Generator Frequency Adjustment; Fuel Run Solenoid - Westerbeke 8.0KW-60Hz Service Manual

ENGINE ADJUSTMENTS
GENERATOR FREQUENCY ADJUSTMENT (HERTZ)
Once the diesel generator set has been placed in operation,
there may be adjustments required for engine speed (Hertz)
during the engine's break-in period (first 50 hours) or after
this period. A no-load voltage adjustment may also be
required in conjunction with the engine's speed adjustment.
These are not warrantable adjustments as they relate to
nonnal break-in and maintenance.
Frequency is a direct result of engine/generator speed, as
indicated by the following:
When the generator is run at 1800 rpm, the AC voltage
output frequency is 60 Hertz.
When the generator is run at 1500 rpm, the AC voltage
output frequency is 50 Hertz.
Therefore to change the generator's frequency, the engine
speed
must
be changed. To accomplish the frequency change,
perform the following:
1. With the engine stopped, connect the AC output leads to
the AC terminal block in accordance with the AC voltage
connections diagram specified for your generator set, and
change the Hertz circuit connection to the capacitor.
These connections are shown in the GENERATOR
section of this manual
A
WARNING:
Before starting the engine make
certain that everyone is clear of moving parts! Keep
away from pulJeys and belts during test procedures.
2. Start the engine and adjust the engine's speed to obtain
the frequency corresponding to the voltage selected by
adjusting the stop bolts and positioning the throttle arm
against these stop bolts to either increase or decrease
engine no-load speed to adjust the Hertz produced.
3. To arrive at the appropriate frequency, either monitor
the speed of the engine/generator with a tachometer, or
monitor the frequency with a frequency meter, the latter
method being the more precise of the two.
FUEL RUN SOLENOID
The fuel run solenoid is mounted in a threaded hole on the
engine's block just aft of and below the engine's fuel injec-
tion pump. Proceed as follows when installing a replacement
or new fuel run solenoid.
1. Visual access to the fuel injection pump's fuel rack is
needed. To obtain this, remove the small square side
cover and gasket just below the fuel injection pump.
2. Thread the locknut onto the solenoid and then apply a
small amount of Teflon sealant to the threads on the
solenoid.
3. Thread the solenoid into the hole on the engine and
observe the solenoid plunger through the cover opening.
Allow the plunger to contact the fuel rack and move fully
into the injection pump. Do not thread further so as to
push the plunger into the solenoid.
4. Back the solenoid out 1/4 - 112 of a tum and secure it in
position with the locknut.
LOCKNUT TORQUE VALUE 28.9 - 36.2 H-Ib (4.0 • 5.0 m-kg)
5. Properly connect the three electrical leads from the sole-
noid. Two of the connections plug into the engine harness
and the third grounds to the engine block at an adjacent
inboard threaded hole with an 8mm bolt.
6. Reassemble the cover and gasket and test run the unit. Make
certain that the unit stops when the solenoid is de-energized.
/
FUEL RUN SOLENOID
"'=--:/~SPEED
ADJUSTMENT
[FACTORY SETI
Engines
&
Generators
49