Section 3. Operation; General; Operating The Generator Set; Pre-Start Inspection - Hobart 60PL20 Operation And Maintenance Manual

SECTION 3. OPERATION

1. General

This section contains information and instructions for the safe and efficient operation of the equipment.
Operating instructions are presented in step-by-step sequence of procedures to be followed in supplying
400-Hz power to an aircraft.
WARNING: Improper operation can kill! Ear protection equipment may be
necessary when working in close proximity to this equipment. Read and follow
all of the operating instructions before attempting to operate the equipment.

2. Operating the Generator Set

A. Pre-start Inspection
(1) Open the fuel shut-off valve.
(2) Provide 12-V DC power to the engine starting system.
(3) Check the engine and generator compartments and remove rags or other foreign materials.
B. Normal Engine Starting Procedures
Engine starting procedures are outlined below. Engine operating controls and monitoring instruments
are illustrated in Fig. 1.
(1) If illumination is required, place light switch (13) in ON position.
NOTE: This switch must be ON to check fuel when engine is stopped.
(2) Hold engine start switch (24, Fig. 1) in START position momentarily. Push engine start pushbutton
(23) to crank engine. When engine starts, release pushbutton. Continue to hold engine start switch
(24) in position until oil pressure gage (20) reads at least 20 PSI pressure. Release switch (24).
(3) Check ammeter (3) for charge reading.
(4) Check fuel gage (12) and oil gage (20) .
(5) Place engine generator control switch (15) in IDLE position.
(6) Activate generator output contactor switch (17) .
December 31/91 Revised
OM-2053
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