The Liebherr R938 excavator features a comprehensive warning system to keep the operator informed of machine health. Understanding these indicators is crucial for safe and efficient operation in construction and mining environments.
Liebherr R938 Warning Light Symbols
| Symbol | Name | Color | What it means | What to do |
|---|---|---|---|---|
| Master Warning (Stop) | RED | A critical failure has been detected in the R938's engine or hydraulic system. | Stop the engine immediately and consult the service manual. | |
| Master Caution | AMBER | The R938 has detected a non-critical fault that requires attention. | Check the display for fault codes and service when possible. | |
| Check Engine | AMBER | Engine management system has detected an emission or performance issue in the Liebherr engine. | Check engine diagnostics and reduce load until addressed. | |
| Engine Oil Pressure | RED | Low engine oil pressure detected in the R938's diesel engine. | Stop the engine immediately and check oil level and pressure. | |
| Battery Charge | RED | The alternator is not charging the battery on this R938. | Check alternator belt and connections; recharge or replace battery. | |
| Coolant Temperature | RED | Engine coolant temperature is above safe operating level for the R938. | Stop the engine and allow to cool; check coolant level and fan. | |
| Hydraulic System | AMBER | Hydraulic oil temperature or pressure is outside normal range on the R938. | Reduce workload and check hydraulic oil level and cooling. | |
| Swing Lock | GREEN | The swing lock is engaged, preventing upper structure rotation on the R938. | Release swing lock before operating. | |
| Beacon | GREEN | Rotating beacon is activated for visibility on the R938. | Ensure beacon is on when operating in low light or with other personnel. | |
| Work Lights | GREEN | Work lights are turned on for the R938. | Turn off when not needed to conserve battery. | |
| Water in Fuel | AMBER | Water detected in the fuel/water separator of the R938. | Drain water from separator and replace filter if needed. | |
| Air Filter | AMBER | Engine air filter is restricted on the R938. | Clean or replace air filter element. | |
| Fuel Filter / Water Separator | AMBER | Fuel filter requires servicing on the R938. | Replace fuel filter and drain water separator. | |
| Engine Oil Temperature | AMBER | Engine oil temperature is high on the R938. | Reduce engine load and check oil level. | |
| Seat Belt | AMBER | Operator seat belt is not fastened on the R938. | Fasten seat belt before operating. |
15 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
- Fan belt broken or loose
- Coolant pump failure
What to do
On the R938, stop the engine, allow to cool, check coolant level and radiator for debris; inspect fan belt and pump.
Low Engine Oil Pressure
Common causes
- Low oil level
- Oil filter clogged
- Oil pump failure
What to do
Immediately stop the R938 engine, check oil level; if full, have oil pressure tested by a Liebherr service technician.
Hydraulic System Overheat
Common causes
- Heavy continuous use
- Low hydraulic oil level
- Clogged hydraulic oil cooler
What to do
Reduce load on the R938, let hydraulic system cool, check oil level and clean cooler fins.
High Exhaust Temperature
Common causes
- DPF full
- Regeneration issues
- Engine load too high
What to do
On the R938, initiate parked regeneration if safe, or reduce load; if persists, service DPF.
Battery Not Charging
Common causes
- Alternator failure
- Broken wiring
- Battery defective
What to do
Check alternator belt tension and connections on the R938; replace alternator if needed.
Frequently Asked Questions
What does the master warning light mean on the R938?
It indicates a critical fault requiring immediate engine shutdown on the Liebherr R938.
How do I reset the service hour meter?
On the R938, the service reminder is reset via the diagnostics menu after performing maintenance.
Can I operate with the amber check engine light on?
You can continue but reduce load; have the issue diagnosed soon to avoid damage to the R938.
What should I do if the hydraulic system warning comes on?
Reduce workload and check hydraulic oil temperature; if light persists, service the cooling system.
Is it normal for the swing lock light to stay on?
Only if the swing lock is engaged; release the lock to extinguish the light on the R938.
How often should I check the fuel/water separator?
Daily during pre-start inspection on the R938; drain water if indicator light comes on.