The Manitou MT 835 telehandler combines lifting power with aerial work platform capability. Its instrument cluster uses color-coded warnings to alert operators to system statuses, from critical engine faults to routine maintenance reminders.
Manitou MT 835 Warning Light Symbols
| Symbol | Name | Color | What it means | What to do |
|---|---|---|---|---|
| Master Warning (Stop) | RED | A critical fault requiring immediate engine shutdown on your MT 835, such as low oil pressure or engine overheating. | Stop the engine safely and investigate the accompanying warning text on the display. | |
| Master Caution | AMBER | A non-critical system issue is active on your MT 835; check the message center for details. | Review the display for related alerts and schedule service if needed. | |
| Check Engine (MIL) | AMBER | The MT 835's engine control unit has detected a fault in emissions or performance systems. | Have the engine diagnosed by a qualified technician promptly. | |
| Engine Oil Pressure | RED | Engine oil pressure is dangerously low; continued operation will damage the MT 835's engine. | Stop the engine immediately and check oil level and pressure. | |
| Battery / Charging | RED | The MT 835's charging system is not working, or battery voltage is low. | Check alternator belt and connections; charge or replace battery. | |
| Coolant Temperature | RED | Engine coolant temperature has exceeded safe limits for the MT 835. | Stop and let engine cool; check coolant level and fan operation. | |
| Transmission Temp | AMBER | Transmission fluid is hotter than normal; reduce load or shift to lower gear on your MT 835. | Allow transmission to cool; check fluid level and condition. | |
| Brake System | RED | A fault in the MT 835's brake system, such as low pressure or worn pads. | Do not operate; have brakes inspected immediately. | |
| Parking Brake | RED | Parking brake is engaged or not fully released on your MT 835. | Release parking brake before moving; if light stays, check switch. | |
| Glow Plug / Preheat | AMBER | Preheating is active for cold-start of the MT 835's diesel engine. | Wait for light to go out before cranking. | |
| DPF / Regeneration | AMBER | The diesel particulate filter on your MT 835 is being regenerated to clean trapped soot. | Keep engine running at safe load to complete regeneration. | |
| Water in Fuel | AMBER | Water has been detected in the MT 835's fuel filter/water separator. | Drain the water separator immediately to prevent injection damage. | |
| Low Fuel | AMBER | Fuel level in the MT 835 tank is low; refuel soon to avoid air in system. | Refuel with diesel as soon as possible. | |
| High Beam | BLUE | High beam headlights are active for improved visibility on your MT 835. | Dim when approaching other vehicles. | |
| Hydraulic System | RED | Hydraulic system fault detected, such as low pressure or overheating on the MT 835. | Stop operations and check hydraulic fluid level and temperature. | |
| Fasten Seat Belt | RED | Seat belt is not fastened; safety system on MT 835 requires it for boom operation. | Fasten seat belt immediately. | |
| Reduced Power (Limp Mode) | AMBER | Engine power is limited to protect the MT 835's drivetrain or emissions system. | Reduce load and travel to service area; check related alerts. | |
| Hydraulic Oil | AMBER | Hydraulic oil level is low or temperature is high on your MT 835. | Check hydraulic oil level and add if needed; allow to cool. | |
| Air Filter | AMBER | Engine air filter is restricted; service required for MT 835. | Replace or clean air filter as per maintenance schedule. | |
| Service / Hour Meter | AMBER | Scheduled maintenance interval is approaching or due on the MT 835. | Perform required service per operator's manual. | |
| Beacon / Rotating Light | GREEN | Warning beacon is active for safety during MT 835 operation. | Ensure beacon is visible; no action required. | |
| Swing / Slew Lock | AMBER | Slew lock is engaged or not fully disengaged on the MT 835's upper structure. | Disengage slew lock before rotating the turret. | |
| Differential Lock | AMBER | Differential lock is engaged for traction on low-grip surfaces in your MT 835. | Disengage for normal driving to prevent driveline binding. | |
| Overload / Capacity | RED | The MT 835 is overloaded beyond rated capacity; stability is compromised. | Immediately reduce load to safe weight. |
24 symbols shown. Icons follow ISO 2575 dashboard standards; exact graphics vary by model year.
Most Important Warning Lights
Engine Overheat in Lift Operation
Common causes
- Coolant leak from radiator
- Thermostat stuck closed
- Cooling fan failure
What to do
Check coolant level, repair leaks, and test fan operation on your MT 835; if persists, replace thermostat.
Transmission Slipping
Common causes
- Low transmission fluid level
- Worn clutch packs
- Solenoid valve malfunction
What to do
Verify fluid level and condition; if low, add approved fluid; if slipping continues, have transmission serviced.
Hydraulic Boom Slow Response
Common causes
- Low hydraulic oil level
- Clogged suction strainer
- Worn hydraulic pump
What to do
Check hydraulic oil level and add if low; inspect and clean strainer; replace pump if output is poor.
DPF Clogged / Regeneration Failed
Common causes
- Frequent short idling
- Excessive soot from poor combustion
- Faulty regeneration sensor
What to do
Perform parked regeneration per MT 835 manual; if fails, have DPF cleaned or replaced by dealer.
Brake Warning Light On After Startup
Common causes
- Low brake fluid reservoir
- Worn brake pads
- Air in brake lines
What to do
Top up brake fluid with DOT 4; inspect pads for wear; bleed brakes to remove air.
Frequently Asked Questions
Why does my MT 835 display a 'Master Warning' but no other lights?
This indicates a critical fault stored in the system; check the message center for details or have the fault codes read with a diagnostic tool.
Can I operate the telehandler with the amber 'Hydraulic Oil' light on?
No, continued operation may damage the hydraulic system. Stop, check oil level and temperature, and allow it to cool before resuming work.
What should I do if the 'Overload' light comes on while lifting?
Immediately lower the load and reposition to reduce leverage; never exceed the rated capacity shown on the load chart.
Why does my DPF regeneration keep stopping before completion?
Regeneration requires a steady engine load and temperature; if the MT 835 is idled or shut off, it may interrupt. Drive at moderate speed until complete.
How do I reset the service hourmeter light on my MT 835?
After performing the scheduled service, the dealer or a technician can reset the interval using the service tool; refer to the operator's manual for specific reset steps.
The 'Check Engine' light came on; is it safe to continue?
If the light is steady, you may continue with reduced power if no other red lights are present; if flashing, stop immediately to prevent catalytic converter damage.