Cold Weather Engine Starting Procedures; Preparation For Power Delivery (Normal Automatic Voltage Control) - Hobart 6921 Series Operation And Maintenance Manual

OM-2040 / Operation and Maintenance Manual
90D20 / Generator Sets
c. Cold Weather Engine Starting Procedures
WARNING
This kit must not be used in tandem with a glow-plug starting aid. An explosion
and serious injury could result.
A cold weather starting-aid kit (Fig. 2) is an option available for starting the engine at temperatures
o
o
below 50 F (10
(1) Position switches and controls as instructed in steps (1) through (4) , paragraph B, Normal
Engine Starting Procedures, above.
WARNING
Fires, fumes, and flying parts can kill or injure! Starting fluid is extremely
flammable. It is under pressure. Use caution when handling. Avoid contact
with skin and avoid breathing vapor.
(2) Prepare starting aid for use. The starting aid is shipped in a safe condition and is not operable
until assembled. Assemble as follows:
a. Loosen clamp screws (1, Fig. 2) and slide the cylinder (2) upward sufficiently to remove
protective cap (3) and plug (4).
b. Use bottle opener to remove cylinder cap (3). Unscrew and remove plug (4).
c. Slide the cylinder (2) downward and thread into the valve (5). Tighten securely. The starting
aid is now ready to use.
(3) Cold weather starting procedures are the same as for normal starting except:
a. Activate Engine Starter button (27) and engine start switch (26) to crank engine.
b. Follow normal starting procedures and CAUTIONS above steps (1) through (5), para. 2, B).
c. In extremely cold weather it may be necessary to repeat steps (a) and (b) above.
WARNING
Fire or explosion can kill or injure! Do not "flood" the engine with starting fluid.
A serious explosion could result. Use starting aid only for starting. Do not
operate while engine is running.
d. Preparation for Power Delivery (Normal Automatic Voltage Control)
The following power delivery preparation procedures are to be followed after the engine is started.
(1) Check and position switches and controls.
a. Loosen fasteners (4, Fig. 1) and pull generator control tray outward. Place
automatic-manaual switch (31) in AUTOMATIC position. Close tray and secure.
b. Loosen fastener (4) and pull protective relay tray outward. Place test-bank switch (32) in
AIRCRAFT position, if the aircraft being serviced is equipped with a 28.5-VDC interlock relay
system. (If not, place in TEST BANK position.) Slide tray in and secure.
c. Meter switch (6) may be in any position except pointing straight DOWN.
(2) Connect output cable plug connector to aircraft receptacle. Ensure connectors are mated fully
and securely.
Chapter 1-3
Page 4
C) . To start the engine, using the starting aid, proceed as follows:
February 28/94 Revised