Komatsu WA470-5H User Manual (English)

Questions and Answers:

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Sandy ReedSep 5, 2025
What to do if Komatsu Lifting Systems engine does not start when starting motor is turned?
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  Michelle FerrellSep 6, 2025
  If the engine does not start when the starting motor is turned, it could be due to: * Lack of fuel. Add fuel. * Air in the fuel system. Repair the place where air is sucked in. * No fuel in the fuel filter. Fuel filter with fuel. * Defective supply pump or injector. Replace the pump or injector. * Starting motor cranks engine too slowly. See ELECTRICAL SYSTEM. * Starting motor does not turn. See ELECTRICAL SYSTEM. * Preheating pilot lamp does not light up. See ELECTRICAL SYSTEM. * Defective valve clearance (Defective compression). Adjust valve clearance.
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ashley88Sep 4, 2025
What causes excessive bubbles in oil in Komatsu WA470-5H?
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  Donna RodriguezSep 5, 2025
  Excessive bubbles in the oil can be caused by: * Using low-quality oil. Replace with good quality oil. * Low oil level. Add oil to the specified level. * Air in the oil line. Bleed the air.
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Robin AlexanderAug 23, 2025
Why is my Komatsu Lifting Systems engine oil pressure caution lamp on?
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  William WalkerAug 23, 2025
  The engine oil pressure caution pilot lamp may light up due to several reasons: * The engine oil pan oil level is low, causing it to suck in air. Add oil to the specified level. * The oil filter cartridge is clogged, replace the cartridge. * There is defective tightening of the oil pipe joint, or oil leakage from a damaged part. Check and repair. * The monitor is defective, replace it.
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Carol FernandezSep 3, 2025
Why Komatsu WA470-5H Lifting Systems starting motor disengages before engine starts?
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  Nicholas DeanSep 3, 2025
  If the starting motor disengages before the engine starts, it could be due to: * Defective wiring. Check and repair the wiring. * Insufficient battery charge. Charge the battery.
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Barbara HolmesSep 2, 2025
Why Komatsu Lifting Systems exhaust gas occasionally turns black?
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  Teresa DiazSep 2, 2025
  If the exhaust gas occasionally turns black, check for: * A clogged air cleaner element. Clean or replace it. * A defective injector. Replace the injector. * Defective compression. See defective compression above. * A defective turbocharger. Clean or replace the turbocharger.
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Catherine HarrisSep 1, 2025
Why Komatsu WA470-5H Lifting Systems water temperature gauge is in white range?
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  Chad LongSep 1, 2025
  If the water temperature gauge is in the white range on the left, it could be caused by: * A defective thermostat. Replace the thermostat. * A defective monitor. Replace the monitor.
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Michael Nichols DDSAug 31, 2025
How to fix Komatsu Lifting Systems lamp that does not glow brightly?
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  Wanda LeonAug 31, 2025
  If the lamp does not glow brightly even when the engine runs at high speed, it could be due to: * Defective wiring. Check and repair loose terminals or disconnections. * Defective adjustment of belt tension. Adjust the alternator belt tension.
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Jennifer Lucas DDSAug 30, 2025
What to do if Komatsu WA470-5H Lifting Systems brake is not applied when pedal is depressed?
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  Steven TerrellAug 30, 2025
  If the brake is not applied when the pedal is depressed, consider the following: * The disc may have reached its wear limit. Replace the disc. * There may be a defect in the hydraulic system. Add oil to the specified level. * There may be a lack of oil. Add oil to the specified level. * There may be air in the brake line. Bleed the air.
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xfreemanAug 29, 2025
How to fix Komatsu Lifting Systems brakes squealing?
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  Donna MartinezAug 29, 2025
  If the brakes are squealing, it could be due to: * A worn disc. Replace the disc. * A large amount of water in the axle oil. Change the axle oil. * Deteriorated axle oil due to overuse of the brake. Change the axle oil.
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russellchristineAug 28, 2025
What to do if Komatsu WA470-5H Lifting Systems hydraulic pressure is low?
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  Susan ShepherdAug 28, 2025
  If the hydraulic pressure is low, it may be because the oil level is low and the pump is sucking in air. Add oil to the specified level, then bleed air.