BOLT 8T0375 - Caterpillar

Pre-Operation Check
After the generator is installed and before operating the first time, perform a check of the equipment as follows: 1. If the generator has been exposed to excessive dampness it may be necessary to dry out the windings before operating. If the generator has been exposed to extremely low temperatures it should be slowly warmed up to prevent condensation.2. Check all interconnecting wiring against the wiring diagrams.3. Make certain no foreign objects are lodged in the generator. Remove all tools and shop cloths from the vicinity of the equipment.4. Ensure that all covers and guards are installed correctly.Initial Start Procedures
After installation and the above checks have been completed, make an initial start and checkout of the equipment as follows: 1. Open the main circuit breaker to the load.2. Turn the AUTO VOLTAGE ADJUST rheostat to the minimum (full clockwise). Turn the RANGE ADJUST rheostat slowly clockwise to obtain maximum voltage setting. Never set voltage more than 10% higher than that desired. Turn the VOLTAGE ADJUST rheostat to the desired voltage.Indicator Lights
CONTROL PANEL
1-Amber lamps. 2-Red lamp. 3-Voltage adjust rheostat (R18). 4-Indicator lamp legend.The generator mounted control panel contains two amber (1) and one red (2) indicator lamps. The two amber lamps are labelled "Overspeed" and "Underspeed", and the red lamp is marked "Overvoltage". A decal, with the indicator legend is mounted on the control panel.
FREQUENCY/VOLTAGE SENSING ASSEMBLY 5 R66 SW17 R28 R49 R110 C111 Overspeed tap12 139 volt tap13 Common tap14 Underspeed tap15 120 volt tap16 Overvoltage tap17 100 volt tap18 Common tap19 R320 R521 T1Assume the generator is connected for 3 phase 120/208 volts operation. At 120 VAC and 60 hertz, both speed indicating lamps will be moderately and evenly lit. The brilliance of the lamps are an indication of voltage. The lamps will go out at 115 VAC. At 130 VAC, either or both lights will glow at maximum brilliance, depending on the frequency, and the over-voltage lamp will light. The speed lights also indicate frequency. At exactly 60 hertz, both will be equally lit. As the frequency increases, the overspeed light becomes brighter while the underspeed lamp will go out. Decreasing frequency will have the opposite effect.The recommended procedure for setting voltage and frequency is to accelerate engine to an estimated 1800 RPM. This is a generator frequency of 60 hertz. At least one of the speed lights should be lit. If not, increase the VOLTAGE ADJUST rheostat until at least one of the lamps comes on. Adjust the engine speed until both lights are evenly lit, then fine adjust the VOLTAGE ADJUST rheostat until both lamps glow dimly. The voltage at which the lamps begin to glow is 115 volts, so adjust for a moderately low brilliance.
INDICATOR LAMP SYSTEM SCHEMATICCalibration Procedure
A voltmeter and a frequency meter, accurate within 2%, are required to calibrate the indicator lamps.1. Make sure that switch (6) is in the correct position (50 or 60 cycle), and that the voltage is on the correct voltage tap (100, 120, 139 volts).2.