The Komatsu SK714 skid steer loader uses a comprehensive warning system to keep you informed of machine health and operational status. Understanding these indicators is crucial for safe and efficient operation. This guide explains common warning lights, their meanings, and recommended actions specific to the SK714.
Komatsu SK714 Warning Light Symbols
| Symbol | Name | Color | What it means | What to do |
|---|---|---|---|---|
| Master Warning (Stop) | RED | This red light illuminates alongside other critical warnings on the SK714 when a serious fault requires engine shutdown. | Stop the engine immediately and consult the operator's manual or contact Komatsu service. | |
| Master Caution | AMBER | Amber caution light activates for non-critical issues needing attention during SK714 operation. | Check the accompanying warning symbol and address the specific system within the next operating cycle. | |
| Check Engine (MIL) | AMBER | The SK714's engine control unit detects a fault in the emissions or management system. | Reduce load and have the engine diagnosed by a qualified technician soon. | |
| Engine Oil Pressure | RED | This red light warns that oil pressure in the SK714's engine is dangerously low. | Stop the engine immediately and check oil level and pressure sensor. | |
| Battery / Charging | RED | Indicates the SK714's charging system is not providing sufficient voltage to the battery. | Check alternator belt tension and battery connections; if persists, service the charging system. | |
| Coolant Temperature | RED | Engine coolant temperature in the SK714 has exceeded safe operating limits. | Stop engine, let cool, check coolant level and radiator for blockages. | |
| Transmission Temp | AMBER | Transmission fluid temperature in the SK714 is higher than normal. | Reduce load and allow transmission to cool; check fluid level and cooler. | |
| Brake System | RED | Indicates a fault in the SK714's brake system, potentially low pressure or worn pads. | Do not operate; inspect brake fluid level and brake components. | |
| Parking Brake | RED | This light on the SK714 indicates the parking brake is engaged or not fully released. | Ensure parking brake is fully released before moving; if light stays on, inspect switch. | |
| Seat Belt | RED | Reminds the operator of the SK714 that the seat belt is not fastened. | Fasten seat belt before operating the machine. | |
| Glow Plug / Preheat | AMBER | This amber light on the SK714 indicates the engine preheat cycle is active. | Wait for the light to turn off before starting the engine. | |
| Water in Fuel | AMBER | Moisture has been detected in the SK714's fuel system, possibly in the water separator. | Drain the fuel water separator as soon as possible to prevent injection damage. | |
| Low Fuel | AMBER | The fuel level in the SK714's tank is low and refueling is needed. | Refuel with clean diesel to avoid air ingress and downtime. | |
| High Beam | BLUE | Indicates the high beam headlights are on for improved visibility on the SK714. | Dim when approaching other vehicles to avoid glare. | |
| Hydraulic System | RED | A serious fault in the SK714's hydraulic system, such as low pressure or overheating. | Stop the machine immediately and check hydraulic oil level and temperature. | |
| Hydraulic Oil | AMBER | Hydraulic oil level in the SK714 is low or temperature is elevated. | Top up hydraulic fluid with recommended oil; check for leaks. | |
| Air Filter | AMBER | The engine air filter on the SK714 is clogged and needs replacement. | Replace the air filter element to maintain engine performance. | |
| Service / Hour Meter | AMBER | Reminds the SK714 operator that scheduled maintenance is due based on operating hours. | Perform the required service per the maintenance schedule. | |
| Work Lights | GREEN | Indicates the work lights on the SK714 are turned on for better visibility at the job site. | Turn off when not needed to conserve battery. | |
| Beacon / Rotating Light | GREEN | The rotating beacon on the SK714 is active, alerting nearby personnel of machine movement. | Ensure beacon is functioning and visible before operating in busy areas. |
20 symbols shown. Icons follow ISO 2575 dashboard standards; exact graphics vary by model year.
Most Important Warning Lights
Engine Overheating
Common causes
- Low coolant level
- Blocked radiator
- Faulty thermostat
What to do
Stop the SK714 immediately, let the engine cool for at least 15 minutes, then check coolant level and radiator fins for debris. If recurring, have the cooling system inspected by a Komatsu dealer.
Hydraulic System Failure
Common causes
- Low hydraulic oil level
- Contaminated hydraulic fluid
- Hydraulic pump damage
What to do
Shut down the SK714 and check the hydraulic oil level and condition. Look for external leaks at hoses and cylinders. If low, refill with Komatsu genuine hydraulic oil; if contamination is visible, flush the system.
Charging System Fault
Common causes
- Loose alternator belt
- Failed alternator
- Battery terminal corrosion
What to do
Inspect the alternator belt tension and tighten if loose. Clean battery terminals and check connections. If the red battery light remains on after restart, replace the alternator as soon as possible.
Engine Oil Pressure Loss
Common causes
- Low oil level
- Oil pump failure
- Clogged oil filter
What to do
Stop the SK714 engine immediately. Check oil level with dipstick; add oil if low. If level is fine, do not restart—tow to a service center for oil pump and filter inspection.
Brake System Malfunction
Common causes
- Low brake fluid
- Worn brake pads
- Air in brake lines
What to do
Do not operate the SK714. Check brake fluid reservoir level and top up if needed. If pedal feels spongy, bleed the brake system. For worn pads, replace both sides.
Frequently Asked Questions
Why does the Master Warning light come on intermittently on my SK714?
Intermittent master warning often indicates a sensor that has self-cleared after a temporary condition, such as a brief overheat or low oil pressure event. Check the system that triggered it (e.g., coolant temp or oil pressure) and monitor for recurrence; if frequent, consult a Komatsu technician.
Can I continue working if the Check Engine light is amber on the SK714?
An amber check engine light means a non-critical fault, but continued operation may reduce fuel efficiency or cause further damage. Complete your current task, then schedule a diagnostic as soon as possible. Avoid heavy loads until the issue is resolved.
What does the Water in Fuel light indicate on the SK714?
This light alerts you that water has accumulated in the fuel/water separator. Drain the separator by opening the petcock at the bottom until clean fuel flows. If the light stays on, the sensor may be faulty or water is still present.
How do I reset the Service Hour Meter on the Komatsu SK714?
The service hour meter cannot be reset by the operator; it triggers based on elapsed engine hours. Once the required maintenance is performed, a dealer can reset the interval reminder. Record the task performed and hours for warranty purposes.
Why does the Hydraulic Oil light flash when the SK714 is cold?
Cold hydraulic oil is thicker and can cause a momentary low-pressure condition upon startup. Allow the machine to warm up at low idle for 5 minutes. If the light persists, check the oil level and consider a lighter viscosity oil per the manual.
What should I do if the Parking Brake light stays on while driving the SK714?
First, ensure the parking brake lever is fully released. If the light remains on, the parking brake switch may be stuck or the brake is partially engaged. Stop the machine in a safe area and inspect the linkage; clean or lubricate as needed.