The Yale GLC100 is a robust LPG-powered forklift designed for demanding industrial applications, featuring a clear and functional instrument cluster to keep operators informed of vital machine conditions. Understanding the specific warning and indicator lights on this model is essential for safe and efficient operation. This guide details only the genuine warning and indicator symbols present on the GLC100.
Yale GLC100 Warning Light Symbols
| Symbol | Name | Color | What it means | What to do |
|---|---|---|---|---|
| Master Warning (Stop) | RED | Signals a major fault detected by the GLC100’s monitoring systems that could cause immediate damage or unsafe operation. | Safely stop the forklift and investigate the specific fault before resuming work. | |
| Check Engine (MIL) | AMBER | Indicates the GLC100’s engine control unit has detected a malfunction affecting performance or emissions. | Schedule diagnostic service to check for engine trouble codes. | |
| Engine Oil Pressure | RED | Warns that engine oil pressure in the GLC100 has dropped below safe levels, risking severe engine damage. | Shut down the engine immediately and check oil level and condition. | |
| Battery / Charging | RED | Alerts that the alternator is not charging the battery, which could leave the GLC100 unable to restart. | Inspect the alternator belt and battery connections right away. | |
| Coolant Temperature | RED | Shows that the engine coolant temperature is too high for safe operation of the GLC100. | Stop the engine and allow it to cool; check coolant level and radiator. | |
| Transmission Temp | AMBER | Indicates the transmission fluid temperature is elevated, which can lead to premature wear in the GLC100. | Pause operation and let the transmission cool; inspect fluid if issue persists. | |
| Brake System | RED | Signals a critical issue with the GLC100’s hydraulic brake system, affecting stopping ability. | Do not operate until brakes are inspected and repaired. | |
| Parking Brake | AMBER | Indicates the parking brake is engaged while the GLC100 is running. | Release the parking brake before moving. | |
| Hydraulic System | AMBER | Shows a fault or low pressure in the GLC100’s hydraulic system, affecting lift or tilt functions. | Check hydraulic fluid level and look for leaks. | |
| Low Fuel | AMBER | Warns that the LPG tank is nearly empty on the GLC100. | Refuel with the correct LPG cylinder soon. | |
| Service / Hour Meter | AMBER | Signals that scheduled maintenance is due based on the GLC100’s engine hours. | Arrange for the recommended service as soon as possible. | |
| Work Lights | BLUE | Indicates that the GLC100’s work lights are turned on for better visibility. | No action needed unless lights are not required. | |
| Beacon / Rotating Light | AMBER | Shows the beacon light is active, warning others of forklift movement in the area. | Ensure beacon is functioning during operation in pedestrian zones. | |
| Overload / Capacity | RED | Indicates the GLC100 has exceeded its rated lifting capacity, risking tip-over. | Lower the load immediately and reassess weight. |
14 symbols shown. Icons follow ISO 2575 dashboard standards; exact graphics vary by model year.
Most Important Warning Lights
Engine Oil Pressure
Common causes
- Low engine oil level
- Oil pump failure
- Blocked oil filter
What to do
Check the engine oil level and top up if necessary, replace the oil filter if clogged, and have a technician inspect the oil pump if pressure remains low.
Coolant Temperature
Common causes
- Low coolant level
- Radiator blockage
- Faulty thermostat
What to do
Allow the engine to cool, refill coolant if needed, inspect for leaks or blockages in the radiator, and replace the thermostat if it’s stuck.
Brake System
Common causes
- Low brake fluid
- Hydraulic leak
- Worn brake pads
What to do
Inspect brake fluid level and top up if low, check for hydraulic leaks, and replace brake pads or components as required before operating.
Overload / Capacity
Common causes
- Attempting to lift a load over rated capacity
- Incorrect load positioning
- Load center too far forward
What to do
Reduce the load to within the GLC100’s rated capacity, ensure proper load placement, and always keep the center of gravity close to the mast.
Battery / Charging
Common causes
- Alternator failure
- Loose or corroded battery cables
- Broken drive belt
What to do
Check the alternator and drive belt for faults, clean and tighten battery connections, and replace faulty components as needed.
Frequently Asked Questions
What should I do if the hydraulic system warning appears on my GLC100?
Stop lifting operations, check the hydraulic fluid level, and inspect for visible leaks; if the issue persists, have a technician diagnose the system.
Can I keep operating if the service/hour meter light is on?
You may finish your current task, but schedule maintenance as soon as possible to avoid potential breakdowns.
Why does the check engine light come on, but the forklift seems to run fine?
The engine control unit may have detected a minor issue that hasn’t yet affected performance; have it checked with a diagnostic tool to prevent future problems.
What action should I take if the overload warning activates?
Immediately lower the load and confirm it is within the GLC100’s rated capacity before attempting to lift again.
Is it safe to operate the GLC100 with the transmission temperature light on?
No, prolonged operation with high transmission temperature can cause serious damage; allow it to cool and check fluid levels.