The Komatsu Forklift FG25ST-16 is a reliable internal combustion, cushion tire forklift designed for mid-capacity warehouse and yard operations. Its instrument cluster provides clear, concise warnings and status updates to help operators maintain safe and efficient performance. Understanding these indicators is crucial for minimizing downtime and preventing costly repairs.
Komatsu Forklift FG25ST-16 Warning Light Symbols
| Symbol | Name | Color | What it means | What to do |
|---|---|---|---|---|
| Master Warning (Stop) | RED | A major system fault has occurred on your FG25ST-16, such as critical engine or hydraulic failure. | Cease operation immediately and investigate the root cause before restarting. | |
| Check Engine (MIL) | AMBER | The engine control system has detected a malfunction specific to the FG25ST-16's fuel, ignition, or emission components. | Schedule diagnostic service soon to prevent further engine issues. | |
| Engine Oil Pressure | RED | Engine oil pressure has dropped below safe levels, risking severe engine damage in your FG25ST-16. | Shut down the engine immediately and check oil level and leaks. | |
| Battery / Charging | RED | The alternator is not charging the battery, or battery voltage is critically low. | Inspect the charging system and battery connections before further use. | |
| Coolant Temperature | RED | Engine coolant temperature on the FG25ST-16 has exceeded the safe threshold. | Stop the forklift, allow it to cool, and check coolant level and radiator for obstructions. | |
| Brake System | RED | A failure or major issue has been detected in the FG25ST-16's primary brake system. | Do not operate until brakes are inspected and repaired. | |
| Parking Brake | AMBER | The parking brake is engaged while the ignition is on. | Release the parking brake before moving the forklift. | |
| Seat Belt | AMBER | The operator seatbelt is not fastened while the FG25ST-16 is running. | Secure your seatbelt before operating. | |
| Low Fuel | AMBER | LPG fuel level is nearing empty in the cylinder or tank. | Replace or refill the LPG tank soon to avoid stalling. | |
| Service / Hour Meter | AMBER | Scheduled maintenance interval has been reached based on operating hours. | Arrange for required service to maintain warranty and reliability. | |
| Work Lights | BLUE | The FG25ST-16's overhead work lights are currently switched on. | Turn off work lights when not needed to conserve battery power. | |
| Overload / Capacity | RED | The forklift is overloaded beyond its rated lifting capacity. | Lower the load immediately and reduce to within rated limits. | |
| Hydraulic Oil | AMBER | Hydraulic oil level or pressure is below optimal on your FG25ST-16. | Check hydraulic oil reservoir and inspect for leaks. | |
| Air Filter | AMBER | The air filter is clogged, restricting airflow to the engine. | Replace or clean the air filter promptly to prevent power loss. | |
| Fuel Filter / Water Separator | AMBER | The fuel filter is blocked or water is detected in the fuel system. | Drain water separator and replace the filter if needed. | |
| Battery Discharge (BDI) | AMBER | Battery charge is getting low, especially if using electrical accessories. | Monitor battery usage and recharge or replace if necessary. | |
| Mast / Lift Limit | AMBER | The mast has reached its upper or lower mechanical limit. | Operate the mast within safe range to avoid mechanical damage. |
17 symbols shown. Icons follow ISO 2575 dashboard standards; exact graphics vary by model year.
Most Important Warning Lights
Engine Overheating
Common causes
- Low coolant level
- Radiator blockage
- Faulty thermostat
What to do
Stop the FG25ST-16, allow the engine to cool, then check coolant level and radiator. Clean or replace faulty components before resuming operation.
Low Engine Oil Pressure
Common causes
- Insufficient oil level
- Oil pump failure
- Severe engine wear
What to do
Shut off the engine immediately, check and top off oil, and inspect for leaks. If pressure remains low, have a technician diagnose the oil system.
Hydraulic System Failure
Common causes
- Low hydraulic oil
- Leaking hoses or fittings
- Failed hydraulic pump
What to do
Inspect and refill hydraulic oil as needed, check for obvious leaks, and have the hydraulic system serviced if problems persist.
Brake System Malfunction
Common causes
- Worn brake pads
- Hydraulic brake fluid leak
- Master cylinder failure
What to do
Do not operate the forklift; have the brake system thoroughly inspected and repaired by qualified personnel.
Frequently Asked Questions
What should I do if the Check Engine light turns on, but the forklift seems to run normally?
Continue operating with caution, but schedule a diagnostic check soon, as minor issues can escalate if ignored.
How often should I check fluid levels on the FG25ST-16?
Check engine oil, coolant, and hydraulic fluids daily before starting your shift to prevent unexpected breakdowns.
Can I keep operating if the air filter light is on?
It's best to clean or replace the air filter promptly, as continued use can reduce engine power and efficiency.
Why does the Overload light activate even when my load seems light?
Unevenly distributed loads or mast angle can trigger the overload sensor; always check load placement and weight.
What does it mean if the Battery Discharge (BDI) indicator stays on?
This means your battery is running low; minimize electrical use and recharge or replace the battery soon.