The Merlo TF35.7 compact telehandler features a comprehensive digital display with warning lights essential for safe operation. This guide explains each indicator's color and meaning specifically for this model.
Merlo TF35.7 Warning Light Symbols
| Symbol | Name | Color | What it means | What to do |
|---|---|---|---|---|
| Master Warning (Stop) | RED | Indicates a critical system failure such as engine shutdown or hydraulic pressure loss on this Merlo TF35.7. | Stop the machine immediately, engage parking brake, and consult the manual. | |
| Master Caution | AMBER | Warns of a non-critical fault like a sensor error or minor fluid level issue needing attention. | Check the central display for the specific fault code and address promptly. | |
| Check Engine (MIL) | AMBER | Indicates an engine management issue, often related to emissions or fuel system on the TF35.7. | Have the engine diagnosed by a Merlo technician as soon as possible. | |
| Engine Oil Pressure | RED | Engine oil pressure is critically low, risking immediate engine damage on this telehandler. | Stop the engine immediately and check oil level; if full, do not restart. | |
| Battery / Charging | RED | The alternator is not charging the battery, or voltage is out of range on the TF35.7. | Check battery connections and alternator belt; run engine at low load until serviced. | |
| Coolant Temperature | RED | Engine coolant is overheating, which can cause severe damage if ignored. | Reduce load, idle engine, and check coolant level when safe; allow to cool. | |
| Parking Brake | RED | Indicates the parking brake is engaged or a brake system fault is active on your Merlo. | Release parking brake before driving; if light stays on, service brake system. | |
| Glow Plug / Preheat | AMBER | Glow plugs are active for cold start; wait until this light turns off before cranking. | Turn key to preheat position and wait for light to extinguish, then start engine. | |
| DPF / Regeneration | AMBER | The diesel particulate filter needs regeneration; this light may flash or stay solid on the TF35.7. | Drive at medium load for 20 minutes to initiate passive regen; if solid, see dealer. | |
| DEF / AdBlue | AMBER | AdBlue level is low or quality issue; engine power may be reduced if ignored. | Refill AdBlue tank with approved fluid; if light persists, check system. | |
| Low Fuel | AMBER | Fuel level is low; avoid running dry to prevent air in the system on this model. | Refuel as soon as possible; do not rely on reserve for extended work. | |
| Hydraulic Oil | RED | Low hydraulic oil level or overheating in the TF35.7's system, affecting all functions. | Stop machine, check hydraulic fluid level and hoses; add oil if safe. | |
| Air Filter | AMBER | Engine air filter is restricted, reducing performance and fuel economy on your Merlo. | Clean or replace the air filter element; check pre-cleaner daily. | |
| Fasten Seat Belt | RED | Critical safety warning; operator seat belt is not fastened while machine is moving. | Fasten seat belt immediately before operating the telehandler. | |
| Work Lights | GREEN | Work lights are turned on, illuminating the work area around the TF35.7. | No action needed; switch off when not required to save battery. | |
| Beacon / Rotating Light | GREEN | The rotating beacon is active, indicating the machine is in operation. | Ensure beacon is on when operating in low-light or high-traffic areas. | |
| Differential Lock | AMBER | Differential lock is engaged for increased traction in slippery conditions. | Disengage after overcoming obstacle to avoid transmission wear. | |
| Overload / Capacity | RED | The telehandler's load exceeds safe capacity; risk of tipping or structural damage. | Do not raise load; carefully lower and reduce load to within limits. |
18 symbols shown. Icons follow ISO 2575 dashboard standards; exact graphics vary by model year.
Most Important Warning Lights
Hydraulic System Failure
Common causes
- Low hydraulic fluid
- Leaking hose
- Overheated oil
What to do
Stop operation, check fluid level and for leaks. Use the Merlo TF35.7's secondary lowering function to safely lower any raised load.
Engine Overheat
Common causes
- Low coolant
- Radiator blockage
- Faulty thermostat
What to do
Shut off engine, allow to cool. Check coolant level and clean radiator fins. If persistent, have the cooling system inspected by a Merlo dealer.
Electrical / Charging Failure
Common causes
- Loose battery terminals
- Worn alternator belt
- Failed alternator
What to do
Check battery connections and belt tension. The TF35.7 may run for limited time on battery; seek service immediately.
Transmission Malfunction
Common causes
- Low transmission oil
- Faulty solenoid
- Overheating
What to do
Reduce load and stop. Check transmission fluid level. Do not continue operation; contact Merlo service for diagnostics.
DPF / Exhaust Issues
Common causes
- Frequent short operation
- Failed regeneration
- Contaminated DEF
What to do
Attempt manual regeneration by driving at half throttle for 20 minutes. If the Merlo TF35.7's DPF light remains, dealer intervention is required.
Frequently Asked Questions
Why is my Merlo TF35.7's master warning light on with no other lights?
The master warning can be triggered by non-critical faults like a sensor glitch. Check the display menu for any active codes and clear if minor; if persistent, consult the manual.
How do I interpret the flashing DPF light on the TF35.7?
A flashing DPF light means regeneration is needed. Drive the telehandler at moderate load (around 1500 rpm) for 20-30 minutes to initiate passive regen. A solid light requires dealer service.
What does the amber 'low oil pressure' light mean if it comes on briefly?
If the light flickers at idle, it may be due to low oil or a pressure sensor issue. Check oil level immediately. On the TF35.7, if oil is full, a faulty sensor is possible; monitor closely.
Can I operate the Merlo TF35.7 with the AdBlue light on?
You can operate temporarily, but eventually power will be limited. Refill with DEF fluid meeting ISO 22241. If the light stays on after refill, the system may need resetting.
Why does my glow plug light stay on longer in cold weather?
On the TF35.7, the glow plugs preheat longer in colder temperatures to aid starting. Wait until it turns off completely before cranking; if it stays on over 10 seconds, check the glow plug relay.
What is the 'overload' light and how to reset it?
The overload light warns of exceeding capacity. Reduce load and the light will reset automatically once within limits. If it stays on with no load, a sensor may be faulty.