The Komatsu PC360 is a powerful hydraulic excavator widely used in heavy construction and earthmoving applications. Its advanced instrument cluster provides operators with essential real-time alerts and status indicators to support safe, efficient operation and timely maintenance.
Komatsu PC360 Warning Light Symbols
| Symbol | Name | Color | What it means | What to do |
|---|---|---|---|---|
| Master Warning (Stop) | RED | A critical fault has been detected in the PC360, such as severe engine or hydraulic failure, demanding immediate shutdown. | Safely stop operation and turn off the engine; investigate the fault via the monitor or service manual. | |
| Master Caution | AMBER | A cautionary condition has appeared, such as abnormal sensor readings or non-critical system alerts, that may affect performance. | Check the display for details and address the caution as soon as possible. | |
| Check Engine (MIL) | AMBER | The engine management system has detected a malfunction in the PC360's engine or emissions components. | Review fault codes on the monitor and consult Komatsu service if the light remains on. | |
| Engine Oil Pressure | RED | Engine oil pressure is dangerously low, risking serious engine damage if the PC360 continues running. | Shut down the engine immediately and inspect oil level and for possible leaks. | |
| Battery / Charging | RED | The charging system is not maintaining battery voltage, indicating alternator or wiring issues on the PC360. | Inspect the alternator, battery connections, and drive belt before restarting. | |
| Coolant Temperature | RED | The engine coolant temperature has exceeded safe limits, risking overheating in the PC360. | Stop the machine, allow the engine to cool, and check coolant level and radiator. | |
| Transmission Temp | RED | Transmission oil temperature is excessively high, which may cause damage to the PC360's drive system. | Pause work, idle the engine, and check transmission oil level and cooling system. | |
| Brake System | RED | A malfunction has been detected in the PC360's braking system, which could compromise stopping ability. | Cease operation and inspect the brake system immediately. | |
| ABS | AMBER | The anti-lock braking system is experiencing a fault; normal braking may still function but ABS is disabled. | Continue with caution and schedule ABS system inspection. | |
| Parking Brake | RED | The PC360's parking brake is engaged or fails to release properly. | Release the parking brake before moving; if it won’t release, check the brake control circuit. | |
| DPF / Regeneration | AMBER | The diesel particulate filter requires regeneration due to soot build-up in the PC360. | Initiate or allow automatic regeneration per operator's manual instructions. | |
| DEF / AdBlue | AMBER | The DEF/AdBlue tank is low or a fault is detected in the dosing system, impacting emissions control. | Refill DEF/AdBlue and check for leaks or sensor faults. | |
| Water in Fuel | AMBER | Water contamination has been detected in the PC360's fuel filter, risking injector damage. | Drain water from the fuel filter separator promptly. | |
| Low Fuel | AMBER | Fuel level is low, and the PC360 will soon require refueling to avoid engine stalling. | Refuel at the next safe opportunity. | |
| High Beam | BLUE | The high beam headlights are activated on the PC360 for improved visibility. | Switch off if not required for current conditions. | |
| Hydraulic System | RED | A critical hydraulic system fault has been detected, possibly causing loss of implement control. | Stop machine movement and check hydraulic oil level, filters, and hoses. | |
| Reduced Power (Limp Mode) | AMBER | The PC360 has entered limp mode to protect engine or emissions systems from further harm. | Limit operation and arrange for diagnostics and repairs promptly. | |
| Hydraulic Oil | AMBER | Hydraulic oil level or pressure is below normal in the PC360, which may affect machine performance. | Check and top up hydraulic oil; inspect for leaks. | |
| Engine Oil Temperature | AMBER | Engine oil temperature is higher than recommended but not yet critical on the PC360. | Monitor temperature closely and reduce engine load. | |
| Air Filter | AMBER | The PC360's air filter is clogged, reducing airflow to the engine and affecting efficiency. | Clean or replace the air filter as soon as possible. | |
| Fuel Filter / Water Separator | AMBER | The fuel filter is restricted or water is present, risking poor engine performance on the PC360. | Replace or drain the fuel filter/water separator. | |
| Service / Hour Meter | AMBER | Scheduled maintenance is due based on the PC360's operating hours. | Perform required service tasks as indicated in the maintenance schedule. | |
| Work Lights | GREEN | Work lights are switched on, illuminating the PC360's immediate work area. | Turn off when not needed to preserve battery life. | |
| Beacon / Rotating Light | AMBER | The rotating beacon is active, signaling that the PC360 is operating in the work zone. | Ensure beacon is functioning during operation in active sites. | |
| Swing / Slew Lock | AMBER | The swing lock is engaged, preventing the PC360's upper structure from rotating. | Disengage swing lock before rotating the upper structure. | |
| Overload / Capacity | RED | The PC360 has exceeded its lifting capacity, risking structural damage or tipping. | Lower the load immediately and reassess lifting plan. | |
| Door Open | AMBER | A cab or service door is open on the PC360, which may compromise safety. | Secure all doors before resuming operation. | |
| High Exhaust Temp (HEST) | AMBER | Exhaust temperatures are elevated, often during DPF regeneration on the PC360. | Avoid parking near flammable materials until the light turns off. |
28 symbols shown. Icons follow ISO 2575 dashboard standards; exact graphics vary by model year.
Most Important Warning Lights
Engine Oil Pressure
Common causes
- Low oil level due to leaks or consumption
- Faulty oil pump
- Blocked oil filter
What to do
Immediately shut down the PC360, check oil level and for visible leaks, and replace the oil filter if necessary before restarting.
Coolant Temperature
Common causes
- Low coolant level
- Radiator blockage
- Faulty thermostat or water pump
What to do
Stop the machine and allow it to cool, then inspect and top up coolant, clean radiator fins, and check for thermostat function.
Hydraulic System
Common causes
- Hydraulic oil leak
- Clogged hydraulic filter
- Pump or hose failure
What to do
Stop all movements, inspect the hydraulic tank level, replace filters if needed, and repair any leaks before resuming operation.
Overload / Capacity
Common causes
- Attempting to lift a load beyond rated capacity
- Incorrect load chart usage
- Unstable ground conditions
What to do
Lower the load immediately, verify load weight and ground conditions, and consult the PC360 lift chart before attempting again.
Battery / Charging
Common causes
- Alternator failure
- Loose or corroded battery connections
- Damaged wiring harness
What to do
Check alternator output, ensure all battery terminals are tight and clean, and inspect wiring for visible damage.
Frequently Asked Questions
What should I do if the DPF regeneration light comes on during work?
Follow the PC360 monitor prompts to allow or initiate regeneration; avoid interrupting the process to maintain emissions performance.
Can I keep working if the DEF/AdBlue light is on?
You should refill the DEF/AdBlue tank as soon as possible, as continued operation with low levels may trigger reduced power mode.
Why does the hydraulic oil warning appear even after topping up?
Persistent warnings may indicate a leak, clogged filter, or sensor fault; inspect the hydraulic system and replace filters if needed.
Is it safe to operate with the master caution light on?
While not immediately critical, you should check the monitor for details and address the issue soon to prevent escalation.
What maintenance is needed when the service/hour meter light comes on?
Perform the scheduled maintenance listed in the PC360's manual, such as oil changes, filter replacements, and inspections.