The Yanmar ViO35-6A is a compact excavator equipped with a Yanmar 3TNV88F diesel engine and a powerful hydraulic system. Its instrument cluster provides critical warnings to ensure safe operation and prevent damage. This guide explains each indicator light specific to this model.
Yanmar ViO35-6A Warning Light Symbols
| Symbol | Name | Color | What it means | What to do |
|---|---|---|---|---|
| Master Warning (Stop) | RED | This red light illuminates when a critical fault is detected in the Yanmar ViO35-6A's engine or hydraulic system, such as low oil pressure or overheating. | Stop the engine immediately, check the error code on the display, and consult the service manual. | |
| Master Caution | AMBER | This amber light indicates a non-critical issue that requires attention, like a clogged air filter or low hydraulic oil level on the ViO35-6A. | Check the message center and address the specific warning; continue operation if safe. | |
| Check Engine (MIL) | AMBER | This light signals a fault in the ViO35-6A's electronic engine management system, potentially affecting emissions or performance. | Have the engine diagnosed by a Yanmar dealer to read the fault code. | |
| Engine Oil Pressure | RED | When lit, the engine oil pressure in the ViO35-6A's Yanmar 3TNV88F engine has dropped below safe levels, risking severe damage. | Stop the engine immediately, check oil level and pressure sensor. | |
| Battery / Charging | RED | This red light indicates the ViO35-6A's alternator is not charging the battery, or the charging voltage is out of range. | Check alternator belt and connections; if persists, replace alternator or battery. | |
| Coolant Temperature | RED | The engine coolant temperature in the ViO35-6A has exceeded the safe limit, typically above 110°C, risking overheating damage. | Stop the engine, let it cool, check coolant level and radiator for blockages. | |
| Hydraulic System | AMBER | This amber light warns of a hydraulic issue on the ViO35-6A, such as low fluid level or a clogged filter, affecting implement operation. | Check hydraulic oil level and filter; inspect for leaks. | |
| Glow Plug / Preheat | AMBER | This indicator shows the preheat system is active on the ViO35-6A's diesel engine; it turns off when the engine is ready to start. | Wait for the light to turn off before cranking the engine. | |
| Water in Fuel | AMBER | The water separator in the ViO35-6A's fuel system has detected water, which can damage the injection pump. | Drain the water separator immediately; check for contaminated fuel. | |
| Low Fuel | AMBER | The fuel level in the ViO35-6A's tank is low; approximately 1/8 remaining. | Refuel as soon as possible to avoid air ingress in the fuel system. | |
| Service / Hour Meter | AMBER | This amber reminder indicates that the ViO35-6A is due for scheduled maintenance (e.g., engine oil change or filter replacement). | Perform the required service based on the hour interval (e.g., every 250 hours). | |
| Work Lights | GREEN | This green light confirms the work lights on the ViO35-6A are turned on, providing illumination for low-light operation. | No action needed; if lights are off and indicator is on, check bulb or wiring. | |
| Swing / Slew Lock | AMBER | The swing lock mechanism on the ViO35-6A is engaged, preventing the upper structure from rotating. | Release the swing lock before operating the swing function. | |
| Air Filter | AMBER | The engine air filter on the ViO35-6A is clogged, reducing airflow and engine power. | Clean or replace the air filter element. | |
| Fuel Filter / Water Separator | AMBER | This amber light indicates the fuel filter requires servicing or the water separator needs draining on the ViO35-6A. | Replace the fuel filter and drain the water separator. | |
| Engine Oil Temperature | RED | The engine oil temperature in the ViO35-6A is critically high, exceeding normal operating range. | Stop the engine and allow it to cool; check oil level and cooling system. | |
| Low Oil Level | AMBER | The engine oil level in the ViO35-6A's crankcase is low, requiring top-up to prevent damage. | Add recommended engine oil (e.g., SAE 10W-30) to the correct level. | |
| Beacon / Rotating Light | GREEN | The rotating beacon on the ViO35-6A is active, indicating the machine is in motion or worksite visibility is needed. | No action needed; ensure beacon is working for safety. |
18 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
- Radiator blockage
- Faulty thermostat
What to do
Stop the Yanmar ViO35-6A immediately. Check coolant level after engine cools, clean radiator fins, and inspect the water pump belt tension.
Low Engine Oil Pressure
Common causes
- Low oil level
- Oil pump failure
- Clogged oil filter
What to do
Shut down the ViO35-6A engine at once. Check oil level and top up with 10W-30; if pressure remains low, replace oil filter and inspect oil pressure switch.
Hydraulic System Failure
Common causes
- Low hydraulic oil
- Contaminated oil
- Clogged filter
What to do
Stop operation and check the hydraulic oil level in the ViO35-6A's tank. Drain water or replace oil if contaminated, and replace the hydraulic return filter.
Charging System Fault
Common causes
- Loose alternator belt
- Failed alternator
- Battery connection corrosion
What to do
Check the alternator belt tension on the ViO35-6A's 3TNV88F engine. Clean battery terminals; if light persists, test alternator output (should be ~14V).
Frequently Asked Questions
What does the master warning (stop) light mean on the ViO35-6A?
It indicates a critical fault that requires immediate engine shutdown, such as low oil pressure or high coolant temperature. Check the display for an error code.
How often should I change the hydraulic oil in my ViO35-6A?
Yanmar recommends replacing the hydraulic oil every 1000 hours or annually, whichever comes first, and using Yanmar genuine hydraulic fluid.
Can I operate the ViO35-6A with the master caution light on?
Yes, but only if the underlying issue (e.g., low fuel or clogged air filter) does not affect safety. Address the warning promptly to prevent damage.
Why is my glow plug light staying on longer than usual?
This could indicate a faulty glow plug or relay. On the ViO35-6A, the preheat time varies with ambient temperature; if it exceeds 30 seconds, have it inspected.
What type of engine oil does the ViO35-6A use?
It uses SAE 10W-30 or 15W-40 (API CI-4 or higher) oil. Check the dipstick regularly and maintain the level between marks.
How do I reset the service hour meter on the ViO35-6A?
The service reminder resets automatically after the dealer performs an oil change via the service tool. You cannot manually reset it from the cluster.