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Volvo Engine Repair Instructions

Volvo Engine   Repair Instructions Magnetically controlled proportional valve (MPROP) A magnetically controlled proportional valve (MPROP) controls the high pressure pump to ensure that the correct fuel pressure (rail pressure) is retained despite varying engine speed and loading. The input signal to the valve is a PWM signal whose pulse width is controlled by the engine control module. When the current through the valve is changed, this affects the fuel flow, which results in changed rail pressure. Water in fuel switch, secondary fuel filter A switch is located in the water trap under the fuel filter. Its task is to detect whether there is water in the fuel. The switch senses the resistance between two pins, wich are in contact with the fuel. When there is no water in the fuel, the resistance is very high. If there is any water in the fuel, the resistance falls. Switch, coolant level The task of the switch is to discover whether the coolant level in...

Diesel Engine Maintenance for Volvo Penta

Diesel Engine Maintenance  for Volvo Penta If you are a newcomer to diesel trucks, then you are likely also a newcomer to diesel engines. You may think that all DIY repairs on engines and engine maintenance is the same. The truth is that there are some changes between the diesel and gas engines. If you are considering taking on any of your diesel engine repair or maintenance yourself, then there are some tips that you should consider. Catalytic Converter Tips The catalytic converter helps to control emissions from the diesel engine into the air. It helps to control pollutants as well as toxic fumes and exhaust. If you think that you are having issues with your converter, you can check by using a vacuum gauge. This will let you know if it is working to proper standards. In addition to this check, you will also want to make sure that you do not have the heat shields in place during any maintenance or repair. It could cause a major meltdown of the system and further ...