The Komatsu SK1020 compact track loader features a robust instrument cluster designed for quick diagnostics and safe operation. Warning lights are color-coded to indicate urgency: red for immediate stop, amber for caution, green/blue for active functions.
Komatsu SK1020 Warning Light Symbols
| Symbol | Name | Color | What it means | What to do |
|---|---|---|---|---|
| Master Warning | RED | A critical system failure is detected, such as low engine oil pressure or overheating. | Stop the engine immediately and consult the operator's manual. | |
| Master Caution | AMBER | A non-critical issue requires attention, such as a clogged air filter or low hydraulic fluid. | Check corresponding warning lights and address the issue soon. | |
| Check Engine | AMBER | Engine management system has detected a malfunction affecting emissions or performance. | Contact your Komatsu dealer for diagnostic troubleshooting. | |
| Engine Oil Pressure | RED | Engine oil pressure is critically low, risking severe internal damage. | Stop the engine and check oil level; if full, call for service. | |
| Battery Charge | RED | Charging system is not producing sufficient voltage to maintain battery. | Inspect alternator belt and wiring; replace battery if necessary. | |
| Coolant Temperature | RED | Engine coolant temperature has exceeded safe operating range. | Let engine idle to cool, then check coolant level and radiator for blockages. | |
| Hydraulic Oil Temperature | RED | Hydraulic system oil is overheating, reducing performance and risking component wear. | Reduce load and allow hydraulic system to cool; check oil level and cooler. | |
| Glow Plug Preheat | AMBER | Glow plugs are active to aid cold starting; wait for light to extinguish. | Turn key to preheat position and wait until light goes out before cranking. | |
| Seat Belt | RED | Operator seat belt is not fastened; loader will not allow hydraulic functions. | Fasten seat belt to enable operation. | |
| Parking Brake | AMBER | Parking brake is engaged; operation is restricted until released. | Release parking brake before moving the machine. | |
| Low Fuel | AMBER | Fuel level is low; refill to avoid running out and drawing air into the system. | Add diesel fuel as soon as possible. | |
| Water in Fuel | AMBER | Water has accumulated in the fuel filter/water separator, risking injector damage. | Drain the water separator bowl immediately. | |
| Air Filter Restriction | AMBER | Engine air filter is clogged, reducing power and fuel economy. | Clean or replace the air filter element. | |
| Service Interval | AMBER | Scheduled maintenance is due based on operating hours. | Perform required service per Komatsu maintenance schedule. | |
| Reduced Power | AMBER | Engine power is automatically limited to protect the system from damage. | Identify root cause using other warning lights and contact service. | |
| Work Lights | GREEN | Work lights are switched on for improved visibility. | No action required; lights are operational. | |
| High Beam | BLUE | High beam headlights are activated for enhanced forward lighting. | Dim when approaching other vehicles or personnel. |
17 symbols shown. Icons follow ISO 2575 dashboard standards; exact graphics vary by model year.
Most Important Warning Lights
Engine Overheat
Common causes
- Low coolant level
- Radiator blockage
- Faulty cooling fan
What to do
On the SK1020, let the engine idle to cool, then check coolant reservoir and radiator for debris. Do not open cap when hot.
Hydraulic Overheat
Common causes
- Excessive continuous operation
- Low hydraulic oil level
- Clogged hydraulic oil cooler
What to do
Reduce load and allow the SK1020's hydraulic system to cool; inspect oil level and clean cooler fins with compressed air.
Engine Won't Start
Common causes
- Low battery voltage
- Faulty glow plug system
- Fuel system air or water
What to do
Check battery connections, ensure glow plug light went out, and drain water from fuel separator on the SK1020.
Reduced Power or Limp Mode
Common causes
- Clogged air filter
- Engine oil pressure issue
- Transmission fault
What to do
Replace air filter, verify oil level, and if persists, contact a Komatsu technician to read fault codes.
Frequently Asked Questions
Why does the master warning light come on and the engine dies?
This indicates a critical fault like low oil pressure or overheat. For the SK1020, likely causes are low hydraulic or engine oil level; shut down and check levels before restarting.
How do I reset the service interval light on the SK1020?
Turn the key to ON, press and hold the service reset button (located near the hour meter) for 5 seconds until the light flashes, then release.
What should I do if the glow plug light stays on after starting?
If the light remains on while the engine is running on your SK1020, it may indicate a faulty glow plug relay or heater circuit; schedule service.
Can I operate the SK1020 with the reduced power light on?
Yes, but only at low loads. The machine limits power to prevent damage. Have the issue diagnosed soon by a dealer.
Why does the water in fuel light come on intermittently?
The SK1020's fuel system may have accumulated moisture. Drain the separator daily; if it persists, check for fuel contamination.
What does the brake system light indicate on my SK1020?
It warns of low brake fluid or parking brake engaged. Check fluid reservoir and release parking brake; if light stays, inspect for leaks.