Farymann Diesel 15W Repair Manual page 64

12. Speed setting
To increase speed tighten the cross slotted nut
on the governor shaft. ( turn clockwise )..... To
reduce speed loosen the slotted nut ( turn anti-
clockwise ).
Procedure :
For correct speed setting the use of the gover-
nor adjustment tool is recommended ! Don't use
other tools ( screwdriver, i.e. ) not to bend the
governor shaft. In all cases the slottesd nuts on
both sides of the governor weights have to be
resetted.
Remove fuel injection pump and fuel lines if
necessary. Turn flywheel that the slotted nut is
in front of the inj. pump bore.Insert the governor
tool and correct speed as required.
¼ of a turn => speed variation of 20 rpm !
Max possible speed variation approx. 100 rpm.
For larger speed change the governor springs
must be replaced. Replace the cross slotted
nuts whenever a nut has been unscrewed.
Every change in speed setting should be con-
trolled on a test bench or – at least – with a
revolution counter.
TEST RUN, ADJUSTMENTS
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Attention
The cross slotted nut must be at least flat with
the end of the governor shaft. Otherwise the
self securing effect of the nut is not working.
Normally the shaft should protrude ou of the
cross slotted nut.