjustment.
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Roy BakerSep 14, 2025
Why work mode does not change on Hitachi Excavators?
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  robert26Sep 14, 2025
  If the work mode on your Hitachi Excavators does not change, it could be due to a faulty mode switch, poor contact in a connector, a damaged wire harness (between ECU and monitor), a faulty controller (ECU), or a faulty solenoid valve. Repair or replace the faulty components and wiring as necessary.
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jessewalterSep 12, 2025
What causes Hitachi ZAXIS 35U-5N not to travel smoothly?
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  hensonjamesSep 12, 2025
  If your Hitachi Excavators does not travel smoothly, it could be due to overly tensioned or slackened crawler sag, a deformed track frame, or embedded foreign matter such as rock fragments. Also, a dragged parking brake or a faulty counter balance valve can cause this issue. Adjust the crawler sag, repair or replace the track frame, remove any foreign matter, repair the parking brake, and replace the counter balance valve as necessary.
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Susan AllenSep 13, 2025
What to do if engine speed does not change when operating the engine control dial on Hitachi ZAXIS 35U-5N Excavators?
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  Eric RodgersSep 13, 2025
  If the engine speed on your Hitachi Excavators does not change when operating the engine control dial, it could be due to a blown fuse, a faulty engine control dial, poor contact in a connector, a damaged wire harness (between EC dial and monitor), or a faulty controller (ECU). Replace the fuse, repair or replace faulty components, and repair the wiring as necessary.
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clarktylerSep 5, 2025
What causes only one side lever to be inoperable on Hitachi ZAXIS 35U-5N?
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  Kimberly RobertsonSep 5, 2025
  If only one side lever on your Hitachi Excavators is inoperable or has no power, it could be due to a faulty relief valve in the valve, a broken pipe or hose, or a loose pipe line joint. Other potential causes include a broken O-ring at the pipe line joint, a faulty hydraulic pump, a faulty pilot valve, a faulty pilot circuit line, or a faulty pilot solenoid valve. Repair or replace the faulty components and retighten any loose joints.
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wilsonaustinSep 2, 2025
What to do if one or both side tracks are inoperable on Hitachi Excavators?
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  Alicia SummersSep 2, 2025
  If one or both side tracks on your Hitachi Excavators are inoperable, it could be due to a damaged center joint, an incompletely released parking brake, or a broken travel motor, all requiring repair or replacement. Also, a faulty pilot valve, pilot circuit line, or counter balance valve can cause this issue, each necessitating replacement or repair.