Starting The Engine; Generator Operation; Deliver Power; Stop Operation (Shutdown) - Hobart Jet-Ex 5D Operation And Maintenance Manual

OM-2094 / Operation and Maintenance Manual
Jet-Ex 5D / Series 500285 / Generator Set
c. Starting The Engine (Figure 1)
Make sure that all Prestarting Instructions have been carried out, and reference to Initial Preparation
for Use has been checked for operating details.
(1) Check engine oil, fuel and coolant levels.
(2) Check AIR CLEANER SERVICE INDICATOR lamp (16, Figure 1). If lamp is glowing, replace air
filter element and/or remove other objects that obstruct air flow.
(3) Place SPEED CONTROL toggle switch (10) in the IDLE (down) position.
CAUTION
(4) Hold engine ENGINE CIRCUIT toggle switch (13) in START position.
(5) Press and hold ENGINE START push-button switch (12). Release as soon as engine starts.
(6) Release engine ENGINE CIRCUIT toggle switch (13) to RUN position when oil pressure builds
up.
(7) Observe engine RPM on the TACHOMETER (1), idle speed should be 1000 RPM +/- 50 RPM.
(8) Allow engine to warm up before applying a load.
WARNING
d. Generator Operation (Figure 1)
(1) Place speed control switch (10) in RATED RPM (up) position. Engine speed will be 2500 RPM,
and the generator will automatically build up to produce rated voltage.
(2) Adjust CURRENT LIMITING CONTROL potentiometer (9) if necessary. Refer to Proper Aircraft
documentation for proper setting.
e. Deliver Power
(1) Connect output cable to AIRCRAFT.
(2) Hold CONTACTOR CONTROL toggle switch (7) in CLOSE position. Release to ON position as
soon as green CONTACTOR CLOSED lamp (8) comes on.
f. Stop Operation (Shutdown)
(1) Normal Conditions
a. When power delivery is completed (aircraft discontinues drawing current), place
CONTACTOR CONTROL toggle switch (7) in OFF position. The CONTACTOR CLOSED
lamp (8) should go off to indicate load contactor has opened and power is no longer available
at the aircraft.
b. Place SPEED CONTROL toggle switch (10) in IDLE (down) position. Allow engine to run for
2 to 3 minutes.
c. Disconnect output cable from aircraft receptacle and store cable in cable trays or on cable
hangers as the case may be.
d. Place ENGINE CIRCUIT toggle switch (13) in STOP position.
November 1, 2000
If the engine stalls or falters in starting, wait three or four seconds before
re-engaging starter. This will prevent possible damage to starter or the engine.
DO NOT Operate the starter for periods longer than 15 seconds at a time. An
interval of at least two minutes should be allowed between cranking periods to
protect the starter from overheating.
The engine's entire exhaust system will get very hot and cause severe burns if
touched.
Chapter 1-3
Page 3