Tad1630G/Ge Y Tad1631G/Ge - Volvo Penta TAD1630G Workshop Manual

Fuel system
TAD1630G/GE, TAD1631G/GE
The injection pump on TAD1630G/GE, TAD1631G/ GE is
fitted with an electronic speed governor. The electronic gov-
ernor system is a control unit which controls the engine
speed. Its task is to:
– maintain the idling speed at the set value.
– maintain the engine's operating speed at the preset val-
ue despite varying loads.
Unlike the mechanical governor, the electronic governor
does not have governor weights. The speed is instead con-
trolled by the control unit, "sensing" the difference between
the set speed and the actual speed. The difference value is
converted into a signal to an electromagnet (actuator) which
adjusts the injection pump's control rod to increase or de-
crease the injection quantity.
An overspeed protection must always be fitted beside the
electronic governor to prevent bodily injury or material dam-
age if the engine should go out of control.
Seal screw, removal
A
When removing seal screw (A) for the injection pump, use
tool 885346 as shown below:
92
1
Tighten the tool's socket head cap screw with a hex sock-
et key.
2
Place the tool on top of the seal screw's conical thread
and turn the top of the tool counter-clockwise by hand.
Use a 17 mm key to loosen the seal screw.
3
When the seal screw is loose, loosen the socket head cap
screw.
Group 22