Section 3. Adjustment/Test; General; Generator Set Test; Pre-Operational Test Procedures - Hobart 140GT17P Operation And Maintenance Manual With Illustrated Parts List

SECTION 3. ADJUSTMENT/TEST

1. General

Adjustment and test procedures are most applicable to testing and adjusting the generator set after a ma-
jor repair, replacement of parts, or overhaul.

2. Generator Set Test

A. Pre-operational Test Procedures
(1) Connect cables from the generator output terminals to a load bank. Use cables of the same size
and length as those to be used in service. Be sure the generator output "N" cable is grounded.
(2) Check engine oil level. Oil should be at FULL mark on gage rod.
(3) Check radiator coolant level (Ref. Section 2-1, Para. 6, H).
(4) Check tension of fan and generator V-belts.
(5) If governor throttle linkage was disturbed, check all linkage to make certain engine speed may be
controlled when the engine is started.
(6) Inspect for oil, fuel, and coolant leaks.
(7) If the setting of the voltage regulator rheostat (See TM-759 or OM-2020 for your particular regula-
tor) has been disturbed, set it at CENTER position (halfway between full clockwise position and full
counterclockwise position).
(8) Check engine circuit breaker (16, Fig. 1) by placing panel light switch (25) in ON position. If panel
lights (1) operate, the circuit breaker (16), switch (25), and lamps are good.
(9) Check fault indicating lights (10, 11, 12, 13, and 14) by pressing test switch (3). If lights glow, cir-
cuit breaker (4) and indicating lamps are good.
(10) Make a general inspection of all wiring and terminals. Inspect the equipment to be certain no
damage will result from starting the engine.
(11) At initial start-up after generator overhaul or repair, "flash" the exciter field by momentarily apply-
ing 12VDC to the field. To flash the field, simply place the regulated/diagnostic switch (38 in the DIAG-
NOSTIC position, and WITHOUT STARTING THE ENGINE, momentarily hold the engine
START/RUN/STOP switch (22) in the START position. Return the regulated/diagnostic switch to the
REGULATED position after flashing field.
CAUTION: ENGINE MUST NOT BE RUNNING WHEN FLASHING FIELD IF VOLTAGE REGULATOR
DAMAGE IS TO BE PREVENTED.
B. Operational Test Procedures
(1) Start the engine in accordance with instructions in 1-3; Para. 2, A and B.
(2) Check operation of engine instruments: DC ammeter (15, Fig. 1), coolant temperature indicator
(28), oil pressure gage (27), and hourmeter (29).
(3) Check engine idle speed. Should be 825 to 875 RPM. Adjust, if necessary, in accordance with in-
structions in Engine Operator's Manual.
NOTE: A stroboscope is required for this check.
July 27/90 Revised
OM-2029
2-3
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