Vetus DIESEL GHS4 Manuel D'utilisation page 50

Maintenance
Consult a VETUS
5
FARYMANN Specialist!
Adjusting the GHS4 Fuel Pump
This can only be adjusted inside the fuel pump itself.
When adjustment is required, it is recommended that you let it be
done by a Vetus farymann Service Specialist.
48
Check engine Speed/Adjust Fuel Pump
Seal
Increasing the
speed
Adjusting the GHS6.5, GHS8, GHS14 and GLS6.5 Fuel
Pump
Unscrew both lock nuts and adjust the set screws until the cor-
rect speed has been reached. Then tighten up the lock nuts
again. Turn set screw A when the speed has to be increased; turn
set screw B when the speed has to be reduced.
Every 400 operating hours.
A
B
Reducing the
speed