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FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06
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SPEED GOVERNOR
The weight-type mechanical governor, is driven directly by the
camshaft and is housed with the cylinder head.
Components:
1 Thrust washer
2 Spool
3 Flyweight assembly
Note: In engines with the minimum/maximum (see fig. 49) the
weights are lightened by 25%.
Governor springs for Gensets
In the section view of the leverages the 4 ball bearings A are
highlighted.
They are mounted on engines for generator sets adjusted at
1,500÷1,800 rpm and on other particular applications on request.
Governor springs
Unscrew the pin that attaches it to the cylinder head.
To remove it as shown in the figure it is necessary to dismount the
camshaft. It could also be removed from the accelerator box side by
unscrewing the torque gearing device.
Before reassembling it, check value A (45 to 46 mm) and the
parallelism of the two levels B that must not exceed 0.05 mm.
Note: There are 5 different types of regulator springs C. These
change according to the engine adjustment: standard spring
for 3,600 rpm, for 3,000 rpm, for 2,400 to 2,600 rpm, for
1,800 rpm and for 1,500 rpm.
Speed governor components
1 Oil seal
2 Screw
3 Support
4 O-Ring
5 Bearing
6 Retainer
7 Screw
8 Flyweight assembly
9 Spool
10 Thrust washer
Disassembly / Reassembly
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