The Bobcat S150 skid steer loader uses a straightforward warning light system to monitor engine, hydraulic, and safety systems. Understanding these lights is crucial for preventing damage and ensuring safe operation. This guide covers the most common indicators specific to the S150.
Bobcat S150 Warning Light Symbols
| Symbol | Name | Color | What it means | What to do |
|---|---|---|---|---|
| Master Warning (Stop) | RED | A critical fault has occurred—typical on S150 for engine or hydraulic system failure. | Stop the engine immediately and consult the service manual. | |
| Master Caution | AMBER | A non-critical fault or maintenance reminder is present on your S150. | Check the display or light stack for secondary warnings. | |
| Check Engine (MIL) | AMBER | The engine control module on the S150 has detected a fault. | Have the engine diagnosed; continued operation may reduce power. | |
| Engine Oil Pressure | RED | Engine oil pressure is too low, risking internal damage on your S150. | Shut off engine and check oil level and filter. | |
| Battery / Charging | RED | The charging system is not charging the battery on this S150. | Check alternator belt and connections; possible battery replacement. | |
| Coolant Temperature | RED | Engine coolant is overheating on your Bobcat S150. | Stop engine, let cool, check coolant level and radiator. | |
| Hydraulic System | AMBER | Hydraulic oil temperature or level is outside normal range on the S150. | Check hydraulic oil level and cool down if hot. | |
| Parking Brake | RED | Parking brake is engaged on your S150. | Release parking brake before moving. | |
| Seat Belt | RED | Operator seat belt is not fastened on the S150. | Fasten seat belt to enable machine operation. | |
| Glow Plug / Preheat | AMBER | Glow plugs are active to aid cold starting on your S150. | Wait for light to turn off before cranking. | |
| Low Fuel | AMBER | Fuel level is low in the S150's tank. | Refuel as soon as possible to avoid air in system. | |
| High Beam | BLUE | High beam headlights are on for your S150. | Dim when other vehicles are nearby. | |
| Work Lights | GREEN | Work lights are illuminated for your S150. | Turn off when not needed to save battery. | |
| Service / Hour Meter | GREEN | Indicates time for scheduled maintenance on the S150. | Perform required service as per operator's manual. | |
| Air Filter | AMBER | Air intake filter is clogged on your S150. | Clean or replace air filter element. | |
| Water in Fuel | AMBER | Water has accumulated in the fuel filter/separator on the S150. | Drain water from fuel filter bowl. | |
| Low Oil Level | AMBER | Engine oil level is low on your Bobcat S150. | Add oil to recommended level. | |
| Reduced Power (Limp Mode) | AMBER | Engine power is limited to protect the system on the S150. | Have the fault diagnosed; operation possible at reduced speed. |
18 symbols shown. Icons follow ISO 2575 dashboard standards; exact graphics vary by model year.
Most Important Warning Lights
Low Engine Oil Pressure
Common causes
- Low oil level
- Oil pump failure
- Clogged oil filter
What to do
On your S150, immediately stop the engine. Check oil level and top off if needed. If light stays on, inspect oil filter and pump.
Engine Overheating
Common causes
- Low coolant level
- Radiator blockage
- Faulty thermostat
What to do
Shut off the S150 and allow it to cool. Check coolant level and add as required. Clean radiator fins of debris.
Hydraulic System Failure
Common causes
- Low hydraulic oil
- Hydraulic pump failure
- Blocked filter
What to do
Stop the machine and check hydraulic oil level in the reservoir. If low, add the correct oil. Have the pump and filter inspected by a technician.
Battery/Charging System Failure
Common causes
- Loose alternator belt
- Worn alternator
- Battery terminal corrosion
What to do
Check belt tension and battery connections on your S150. If the red light stays on, replace the alternator or battery as needed.
Check Engine Light with Power Loss
Common causes
- Fuel filter clogging
- Injector issue
- Sensor malfunction
What to do
The S150 may enter limp mode. Have the engine codes read by a Bobcat dealer to pinpoint and repair the fault.
Frequently Asked Questions
What does the red stop light mean on my Bobcat S150?
The red master warning light means a critical fault (like low oil pressure or overheating) has occurred. Stop the engine immediately and check the corresponding system.
Why is my amber caution light on while operating?
The amber caution light on the S150 indicates a non-urgent issue such as low fuel, high hydraulic temperature, or a service reminder. Check the other indicator lights for specifics.
Can I continue working if the check engine light is on?
You can continue with reduced power, but have the S150 diagnosed soon to avoid further damage and emission issues.
How do I reset the hour meter maintenance light?
After performing the required service, press and hold the hour meter reset button (if equipped) or use the diagnostic tool to clear the reminder on your S150.
What should I do if the hydraulic light comes on?
The hydraulic light on the S150 warns of high temperature or low level. Let the machine idle to cool, and check hydraulic oil level in the reservoir.
Why does my glow plug light stay on longer in cold weather?
The glow plug light on the S150 remains on longer in cold temperatures to ensure proper preheating for starting. Wait for it to turn off before cranking.