The Komatsu PC35 is a compact excavator designed for tight job sites, valued for its reliability and efficient hydraulic performance. Its instrument cluster provides operators with essential visual alerts to monitor engine, hydraulic, and system health, helping avoid costly downtime.
Komatsu PC35 Warning Light Symbols
| Symbol | Name | Color | What it means | What to do |
|---|---|---|---|---|
| Master Warning (Stop) | RED | A major fault has been detected in a critical system of the PC35, such as engine, hydraulics, or electrical. | Safely stop operation and investigate the source of the alert immediately. | |
| Master Caution | AMBER | A non-critical but important issue has been sensed in the PC35, such as a sensor or minor system fault. | Check the display for further details and address the issue soon. | |
| Check Engine (MIL) | AMBER | The engine control system has found an abnormality in the PC35's emissions or performance parameters. | Review fault codes and schedule inspection; avoid heavy use until checked. | |
| Engine Oil Pressure | RED | Oil pressure in the PC35's engine has dropped below safe operating levels. | Shut down the engine right away and inspect oil level and leaks. | |
| Battery / Charging | RED | The alternator is not charging the PC35's battery, risking electrical system failure. | Stop the machine and check the alternator belt and battery terminals. | |
| Coolant Temperature | RED | The engine coolant temperature in the PC35 has reached a dangerously high level. | Immediately idle down and shut off the engine to cool; inspect coolant and radiator. | |
| Hydraulic System | AMBER | A problem has been detected in the PC35's hydraulic system, such as low pressure or high temperature. | Inspect hydraulic fluid level and look for leaks or restrictions. | |
| Low Fuel | AMBER | The PC35's fuel tank is approaching empty, risking engine stall during operation. | Refuel as soon as possible to avoid unexpected shutdown. | |
| Hydraulic Oil | AMBER | Hydraulic oil level or quality in the PC35 is below normal limits. | Top up or replace hydraulic oil and check for contamination. | |
| Air Filter | AMBER | The air filter on the PC35 is clogged or restricted, reducing engine performance. | Clean or replace the air filter element. | |
| Fuel Filter / Water Separator | AMBER | Water or debris has built up in the PC35's fuel filter, which can cause engine issues. | Drain water separator and replace the filter if necessary. | |
| Service / Hour Meter | AMBER | Scheduled maintenance is due based on the PC35's accumulated engine hours. | Plan for routine servicing per Komatsu's maintenance schedule. | |
| Work Lights | GREEN | The PC35's work lights are currently switched on for improved visibility. | No action needed unless lights are not required. | |
| Beacon / Rotating Light | BLUE | The safety beacon on the PC35 is activated to alert others nearby. | No action required unless beacon is not needed. | |
| Swing / Slew Lock | AMBER | The swing lock is engaged, restricting the PC35's upper structure from rotating. | Disengage swing lock before attempting to rotate the house. | |
| Overload / Capacity | RED | The PC35's hydraulic system has detected an overload condition, risking tipping or damage. | Reduce load immediately and reposition for safe operation. |
16 symbols shown. Icons follow ISO 2575 dashboard standards; exact graphics vary by model year.
Most Important Warning Lights
Engine Oil Pressure Warning
Common causes
- Low engine oil level
- Oil pump malfunction
- Oil filter blockage
What to do
Stop the PC35, check oil level and top up if needed; if warning persists, inspect for leaks or contact Komatsu service for further diagnosis.
Coolant Temperature High
Common causes
- Low coolant level
- Radiator blockage
- Faulty thermostat
What to do
Shut off the engine to prevent overheating, allow to cool, check coolant level, and clean the radiator; seek service if the issue continues.
Hydraulic System Warning
Common causes
- Low hydraulic oil
- Hydraulic leak
- Clogged hydraulic filter
What to do
Inspect and refill hydraulic oil, check for visible leaks or damaged hoses, and replace the hydraulic filter as necessary.
Battery / Charging Warning
Common causes
- Broken alternator belt
- Faulty alternator
- Loose battery connections
What to do
Stop the PC35, inspect the alternator belt and battery terminals, and replace or tighten as needed; if unresolved, contact a technician.
Overload / Capacity Warning
Common causes
- Exceeding rated lift capacity
- Improper load positioning
- Malfunctioning load sensors
What to do
Reduce the load to within PC35 limits, reposition the arm or bucket, and check for sensor issues if the warning stays on.
Frequently Asked Questions
What should I do if the master warning light comes on during digging?
Immediately stop work, idle the engine, and check the display for details about the fault to avoid damaging the PC35.
How often should I check the hydraulic oil level on my PC35?
Check the hydraulic oil level daily before starting operation to prevent system faults or performance drops.
Why does the swing lock light stay on even when trying to rotate?
The swing lock may still be engaged; ensure the lock lever is fully disengaged before attempting to swing the upper structure.
Can I continue working if the air filter warning appears?
It's best to clean or replace the air filter promptly, as a clogged filter can reduce engine power and increase fuel usage.
What does it mean if the beacon light is illuminated?
The beacon is on to increase visibility for safety; turn it off if it's not required for your current site conditions.