The Komatsu Forklift FG18HT-20 is a robust, LPG-powered forklift designed for demanding warehouse and material handling tasks. Its instrument cluster provides essential alerts and status indicators to maximize uptime and operator safety. Understanding these symbols ensures efficient and safe operation specific to this Komatsu model.
Komatsu Forklift FG18HT-20 Warning Light Symbols
| Symbol | Name | Color | What it means | What to do |
|---|---|---|---|---|
| Master Warning (Stop) | RED | A critical system fault has been detected on the FG18HT-20, requiring the forklift to be stopped immediately. | Safely bring the forklift to a halt, turn off the engine, and contact maintenance. | |
| Master Caution | AMBER | A non-critical issue has been identified on your FG18HT-20; continued use may lead to further faults. | Check the display for more details and schedule maintenance soon. | |
| Check Engine (MIL) | AMBER | Engine management has detected an abnormality in the FG18HT-20's LPG engine system. | Plan for inspection at the earliest opportunity to prevent performance loss. | |
| Engine Oil Pressure | RED | Engine oil pressure has dropped below safe levels on the FG18HT-20. | Shut down the engine immediately and check oil level before restarting. | |
| Battery / Charging | RED | The alternator is not charging the battery on your FG18HT-20. | Stop operation and inspect the charging system and battery connections. | |
| Coolant Temperature | RED | Engine coolant temperature is dangerously high on the FG18HT-20. | Turn off the forklift and allow the engine to cool before checking coolant level. | |
| Transmission Temp | AMBER | Transmission fluid temperature is above normal on this Komatsu forklift. | Pause operation to let the transmission cool down and check fluid levels. | |
| Brake System | RED | A brake system malfunction has occurred on the FG18HT-20. | Do not operate the forklift until the brakes are inspected and repaired. | |
| Parking Brake | RED | The parking brake is engaged on your FG18HT-20 forklift. | Release the parking brake before attempting to drive. | |
| Seat Belt | AMBER | The operator's seat belt is not fastened on the FG18HT-20. | Fasten the seat belt before operating the forklift. | |
| Low Fuel | AMBER | LPG fuel level is low in the FG18HT-20's tank. | Refill the LPG tank soon to avoid work interruption. | |
| Hydraulic System | AMBER | A hydraulic system issue has been detected on your FG18HT-20. | Inspect for leaks or low hydraulic fluid before continuing. | |
| Hydraulic Oil | AMBER | Hydraulic oil level or pressure is below recommended on the FG18HT-20. | Check and top off hydraulic oil as needed. | |
| Air Filter | AMBER | The air filter is clogged or dirty on the FG18HT-20. | Replace or clean the air filter to maintain engine performance. | |
| Fuel Filter / Water Separator | AMBER | Fuel filter is restricted or water detected in separator on FG18HT-20. | Drain water and replace the fuel filter if necessary. | |
| Service / Hour Meter | AMBER | Scheduled maintenance is due based on engine hours for the FG18HT-20. | Arrange for routine service to keep the forklift in top condition. | |
| Work Lights | BLUE | Work lights are active on your FG18HT-20 forklift. | No action needed unless lights are not required. | |
| Beacon / Rotating Light | AMBER | The rotating beacon is turned on for safety visibility on the FG18HT-20. | Ensure beacon is functioning in high-traffic or low-visibility areas. | |
| Mast / Lift Limit | AMBER | Lift mast has reached its maximum height or limit on the FG18HT-20. | Lower the mast before continuing operation. | |
| Overload / Capacity | RED | The forklift is overloaded or exceeded rated capacity on the FG18HT-20. | Reduce the load to within specified limits before resuming work. |
20 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 water pump
What to do
Shut down the FG18HT-20, allow it to cool, and check coolant and radiator; repair leaks or replace faulty parts as needed.
Brake Failure
Common causes
- Hydraulic leak
- Worn brake pads
- Low brake fluid
What to do
Do not operate the FG18HT-20; inspect the entire brake system and replace worn or damaged components before use.
Low Engine Oil Pressure
Common causes
- Insufficient oil
- Oil pump malfunction
- Clogged oil filter
What to do
Stop the engine, verify oil level and quality, and service or replace the oil pump or filter if necessary.
Hydraulic System Malfunction
Common causes
- Hydraulic fluid leak
- Contaminated hydraulic oil
- Failed hydraulic pump
What to do
Inspect for visible leaks, check fluid level and cleanliness, and service hydraulic components as needed on the FG18HT-20.
Frequently Asked Questions
What should I do if the Overload light comes on while lifting?
Immediately lower the load to a safe height and reduce the weight to within the FG18HT-20's rated capacity before continuing.
How often should I check the hydraulic oil on the FG18HT-20?
Inspect the hydraulic oil level daily before starting work and top up as needed using the recommended Komatsu hydraulic oil.
Why does the air filter warning light keep appearing?
The air filter may be clogged due to dusty environments; clean or replace it regularly to prevent engine performance issues.
Can I operate the FG18HT-20 if the check engine light is on?
Operation is possible for short periods, but arrange for inspection as soon as possible to prevent potential engine damage.
What does it mean if the beacon light is illuminated?
It means the safety beacon is active, which is important for visibility in busy or low-light areas.