REMOTE VOLTAGE CONTROL TESTING AND ADJUSTING SUBJECT: Remote Voltage Level Control For Caterpillar Generators BUSINESS: Building Services, Material Handling, Marine, Petroleum, Agriculture PRODUCT/APPLICATION: Generator Sets, SRCR and SR 4 It is sometimes desirable to control the voltage level of a generator at a remote-mounted control panel rather than at  the  generator.   These  instructions  cover  the  selection and installation of a remote potentiometer to provide the same  full  range  of  voltage  level  control  as  the  original generator mounted control.  These instructions move the point    of    control    from    the    generator    to    the    remote location. Selection of Potentiometer Control If  screw   driver   slot   adjustment   with   locking   feature   is acceptable,  the  original  generator  mounted  control  can be moved to the remote location.  A parts service control (duplicate   of   original)   could   also   be   used.      If   a   knob adjustment and indicator dial is desired, select a  25 watt wire   wound   potentiometer   of   suitable   shaft   length   to accommodate   the   knob   and   dial.      SRCR   Generators require    a     25    ohm,    25    watt    potentiometer.        SR4 generators require a 500 ohm, 25 watt potentiometer. Wiring the Remote Voltage Level Control: 1. Prepare   three   lengths   of   No.      14   600   volt insulated  wire.    Use  one  yellow  wire,  one  red wire,  and  one  white  wire.    Cable  these  wires  to avoid   damage.      Connect   the   potentiometer   to the three wires as follows: Yellow Wire - Solder to the clockwise end of the potentiometer. Red  Wire  -  Solder  to  the  counter-clockwise  end of the potentiometer. White Wire - Solder to the sliding arm contact of the potentiometer   and   to   the   counterclockwise end of the potentiometer along with the red wire. 2. Disconnect    the    existing    generator    mounted voltage    level    control    at    the    terminals    noted below.    Insulate  each  of  the  removed  wires  and secure   these   to   avoid   any   vibration   damage. Connect the wires to the terminals designated: A. SRCR   Generators   With   Panel   Mounted Two    Phase    Half    Wave    Exciter    (Serial Numbers below 1500) 1. Remove existing white wire at terminal  17,  red  wire  at  terminal  20, and yellow wire at terminal 16. 2. Connect  new  white  wire  to  terminal 17,   red   wire   to   terminal   20,   and yellow wire to terminal 16. B. SRCR    Generators    With    Tray    Mounted Two-Phase    Half    Wave    Exciter    (Serial Numbers 1500-2000) 1. Remove    existing    white    wire    from terminal TB1-3, red wire from terminal    TB1-5,    and    yellow    wire from terminal TB1-4. 2. Connect  new  white  wire  to  terminal TB1-3,  red  wire  to  terminal  TB1-5, and yellow wire to terminal TB1-4. C. SRCR    Generators    With    Tray    Mounted Two-Phase    Half    Wave    Exciter    (Serial Numbers above 2000) 100