The Manitou MLT 625 telehandler's instrument cluster provides critical operational data for safe and efficient material handling. This guide explains the warning lights and indicators specific to the MLT 625, helping operators respond correctly to alerts.
Manitou MLT 625 Warning Light Symbols
| Symbol | Name | Color | What it means | What to do |
|---|---|---|---|---|
| Master Warning (Stop) | RED | A critical system failure has occurred—stop the MLT 625 safely and shut down the engine. | Stop the machine immediately, engage parking brake, and consult the diagnostic display. | |
| Master Caution | AMBER | One or more non-critical systems require attention on your MLT 625. | Check the message center for specific alerts and address as needed. | |
| Check Engine (MIL) | AMBER | The engine management system detected a fault—continuing operation may cause damage. | Reduce load and operate at low RPM; service the engine at a Manitou dealer. | |
| Engine Oil Pressure | RED | Oil pressure is below safe level; engine damage is imminent on the MLT 625. | Stop the engine immediately and check oil level. | |
| Battery / Charging | RED | The charging system is failing, battery voltage is low on your MLT 625. | Check alternator belt and battery connections; drive only to service area. | |
| Coolant Temperature | RED | Engine coolant is overheating—risk of engine seizure on the MLT 625. | Stop engine, let cool, check coolant level and radiator for debris. | |
| Transmission Temp | AMBER | Transmission fluid is hot; prolonged operation may damage the MLT 625 drive train. | Reduce load and speed; stop and idle to cool if possible. | |
| Parking Brake | RED | Parking brake is engaged or a fault exists in the brake system. | Release the parking brake before moving; if light stays on, check brake system. | |
| Glow Plug / Preheat | AMBER | Engine preheat is active for cold start on the MLT 625. | Wait until light turns off before cranking the engine. | |
| DPF / Regeneration | AMBER | Diesel particulate filter needs regeneration; may reduce engine power. | Perform a parked regen in a safe area following Manitou procedures. | |
| DEF / AdBlue | AMBER | AdBlue level is low or quality is poor—emissions control affected on the MLT 625. | Top up AdBlue tank with approved fluid immediately. | |
| Water in Fuel | AMBER | Water detected in the fuel system; risk of injection damage on the MLT 625. | Drain the water separator and refill with clean diesel. | |
| Low Fuel | AMBER | Fuel level is low—range limited on the MLT 625. | Refuel as soon as possible to avoid air in system. | |
| High Beam | BLUE | High beam headlights are activated on your MLT 625. | Dim when approaching other vehicles or personnel. | |
| Hydraulic System | RED | Hydraulic system pressure or temperature is abnormal; lift functions may fail. | Stop using attachments; check hydraulic oil level and for leaks. | |
| Fasten Seat Belt | RED | The operator's seat belt is not fastened—safety critical on the MLT 625. | Fasten your seat belt immediately. | |
| Work Lights | GREEN | Work lights are turned on for improved visibility around the MLT 625. | Turn off when not needed to save battery. | |
| Beacon / Rotating Light | GREEN | The rotating beacon is active, indicating the MLT 625 is in operation. | Ensure beacon is on when moving or lifting in public areas. | |
| Swing / Slew Lock | AMBER | The boom swing lock is engaged to prevent unintended movement during transport. | Release swing lock before boom operation. | |
| Differential Lock | AMBER | Differential lock is engaged for improved traction on the MLT 625. | Disengage on hard surfaces to prevent driveline damage. | |
| PTO Engaged | GREEN | Power take-off is active for auxiliary hydraulic functions. | Disengage PTO when not using attachments. | |
| Overload / Capacity | RED | Load exceeds rated capacity or stability limit on the MLT 625. | Lower and reduce load immediately to prevent tipping. | |
| Mast / Lift Limit | AMBER | Lift height or reach limit approached on the MLT 625. | Operate within rated envelope; retract boom if necessary. | |
| Low Oil Level | AMBER | Engine oil level is below minimum for safe operation on the MLT 625. | Check and add oil to correct level. | |
| Brake Fluid Level | RED | Brake fluid level is low—brake failure possible on the MLT 625. | Check brake fluid reservoir; top up and inspect for leaks. |
25 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
Stop the MLT 625 and allow the engine to cool. Check coolant level and add if low. Clean radiator exterior and verify fan operation; if persistent, contact Manitou service.
Hydraulic System Failure
Common causes
- Low hydraulic oil
- Leak in hydraulic line
- Pump malfunction
What to do
Immediately lower attachments to ground and shut down. Check hydraulic oil level and refill if low. Inspect for visible leaks; do not operate until repaired by a Manitou technician.
Transmission Overheat
Common causes
- Extended low-speed operation under heavy load
- Low transmission fluid
- Clogged cooler
What to do
Reduce load and stop the MLT 625. Allow transmission to idle in neutral to cool. Check fluid level and condition; clean transmission cooler fins. Seek dealer if recurring.
Charging System Failure
Common causes
- Broken alternator belt
- Faulty alternator
- Battery connection corrosion
What to do
Stop the engine. Inspect alternator belt tension and condition; tighten or replace if needed. Check battery terminals for corrosion. If belt is fine, test alternator output—requires dealer repair.
Parking Brake Stuck
Common causes
- Corroded brake cable
- Brake adjustment issue
- Electrical solenoid fault
What to do
Attempt to release and re-engage parking brake several times. Visually check cable linkage under the MLT 625 for obstruction. If light remains on, the machine must be towed to a Manitou service center.
Frequently Asked Questions
What does the amber 'wrench' light mean on my MLT 625?
That is the Master Caution—it indicates a non-critical fault. Check the LCD display for specific messages like low DEF or a clogged air filter.
Why does the engine stop after a few seconds?
This is likely the low oil pressure safety shutdown. Check the engine oil level immediately; never restart without verifying oil is at the correct level on your MLT 625.
How do I perform a parked regeneration on the MLT 625?
Park the machine on flat ground, engage parking brake, and press the DPF regen switch (usually on the dashboard). Keep the engine at idle until the process completes (about 20-30 minutes). Avoid stopping the regen prematurely.
The 'overload' light is flashing but I have no load—what's wrong?
The overload sensor may be miscalibrated or the boom is at a steep angle. Try retracting the boom fully and lowering attachments. If the light persists, the load moment indicator needs recalibration by a dealer.
Can I drive the MLT 625 with the 'check engine' light on steady?
You can operate at reduced power, but avoid heavy lifts. Have the fault diagnosed soon; continuing may cause emissions system damage or reduced performance.
What does the blue 'beacon' indicator mean?
It simply confirms the rotating beacon is turned on. It's required when operating in low visibility or public areas to alert others of the MLT 625's presence.