The Manitou MLT 733 telehandler features a comprehensive instrument cluster designed to keep you informed of machine status and safety. Warning lights are color-coded for quick recognition, and understanding them is essential for safe operation and maintenance.
Manitou MLT 733 Warning Light Symbols
| Symbol | Name | Color | What it means | What to do |
|---|---|---|---|---|
| Master Warning (Stop) | RED | This red alarm illuminates alongside other critical warnings, signaling an immediate stop necessary for the MLT 733 to prevent damage or unsafe conditions. | Stop the engine safely and check the accompanying warning light. | |
| Master Caution | AMBER | An amber caution light that activates with less urgent warnings, reminding the operator of a non-critical issue on the MLT 733. | Consult the display for additional details and address the underlying concern soon. | |
| Check Engine (MIL) | AMBER | This light indicates an engine management fault specific to the MLT 733's diesel engine, often related to emissions or sensor readings. | Have the engine diagnosed by an authorized Manitou technician. | |
| Engine Oil Pressure | RED | Low engine oil pressure detected in the MLT 733's hydraulic system can cause severe damage if ignored. | Stop immediately, check oil level, and inspect for leaks. | |
| Battery / Charging | RED | The charging system voltage is outside normal range, affecting the MLT 733's electrical components and starting ability. | Check alternator belt and battery connections; service if needed. | |
| Coolant Temperature | RED | Engine coolant temperature is too high, risking overheating of the MLT 733's powerplant. | Stop the engine, let it cool, and inspect coolant level and leaks. | |
| Parking Brake | RED | This red indicator shows the parking brake is engaged or a fault exists in the brake system of the MLT 733. | Ensure brake is fully released before moving; if light persists, service is required. | |
| Glow Plug / Preheat | AMBER | This amber light stays on while the preheat system is active in cold conditions on the MLT 733; it turns off when starting is ready. | Wait for the light to go out before cranking the engine. | |
| Low Fuel | AMBER | The fuel level in the MLT 733's tank has dropped to a reserve level, requiring refueling soon. | Refuel as soon as possible to avoid running out. | |
| High Beam | BLUE | Blue indicator confirms the high-beam headlights are activated on the MLT 733 for improved visibility. | Dim to low beam when approaching other vehicles. | |
| Hydraulic System | RED | A critical fault in the hydraulic circuit of the MLT 733, such as low pressure or contamination, demands immediate attention. | Stop machine and check hydraulic fluid level and temperature. | |
| Fasten Seat Belt | RED | This red reminder alerts the operator that the seat belt is not fastened while the MLT 733 is in motion. | Fasten seat belt immediately for safety. | |
| Overload / Capacity | RED | The MLT 733 has exceeded its rated load capacity, risking tip-over or structural failure. | Reduce load immediately to within safe limits. | |
| Mast / Lift Limit | AMBER | The mast or boom has reached its maximum travel limit on the MLT 733, preventing further movement. | Release the control; do not force movement. | |
| Door Open | AMBER | Indicates that the cab door of the MLT 733 is not fully closed. | Close the door securely 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
- Radiator blockage
- Thermostat failure
What to do
Stop the MLT 733 immediately, let engine cool, check coolant reservoir and radiator fins, and contact Manitou service if overheating persists.
Low Oil Pressure
Common causes
- Oil level low
- Oil pump failure
- Worn engine bearings
What to do
Shut down engine, verify oil level on dipstick, and if adequate, have the oil pressure system inspected by a qualified technician.
Hydraulic System Failure
Common causes
- Low hydraulic fluid
- Contaminated fluid
- Relief valve malfunction
What to do
Park the MLT 733 safely, check hydraulic fluid level, and examine for leaks; replace filters if needed and consult the manual.
Brake System Malfunction
Common causes
- Low brake fluid
- Worn brake pads
- Air in brake lines
What to do
Do not operate the MLT 733; check brake fluid reservoir and bleed brakes if necessary, then test functionality before use.
Overload Condition
Common causes
- Exceeding rated capacity
- Uneven load distribution
- Sensor calibration error
What to do
Immediately lower or remove excess load, reposition load evenly, and verify with a scale if available; if light remains, inspect load sensors.
Frequently Asked Questions
What does the red stop light mean on my MLT 733?
The master warning (red stop) indicates a critical issue requiring immediate engine shutdown; always check the secondary warning light for specifics.
Why does the preheat light stay on longer in cold weather?
The MLT 733's glow plug system requires extra time to warm the engine in low temperatures; wait until the light goes out before starting.
Can I continue working with the amber caution light on?
You can operate cautiously, but the amber caution signals a non-urgent problem that should be diagnosed soon to avoid escalation.
How do I reset the service hour meter light?
The service indicator is based on engine hours; after performing maintenance, an authorized dealer can reset it using the diagnostic tool.
What should I do if the overload light activates during a lift?
Carefully lower the load and reduce weight; the MLT 733's overload system prevents unsafe operation, so never bypass it.
Is the hydraulic light always red?
Yes, the hydraulic system warning is red because any fault can lead to loss of control; stop and inspect hydraulic fluid immediately.