The Hyster S80FT is a robust LPG-powered forklift designed for heavy-duty material handling in industrial environments. Its instrument cluster provides operators with essential alerts and system statuses to ensure safe and efficient operation. Understanding these indicators is key to maintaining uptime and preventing costly repairs.
Hyster S80FT Warning Light Symbols
| Symbol | Name | Color | What it means | What to do |
|---|---|---|---|---|
| Master Warning (Stop) | RED | A critical fault has been detected in a major system of the Hyster S80FT, such as engine or hydraulics. | Stop the forklift safely and investigate the source of the warning before continuing. | |
| Master Caution | AMBER | A non-critical system issue has been identified that could affect forklift performance if ignored. | Check the display for further details and schedule maintenance soon. | |
| Check Engine (MIL) | AMBER | The engine control unit has detected a fault in the emission or fuel system specific to the S80FT's LPG engine. | Arrange for diagnostic service to prevent performance loss or emissions violations. | |
| Engine Oil Pressure | RED | Engine oil pressure has dropped below the safe threshold for the S80FT’s 4.3L engine. | Shut down the engine immediately and inspect oil level and leaks. | |
| Battery / Charging | RED | The alternator is not charging the battery, risking electrical system failure. | Inspect the alternator, belt, and battery connections before restarting. | |
| Coolant Temperature | RED | Engine coolant temperature is dangerously high, risking engine damage. | Turn off the engine and allow it to cool; check coolant level and radiator for blockages. | |
| Transmission Temp | RED | The transmission fluid temperature has exceeded safe limits in the S80FT’s powershift transmission. | Stop operation, let the system cool, and check fluid level and cooling system. | |
| Brake System | RED | A malfunction in the primary brake system has been detected. | Cease operation and have the brakes inspected immediately. | |
| ABS | AMBER | The anti-lock brake system is not functioning, affecting stopping performance on slippery surfaces. | Proceed with caution and schedule ABS service. | |
| Parking Brake | RED | The parking brake is engaged while the forklift is in gear or moving. | Release the parking brake before attempting to drive. | |
| Low Fuel | AMBER | The LPG fuel tank is nearing empty, risking engine shutdown. | Refuel the LPG tank at the next safe opportunity. | |
| Hydraulic System | AMBER | A fault has been detected in the hydraulic system, possibly due to low fluid or a filter issue. | Check hydraulic fluid level and inspect for leaks or filter restrictions. | |
| Hydraulic Oil | AMBER | Hydraulic oil temperature or level is outside the normal range for the S80FT. | Allow the system to cool and check oil level and quality. | |
| Engine Oil Temperature | AMBER | Engine oil temperature is higher than recommended for the S80FT’s engine. | Pause operation to let the engine cool, and check oil level and cooling system. | |
| Air Filter | AMBER | Air filter restriction detected, reducing engine efficiency. | Inspect and replace the air filter as needed. | |
| Fuel Filter / Water Separator | AMBER | The fuel filter is clogged or water has accumulated in the separator, risking fuel delivery issues. | Service the fuel filter and drain water separator promptly. | |
| Service / Hour Meter | AMBER | Scheduled maintenance is due according to the S80FT’s hour meter. | Arrange for routine service to maintain reliability. | |
| Work Lights | BLUE | The forklift’s work lights are currently switched on. | No action needed unless lighting is not required. | |
| Beacon / Rotating Light | AMBER | The safety beacon is active to alert nearby personnel of forklift operation. | No action required; ensure beacon is functioning during operation. | |
| Overload / Capacity | RED | The load being lifted exceeds the rated capacity of the S80FT. | Lower the load immediately and reduce weight to within specifications. | |
| Fasten Seat Belt | AMBER | Operator seat belt is not fastened, disabling travel on the S80FT. | Secure the seat belt before operating the forklift. | |
| Battery Discharge (BDI) | AMBER | The traction battery charge is low (applies to S80FT with battery-powered options). | Plan to recharge or replace the battery soon. | |
| Mast / Lift Limit | AMBER | The mast has reached its maximum lift height or a limit switch has been triggered. | Do not attempt to lift further; lower mast if necessary. |
23 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
For the S80FT, immediately shut down the engine, check oil level and condition, and inspect for leaks or filter blockages before restarting.
Coolant Temperature
Common causes
- Low coolant level
- Radiator blockage
- Failed thermostat or cooling fan
What to do
Stop the S80FT, allow the engine to cool, check coolant reservoir, and inspect radiator and fan operation before resuming use.
Overload / Capacity
Common causes
- Attempting to lift a load above rated capacity
- Incorrect load center
- Unbalanced load placement
What to do
Lower the load immediately; ensure future loads do not exceed the S80FT’s capacity and are positioned correctly on the forks.
Brake System
Common causes
- Hydraulic fluid leak
- Worn brake pads
- Air in brake lines
What to do
Cease operation and have a qualified technician inspect and repair the S80FT’s brake system before returning to service.
Transmission Temp
Common causes
- Low transmission fluid
- Blocked transmission cooler
- Heavy or prolonged operation
What to do
Let the S80FT transmission cool, check fluid level and condition, and clear any debris from the cooler.
Frequently Asked Questions
What should I do if the Master Warning light appears on my Hyster S80FT?
Stop the forklift as soon as it’s safe, investigate the fault shown on the display, and address the issue before continuing operation.
How often should I service the hydraulic system?
Follow the maintenance intervals in the S80FT manual, but always check fluid levels and filter condition if the hydraulic warning light appears.
Can I continue operating if the Check Engine light is on but the forklift seems fine?
It's best to schedule service promptly, as continued use with an engine fault can lead to more serious problems or emissions violations.
Why does the Overload light come on even when the load isn’t heavy?
Check that the load is properly centered and within the rated capacity; uneven or off-center loads can trigger the overload sensor.
What does it mean when the ABS light stays on?
The anti-lock brake system is disabled, so braking performance on slippery surfaces may be reduced; have the ABS checked at the next opportunity.