switch to the 60 Hz position.
Loosen locknut and adjust R103 (54, figure
4-1) for 60 Hz operation. Monitor the
FREQUENCY meter on the Control Cubicle.
Tighten locknut (55).
Proceed to normal operation of the set and
toggle the FREQUENCY SELECTOR switch
to the 50 or 60 Hz position depending on the
temperature has stabilized and is normal.
Turn the GAIN potentiometer clockwise until
the generator set becomes unstable. Then
back off this adjustment until generator set
just becomes stable.
Rotate the STABILITY potentiometer 1/4
The governor controller in the master
unit may have to be readjusted to
obtain a balanced load condition
between the master set and other units
in parallel operation. KW meters must
(proper load sharing).
4-14. REMOVAL AND REPLACEMENT. To gain
access to the governor controller, access panel must be
removed first, see paragraph 4-2.
MAINTENANCE LOCKOUT SWITCH TO
LOCKOUT. DISCONNECT NEGATIVE
CABLE FROM BATTERIES. REMOVE
POWER CABLE FROM RECEPTACLE
J101 (120V RECEPTACLE).
connected to the two terminal boards.
Remove warning plate to gain access
to terminals 1, 2 and 3 connections.
Referring to figure 4-1, remove the six
screws (52) and nuts (53) attaching
mounting bracket (62).
Remove potentiometer R103 (54)
removing shaftlock (55). Mounting
bracket (62) may be removed by
removing six screws (61).
mounting bracket (62) with shaftlock
Replace mounting bracket (62) with
six screws (61).
Attach governor controller (56) to
mounting bracket (62) with six screws
(52) and nuts (53).
Connect wires to terminal boards. Be
sure to connect potentiometer (54)
Remove tags from wires. Replace
Perform adjustment procedures in
accordance with paragraph 4-13.
4-15. TESTING. Bench testing is accomplished by
simulating various parameters connected to the unit.
The following items are required for the test setup: 20 to
40V DC source; 2 SPST switches; 35-ohm 10-watt
resistor; AC signal generator, capable of producing 60
Hz with 10 rms volts output; and a DC voltmeter to 25
Before performing test, visually check
for damage to the chassis, terminal
block, or printed circuit board.
Make the following connections to the
governor A106 terminal boards (see figure
Connect 20 to 40V DC source to 12(+)