Komatsu HD785-7 - Service Manual

Other manuals for Komatsu HD785-7

Shop Manual51 pages

Brochure8 pages

Questions and Answers

O
oconnorloriAug 12, 2025
Why is my Komatsu Construction Equipment pressurizer running at full speed/noisy?
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  Thomas RuizAug 12, 2025
  If your Komatsu Construction Equipment pressurizer is running at full speed or is making unusual noises, several factors could be responsible: * A blocked filter: service the filter. * An open door or window: ensure all doors and windows are securely shut. * Inadequate cabin sealing: perform a pressure test procedure and seal any leak points. * A blocked sense pipe: ensure the pipe is clear and not bent. * A damaged internal sensor: replace the controller.
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mclaughlinerikaAug 16, 2025
What to do if there is a low pressure alarm on Komatsu Construction Equipment?
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  Christopher ShawAug 16, 2025
  If you're getting a low-pressure alarm on your Komatsu Construction Equipment, it could be due to several reasons: * An open door or window: ensure all doors and windows are securely shut. * Inadequate cabin sealing: perform a pressure test procedure and rectify the cab sealing. * The pressurizer not operating: ensure the correct voltage (12v or 24v) is reaching the pressurizer motor pin A. * A blocked pressure sense tube: unplug it at the monitor and ensure clear flow to the exterior of the cabin. * A poor power supply: check the 20A mains fuse and correct voltage. * A poor earth connection: check the earth continuity at motor pin B.
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hansengaryAug 20, 2025
Why is the filter blocking quickly in my Komatsu Construction Equipment?
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  angela76Aug 20, 2025
  If the filter in your Komatsu Construction Equipment is blocking quickly, it could be due to: * Defective cabin sealing: Perform a pressure test procedure and seal any leak points as required. * A failed pre-cleaner: Check its operation and replace it if necessary.
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James TurnerAug 25, 2025
Why is the controller showing 0.0 pressure on my Komatsu Construction Equipment?
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  dawnewingAug 25, 2025
  If your Komatsu Construction Equipment controller is showing 0.0 pressure, it might be because the fresh air filter is blocked. Check the filter's condition and replace it if needed.
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Jessica PayneAug 27, 2025
How to fix a blank display on Komatsu Construction Equipment?
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  Kim SpencerAug 27, 2025
  If the display on your Komatsu Construction Equipment is blank, there are a couple of potential causes: * Poor power supply: Check the mains supply fuse and ensure the voltage is correct. * Failed controller: Replace the monitor.
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Michael AndersonAug 31, 2025
What to do if I see a *Check filter alarm on Komatsu Construction Equipment?
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  Russell PetersonSep 1, 2025
  If you're seeing a *Check filter alarm on your Komatsu Construction Equipment, it is probably a service hour timeout. Access the Check Runtime menu and reset the hours using the 7597 code.
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Peter SmithSep 4, 2025
What causes Temperature / CO2 error in Komatsu Construction Equipment?
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  westrogerSep 4, 2025
  If you're getting a Temperature / CO2 error on your Komatsu Construction Equipment, it might be because the sensor is not connected. Fit the sensor, or disable it via the site access CO2 and/or temperature menu.
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Brian VasquezSep 8, 2025
What does *ERR error code mean on Komatsu Construction Equipment?
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  Jeremiah RangelSep 8, 2025
  If you're seeing an *ERR error code on your Komatsu Construction Equipment, it could be due to: * A poor sensor connection: Remove and refit the pod connection cable. * Corrupted coding: Access the factory setup and perform a default reset using pin 6759.