Generator Faults
22.10.19 Kapitel/Chapter 7: Generator Faults - Seite/Page 149
7.8 Engine starting problems
7.8.1 Electric fuel solenoid valve
The fuel solenoid valve is located in front of the injection pump. It opens automatically, if the „START“-button is
pressed on remote control panel. If the generator is switched to „OFF“, the solenoid valve closes. It takes some
seconds, before the generator stops.
If the generator fails to start, runs rough, does not reach the proper RPM, or does not stop properly, the first item to
suspect in most cases it is the fuel solenoid valve and should be inspected first.
A check of the fuel solenoid valve by removing the plug from the fuel solenoid valve for a short period whilst in
operation (first remove the small retention screw) and replace it immediately. The motor should „react immediately“
by revving high. If the motor does not react sharply to the re-connection of the solenoid wire, it is a sign that the
solenoid valve could be faulty.
Fig. 7.8.1-1: Fuel solenoid valve1. Fuel solenoid valve
2. Fuel injector
3. Ventilation screw
Sample Picture
7.8.2 Re-start with failure bypass switch
The start-failure bypass switch enables an immediate restart facility of the generator, should it cut out, even if this
was caused by over-heating. There is normally a requirement to wait until the motor has cooled down to the correct
temperature. This can last for several hours in certain circumstances, since the generator is enclosed in a sound-
insulated casing, which prevents heat loss.
Fig. 7.8.2-1: Failure bypass switchFailure Bypass Switch
Sample Picture
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