Hobart Brothers 6910, Operation And Maintenance Manual With Illustrated Parts List

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C. Cold Weather Engine Starting Procedures
Two optional starting aids are available for installation on generator sets covered by this manual to as-
sist in starting the engine at low temperatures.
The starting aid identified by Hobart Part Number 488913 and illustrated as Figure 2 must be pre-
pared for operation as explained in sub-paragraph (1) following. Once prepared for operation, a
starting aid control
(24, Fig. 1)
located on the engine control panel enables the operator to manu-
ally spray a controlled amount of starting fluid into the engine’s air intake system during and imme-
diately after cranking. This starting aid is used at temperatures below 50
o
F.
The starting aid identified by Hobart Part Number 282320, when installed, operates automatically
during cranking to spray a controlled amount of starting fluid into the engine’s air intake system.
This is accomplished by use of a relay wired to the starter solenoid, which controls starting fluid
flow from the starting aid cylinder. This starting aid is thermostatically controlled, and only oper-
ates at temperatures below 40
o
F. In general appearance, the automatically controlled starting
aid looks similar to the manually controlled starting aid shown in Figure 2, and is installed in the
same location on the generator set..
(1) Assembly of Manually Controlled Starting Aid
(a) Position switches and controls as instructed in steps (1) through (4), paragraph B, Normal En-
gine Starting Procedures, preceding.
(b) Prepare starting aid for use. The starting aid is shipped in a safe condition and is not operable
until assembled. Assemble as follows:
WARNING: FIRES, FUMES, AND FLYING PARTS CAN KILL OR INJURE! START-
ING FLUID IS EXTREMELY FLAMMABLE. IT IS UNDER PRESSURE. USE CAU-
TION WHEN HANDLING. AVOID CONTACT WITH SKIN AND AVOID BREATHING
VAPOR.
(aa) Loosen clamp screws (1, Fig. 2) and slide the cylinder (2) upward sufficiently to remove
protective cap (3) and plug (4).
(bb) Use bottle opener to remove cylinder cap (3). Unscrew and remove plug (4).
(cc) Slide the cylinder (2) downward and thread into the valve (5). Tighten securely. The
starting aid is now ready to use.
(2) Starting Procedures with Manually Controlled Starting Aid
Cold weather starting procedures are exactly the same as for normal starting except:
(a) Before cranking the engine, pull the starting aid control (24, Fig. 1) OUT to the full extent of
its travel. Hold for 2 to 3 seconds. (This allows the starting aid valve chamber to fill with pressur-
ized ethyl ether.)
(b) Push the control IN. (This step sprays starting fluid into the engine intake manifold.)
(c) Push starter switch (28) to crank engine.
(d) Follow normal starting procedures as given in Paragraph 2, B preceding.
OM-2028
1-3 August 31/90 Revised
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