Komatsu 930E-4SE - User Manual

Other manuals for Komatsu 930E-4SE

Questions and Answers

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shannonwilliamsAug 15, 2025
How to fix a Komatsu Trucks pump that does not operate?
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  James MacdonaldAug 15, 2025
  If the pump on your Komatsu Trucks is not operating, ensure that grounding connections to the pump assembly and truck chassis are correctly connected. Also, check for any power loss and repair. Other solutions include replacing the timer assembly, the solenoid valve assembly, or the relay. If the problem persists, repair or replace the motor and/or pump assembly, referring to the shop manual for rebuild instructions.
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Paul SalazarAug 18, 2025
What to do if Komatsu 930E-4SE pump will not build pressure?
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  Michael WilkersonAug 18, 2025
  If your Komatsu Trucks pump isn't building pressure, it could be due to air trapped in the lubricant supply line; prime the system to remove trapped air. Another cause could be a leaking lubricant supply line; check the lines and connections to repair any leakage. Alternatively, the vent valve might be leaking, so clean or replace it. Finally, the pump itself may be worn or scored, requiring repair or replacement, referring to the shop manual for rebuild instructions.
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Julia MooreAug 21, 2025
Why are Komatsu 930E-4SE Trucks bearing points not sufficiently lubricated?
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  Jason FreemanAug 21, 2025
  Insufficient lubrication of bearing points in Komatsu Trucks can occur if the timer/controller cycle time setting is too low; set a longer cycle time or reevaluate lube requirements. Also, the injector output adjustment setting might be too low, so readjust the injector output setting. Another cause is that the timer/controller cycle time setting does not deliver lubricant often enough, so set to a shorter cycle time or reevaluate lube requirements. Finally, the system might be too large for the pump output; calculate system requirements per the planning manual.
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Cody SchwartzAug 25, 2025
Why Komatsu 930E-4SE pump will not prime?
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  knielsenAug 25, 2025
  If your Komatsu Trucks pump won't prime, it may be due to a low lubricant supply. This can be caused by dirt in the reservoir, a clogged pump inlet, or a clogged filter.
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Brian WilsonAug 27, 2025
What to do if the injector indicator stem does not operate on Komatsu 930E-4SE Trucks?
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  Olivia McdonaldAug 27, 2025
  If the injector indicator stem on your Komatsu Trucks does not operate, it could be due to a malfunctioning injector, usually indicated by the pump building pressure and then venting; in this case, replace the individual injector assembly. Alternatively, all injectors might be inoperative because the pump buildup is not sufficient to cycle injectors; service and/or replace the pump assembly, referring to the shop manual for rebuild instructions.
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Daniel VelasquezAug 30, 2025
How to prevent excessive lubrication of bearing points in Komatsu 930E-4SE Trucks?
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  ellismargaretAug 30, 2025
  Excessive lubrication of bearing points in Komatsu Trucks can occur if the controller memory mode is OFF; switch the controller memory mode to ON. It can also happen if the injector output adjustment setting is too high; readjust to a lower setting.
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gregory32Sep 2, 2025
What to check if the pressure gauge does not register pressure on Komatsu 930E-4SE Trucks?
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  Robert HallSep 2, 2025
  If the pressure gauge on your Komatsu Trucks isn't registering pressure, check the hydraulic hose from the steering system for no system pressure to the pump motor. Also, check for no 24 VDC signal at the pump solenoid and determine the problem in the 24 VDC electric system. The pressure reducing valve might be set too low; refer to 'Pressure Control Valve Adjustment'. The 24V Relay (RB7K8 or RB7K5) may be defective, so replace the relay.
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Edward JohnsonSep 5, 2025
How to troubleshoot a Komatsu Trucks controller that does not operate?
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  James RiversSep 5, 2025
  If the controller on your Komatsu Trucks does not operate, turn on electric power to the pump. The 'POWER' LED should light, and the 'PUMP ON' LED should light when 'MANUAL LUBE' is pressed.
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tonybellSep 8, 2025
What to do if 'PUMP ON' LED lights, but load connected to terminals 3 & 4 will not energize on Komatsu Trucks?
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  Jessica LewisSep 8, 2025
  If on your Komatsu Trucks the 'PUMP ON' LED lights, but the load connected to terminals 3 & 4 will not energize, it indicates a printed circuit board failure; remove and replace it.
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jenniferdanielSep 12, 2025
What causes the 'PUMP ON' LED not to light when load connected to terminals 3 & 4 is energized on Komatsu 930E-4SE?
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  Brian ParksSep 12, 2025
  If on your Komatsu Trucks the load connected to terminals 3 & 4 is energized, but the 'PUMP ON' LED does not light, it suggests a failure of the printed circuit board or keypad; remove and replace it.