Preparation For Power Delivery (Normal Automatic Voltage Control); Power Delivery; No. 1 Output Circuit - Hobart 140GT17P Operation And Maintenance Manual With Illustrated Parts List

(3) Cold weather starting procedures are exactly the same as for normal starting except:
(a) Before cranking the engine, pull the starting aid control OUT to the full extent of its travel. Hold
for 2 to 3 seconds. (This allows the starting aid valve chamber to fill with pressurized ethyl ether.)
(b) Push the control IN. (This step sprays starting fluid into the engine intake manifold.)
(c) Push starter switch (24) to crank engine.
(d) Follow normal starting procedures and CAUTIONS above [steps (5) through (7), para. 2, B].
(e) In extremely cold weather it may be necessary to repeat steps (a) and (b) above.
CAUTION: USE STARTING AID ONLY FOR STARTING. DO NOT OPERATE WHILE ENGINE IS
RUNNING.
WARNING: DO NOT "FLOOD" THE ENGINE WITH STARTING FLUID. A SERI-
OUS EXPLOSION COULD RESULT.
D. Preparation for Power Delivery (Normal Automatic Voltage Control)
The following are power delivery preparation procedures to be followed after the engine is started.
(1) Check and position switches and controls.
(a) Open front door of the generator control box and check the position of the REGULATED/DI-
AGNOSTIC switch (38). Make certain that this switch is in the REGULATED position.
(b) Place test bank switch (36) in AIRCRAFT position if the aircraft being serviced is equipped
with 28.5VDC interlock relay system. (If not, place in TEST BANK position). Close and fasten
front door of generator control box.
(c) Meter selector switch (5) may be in any position except pointing straight DOWN.
(2) Connect output cable plug connector to aircraft receptacle. Be sure connectors are mated fully
and securely.
E. Power Delivery

No. 1 Output Circuit

(1) Place engine-generator control switch (23, Fig. 1) in BUILD-UP-VOLTAGE position momentarily,
then allow it to position itself in GEN position. The electric governor will immediately increase engine
speed to 1714 RPM and maintain it.
(2) Observe generator instruments. Frequency meter (9, Fig. 1) should indicate exactly 400 Hz. Volt-
meter (8) should indicate 115 V AC when line switch (6) is in LINE-TO-NEUTRAL position.
(3) The final step in delivering power is closing the load contactor. When satisfactory frequency and
voltage values are indicated by the instruments, close No. 1 load contactor by momentarily placing
the load contactor control switch (18) in the top (spring loaded), CLOSE position. The green indicating
light (17) should glow at once to indicate that the load contactor is closed and power is available at
the aircraft. As soon as the light glows, release the switch. It will automatically return to the center ON
position.
July 27/90 Revised
OM-2029
1-3
Page 5