Section 3. Adjustment/Test; General; Generator Set Test; Pre-Operational Test Procedures - Hobart 60PL20 Operation And Maintenance Manual

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. 7, H).
(4) Check tension of engine V-belt.
(5) If governor throttle linkage was disturbed, check all linkage to make certain engine speed may be
controlled when the engine is started. See Figure 3.
(6) Inspect for oil, fuel, and coolant leaks.
(7) If the setting of the voltage regulator rheostat (27, Fig. 1) has been disturbed, set it at CENTER po-
sition (halfway between full clockwise position and full counterclockwise position).
(8) Check engine circuit fuse (21, Fig. 1) by placing panel light switch (13) in ON position. If panel light
(11) operates, the fuse (21) , switch (13) , and lamps are good.
(9) Check fault indicating lights (8) by pressing test switch (7). If lights glow, fuse (21) 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.
CAUTION: Engine must not be running when flashing exciter field if voltage regulator damage
is to be prevented. Do not leave regulated/diagnostic switch in diagnostic position after
flashing field.
(11) At initial start-up after generator overhaul or repair, "flash" the exciter field by momentarily apply-
ing 12-V DC to the field windings. To flash the exciter field, place the Regulated/Diagnostic switch (25,
Fig. 1) in the DIAGNOSTIC position for 3 to 5 seconds. Then return it to the REGULATED position.
(12) Check position of load contactor "on-off" switch (17, Fig. 1) , and engine-generator control switch
(15).
(a) Load contactor switch (17) must be in OFFposition.
(b) Engine-generator control switch (15) must be in IDLE position.
B. Operational Test Procedures
(1) Start the engine in accordance with instructions in 1-3; Para. 2, A thru C.
December 31/91 Revised
OM-2053
2-3
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