The Hyster S120FT is a robust internal combustion forklift designed for heavy-duty material handling in industrial environments. Its instrument cluster provides clear, essential alerts to operators, ensuring the machine remains safe, efficient, and protected against damage during demanding shifts.
Hyster S120FT Warning Light Symbols
| Symbol | Name | Color | What it means | What to do |
|---|---|---|---|---|
| Master Warning (Stop) | RED | A severe fault has been detected in the S120FT's systems that could lead to equipment damage or unsafe operation. | Safely park and shut down the forklift; contact maintenance immediately. | |
| Master Caution | AMBER | A non-critical issue has been identified that may affect the S120FT's performance if ignored. | Check the display for further details and schedule inspection soon. | |
| Check Engine (MIL) | AMBER | The S120FT's engine control unit has logged a fault that could impact emissions or driveability. | Investigate the fault code and arrange for service at the next opportunity. | |
| Engine Oil Pressure | RED | The engine oil pressure in your S120FT has dropped below safe limits, risking engine damage. | Stop the engine immediately and check oil level and leaks. | |
| Battery / Charging | RED | The alternator is not charging the S120FT's battery, risking electrical shutdown. | Inspect the charging system and do not continue operation until resolved. | |
| Coolant Temperature | RED | The engine coolant temperature has exceeded safe levels in the S120FT. | Shut down the engine, allow it to cool, and check coolant level. | |
| Transmission Temp | RED | The transmission fluid temperature in the S120FT is dangerously high. | Stop operation and allow the transmission to cool before proceeding. | |
| Brake System | RED | A fault has been detected in the S120FT's brake system, reducing braking effectiveness. | Cease operation and have the brakes inspected immediately. | |
| ABS | AMBER | The anti-lock braking system on the S120FT is malfunctioning and may not prevent wheel lockup. | Operate with caution and schedule ABS service soon. | |
| Parking Brake | RED | The parking brake is engaged or not fully released on your S120FT. | Release the parking brake before moving the forklift. | |
| Seat Belt | RED | The operator seat belt is not fastened while the S120FT is in use. | Buckle the seat belt to ensure proper safety. | |
| DPF / Regeneration | AMBER | The diesel particulate filter on the S120FT requires regeneration to prevent engine restriction. | Initiate or allow the regeneration process as prompted by the display. | |
| DEF / AdBlue | AMBER | DEF fluid level is low or a fault is detected in the S120FT's emissions system. | Refill DEF tank and check for system errors. | |
| Water in Fuel | AMBER | Water contamination has been detected in the S120FT's fuel system. | Drain the water separator to prevent injector damage. | |
| Low Fuel | AMBER | The S120FT's fuel tank is nearing empty, risking engine shutdown. | Refuel the forklift as soon as possible. | |
| Hydraulic System | AMBER | A hydraulic system fault or low fluid has been detected on the S120FT. | Check hydraulic fluid level and inspect for leaks. | |
| Reduced Power (Limp Mode) | AMBER | The S120FT has entered limp mode due to a serious fault to protect critical systems. | Limit operation and arrange for immediate diagnostics. | |
| Hydraulic Oil | AMBER | Hydraulic oil temperature is elevated or oil level is low in the S120FT. | Allow the system to cool and top up hydraulic oil if needed. | |
| Engine Oil Temperature | RED | Engine oil temperature has exceeded safe limits in the S120FT. | Stop the engine and allow cooling before checking oil. | |
| Air Filter | AMBER | The air filter on the S120FT is clogged, restricting airflow to the engine. | Inspect and replace the air filter soon. | |
| Fuel Filter / Water Separator | AMBER | The fuel filter is restricted or water separator requires draining on the S120FT. | Replace filter or drain water as indicated. | |
| Service / Hour Meter | AMBER | Scheduled maintenance is due based on the S120FT's operating hours. | Arrange for required service at the earliest convenience. | |
| Work Lights | BLUE | The S120FT's work lights are turned on for improved visibility. | No action needed unless lighting is not required. | |
| Beacon / Rotating Light | AMBER | The safety beacon is active, signaling forklift operation in the area. | Ensure beacon is functioning for workplace safety. | |
| Mast / Lift Limit | AMBER | The S120FT has reached its programmed mast or lift height limit. | Do not attempt to lift further; lower or reposition load. | |
| Overload / Capacity | RED | The S120FT is overloaded beyond safe rated capacity. | Lower the load immediately and recheck weight. | |
| Low Oil Level | AMBER | Oil level in the S120FT's engine or hydraulics is below recommended minimum. | Top up with the correct oil type as soon as possible. |
27 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
- Oil filter blockage
What to do
Stop the S120FT immediately, check oil level, and inspect for visible leaks or damaged components before restarting.
Coolant Temperature
Common causes
- Low coolant
- Radiator blockage
- Failed thermostat
What to do
Allow the engine to cool, check coolant level, and inspect the radiator and hoses for blockages or leaks.
Overload / Capacity
Common causes
- Load exceeds forklift rating
- Incorrect load placement
- Faulty load sensor
What to do
Remove excess weight and ensure load is properly positioned within the S120FT's rated capacity.
Brake System
Common causes
- Brake fluid leak
- Worn brake pads
- Hydraulic brake fault
What to do
Do not operate; have the brake system inspected and repaired by qualified personnel before returning to service.
Battery / Charging
Common causes
- Alternator failure
- Loose or corroded battery connections
- Damaged battery
What to do
Inspect the battery and charging system; clean terminals, check belt tension, and replace faulty components as needed.
Frequently Asked Questions
What should I do if the DPF / Regeneration light comes on?
Follow the on-screen instructions to allow or initiate regeneration; avoid shutting off the S120FT until the process completes.
Why does my S120FT enter reduced power (limp) mode?
Limp mode is triggered by serious engine or emissions faults to prevent further damage; have the forklift diagnosed as soon as possible.
How often should I check hydraulic oil on the S120FT?
Check hydraulic oil daily before operation, and top up if the indicator shows low.
What does the lift mast limit light mean?
It signals the mast has reached its maximum programmed height; do not attempt to lift further to avoid mechanical damage.
Is it safe to operate with the ABS light on?
The S120FT can still be used, but anti-lock braking is disabled; drive cautiously and arrange for service.