The New Holland T4.110 tractor features a comprehensive instrument cluster with warning lights for critical systems. Understanding these indicators is essential for safe operation and preventing costly repairs.
New Holland T4.110 Warning Light Symbols
| Symbol | Name | Color | What it means | What to do |
|---|---|---|---|---|
| Master Warning (Stop) | RED | A critical system failure has occurred on your T4.110, requiring immediate engine shutdown. | Stop the tractor safely, shut off the engine, and consult the operator's manual. | |
| Master Caution | AMBER | A non-critical fault is detected in one of the T4.110's systems; check the display for details. | Review the information display and address the indicated issue soon. | |
| Check Engine (MIL) | AMBER | The engine control unit on your T4.110 has detected a fault in emissions or performance systems. | Schedule service to diagnose and repair the engine issue. | |
| Engine Oil Pressure | RED | Engine oil pressure in your T4.110 is dangerously low, risking severe engine damage. | Stop the engine immediately and check oil level and pressure sender. | |
| Battery / Charging | RED | The T4.110's charging system is failing; battery voltage may be too low. | Check alternator belt and connections; charge or replace battery if needed. | |
| Coolant Temperature | RED | Engine coolant temperature in the T4.110 has exceeded safe limits. | Stop the engine, let it cool, and check coolant level and fan operation. | |
| Transmission Temp | RED | Transmission fluid temperature on the T4.110 is too high, risking damage. | Reduce load or stop to allow cooling; check transmission oil level. | |
| Parking Brake | RED | Parking brake is engaged on your T4.110, or a fault exists in the brake system. | Release the parking brake before moving; if light stays, inspect brake system. | |
| Glow Plug / Preheat | AMBER | The glow plugs in your T4.110 are preheating for cold start in low temperatures. | Wait until the light turns off before starting the engine. | |
| DPF / Regeneration | AMBER | The Diesel Particulate Filter on your T4.110 needs regeneration, either active or passive. | Operate the tractor at high engine load to facilitate regeneration, or perform parked regen. | |
| DEF / AdBlue | AMBER | AdBlue level in your T4.110 is low, or quality is poor, affecting emissions. | Refill DEF tank with certified AdBlue fluid. | |
| Water in Fuel | AMBER | Water has accumulated in the fuel filter/water separator of your T4.110. | Drain the water separator immediately to prevent injection damage. | |
| Low Fuel | AMBER | Fuel level in the T4.110 tank is low, requiring refueling soon. | Refill the fuel tank with clean diesel. | |
| High Beam | BLUE | High beam headlights are activated on your T4.110. | Dip the lights when approaching other vehicles. | |
| PTO Engaged | GREEN | The Power Take-Off is engaged and rotating on your T4.110. | Disengage PTO before stopping or servicing implements. | |
| Differential Lock | GREEN | The differential lock on your T4.110 is engaged for increased traction. | Disengage when turning or on hard surfaces to avoid driveline stress. | |
| Hydraulic Oil | AMBER | Hydraulic oil level is low or temperature is high on your T4.110. | Check hydraulic oil level and ensure no leaks. | |
| Engine Oil Temperature | AMBER | Engine oil temperature in the T4.110 is above normal operating range. | Reduce engine load and allow oil to cool; check oil level. | |
| Air Filter | AMBER | Air filter restriction on your T4.110 is high, reducing engine performance. | Clean or replace the engine air filter. | |
| Service / Hour Meter | AMBER | Scheduled maintenance interval on your T4.110 is approaching or due. | Perform the required service per operator's manual. | |
| Work Lights | BLUE | Rear or front work lights are on for your T4.110. | Turn off work lights when not needed to conserve battery. | |
| Beacon / Rotating Light | AMBER | The amber beacon on your T4.110 is active to warn others. | Activate beacon when operating on roads or in hazardous areas. |
22 symbols shown. Icons follow ISO 2575 dashboard standards; exact graphics vary by model year.
Most Important Warning Lights
Engine Coolant Overheating
Common causes
- Low coolant level
- Radiator blockage
- Thermostat failure
What to do
Stop the engine, allow it to cool, then check coolant level and radiator fins for debris. On the T4.110, ensure the radiator screen is clean; if overheating persists, have the cooling system inspected.
Low Engine Oil Pressure
Common causes
- Low oil level
- Oil pump failure
- Worn engine bearings
What to do
Immediately stop the engine on your T4.110 and check engine oil level with the dipstick. If oil is low, add recommended grade; if light remains, do not operate and contact a New Holland dealer.
Transmission Overheating
Common causes
- Low transmission fluid
- Overloading
- Clogged transmission cooler
What to do
Reduce engine load and transmission speed; check transmission fluid level with the tractor on level ground. On the T4.110, clean the cooler fins and ensure proper fluid type.
DPF Regeneration Required
Common causes
- Frequent low-load operation
- Soot buildup
- Faulty regeneration system
What to do
Drive the T4.110 at high engine load (e.g., PTO work) to initiate passive regeneration. If warning persists, perform a parked regeneration via the display; if unsuccessful, visit a dealer.
Water in Fuel
Common causes
- Contaminated fuel
- Condensation in tank
- Faulty filter seal
What to do
Drain the water separator located on the left side of the engine on the T4.110. Loosen the drain valve until clear fuel flows; if light stays, replace the fuel filter.
Frequently Asked Questions
Why won't my T4.110 start and the glow plug light flashes?
This indicates a glow plug fault. The T4.110 requires functional glow plugs for cold starts. Check the glow plug relay and individual plugs; consult your dealer for diagnosis.
How often should I regenerate the DPF on the T4.110?
Regeneration occurs automatically during heavy work. If you do frequent light work, the DPF light may illuminate; perform a parked regeneration as instructed in the operator's manual.
What does the amber master caution light mean?
It alerts you to a non-critical issue in the T4.110's systems. Use the display information center to identify the specific fault, such as low DEF or hydraulic oil level.
Can I ignore the water in fuel warning briefly?
No. Water can damage the injection system. Drain the separator immediately; the T4.110's fuel system is sensitive to water, so address it right away.
Where is the DEF tank on the T4.110?
The DEF (AdBlue) tank is located on the right side of the tractor, behind the steps. It holds about 5 gallons and should be refilled with clean, certified fluid.
What should I do if the transmission temperature light comes on while baling?
Reduce the load by slowing down or lowering the PTO speed. Stop and let the transmission cool. On the T4.110, check the transmission oil level and cooler cleanliness.