Magni RTH 4.18, Use And Maintenance Manual

Page: 117 / 127

MAINTENANCE 117
Engine - white fumes at the exhaust
Cause Solution
Fuel dirty or non conforming
SWITCH THE ENGINE OFF.
Replace the fuel filters.
Run the engine with correct fuel.
Oil level not correct Check the level
Diesel and hydraulic oil in engine casing
If the oil is contaminated, check the gaskets at the power
take-offs.
Drain oil, clean and refill with fresh oil
Leaks from seals in the valve seats – evident after
long periods at minimum speed followed by
sudden acceleration Contact your dealer
Fault in one or more injectors Check the electrical connections
Piston belts not sealed –
blue fumes at all speeds
Contact your dealer
Restrictions to the working due to malfunctioning of the UREA/AdBlue system
The drive units satisfying the stage IV and stage V regulatory standards are provided with special control software
for limiting their working until they are switched off for precautionary purposes if there are problems in the
UREA/AdBlue purification systems. Specifically, the problems can be summarised as follows:
- low level of urea in tank,
- poor quality of urea liquid,
- tampering with the urea system,
- system errors
Depending on the extent of the anomaly, in order to protect the thermal unit, the software controls a power
reduction at two levels:
- level 1: torque reduction,
- level 2: torque and engine rpm reduction.
A separate safety button is provided for temporary deactivation of the power reduction caused by the system.
This function can only be activated for a limited period to allow the operator to park the vehicle in a safe place.
In compliance with EU legislation, the function is available for engines with level 1 and 2 power reduction, while in
compliance with EPA legislation, it is only available for level 1 power reduction.