MIL-W-80037C
3.5.1.10 Coolinq system. Liquid cooled engines shall be provided with
thermostat controlled liquid cooling system of0 adequate 0 size and design to
operate at an ambient temperature between -25 F and 110 F. Unless otherwise
specified (see 6.2.1) liquid cooled engines shall have a high temperature
shutduwn device to stop the engine in the event of excessive temperature.
3.5.1.11 Automatic idling device. Each machine shall have an automatic
idling device to reduce speed of the engine to an idle when not weldlng.
Upon striking an arc, the idling device-shall immediately allw the engine
to speed up to its previous setting. The idling device shall have the means
to keep the engine at a constant speed if so desired. The idling device shall
have a time delay to allow the operator when welding, to change electrode
before the engine comes to idling speed.
3.5.1.12 Muffler. The machine shall have a muffler on the engine exhaust
system. If the system is the vertical or upright type, it shall have
a suitable rain cap on the end of the exhaust pipe to prevent water from
entering.
3.5.1.13 Controls and instruments. The engine controls and instruments
shall be grouped together in a separate panel, or be integral with the welding
generator control panel. The controls for the cold weather starting aid may
be located on the engine. Liquid cooled engines shall have a temperature gage
or warning light, each engine shall have an oil pressure gage or warning light
and engines with an electrical charging system shall have an ameter or warning
light, All instruments shall be flush mounted, When specified (see 6.2.1) the
engine shall have an hour meter of the sealed repeating type to register up
to 9999.9 hour.
3.5.2 Fuel system,
3.5.2.1 Fuel tank. When operated at maximum load and rated duty cycle,
the Type I machine shall have a fuel capacity to operate not less than 3 hours,
the Type II machine not less than 6 hours and the Type III and IV machines not
less than 8 hours. Each tank shall have a drain plug.
3.5.2.2 Fuel gage. The Type II, III and IV machines shall have a gage to register
the quantity of fuel in the tank.
3.5.2.3 Fuel lines. Fuel lines shall be installed free of sharp bends and
loops that might cause failure from fatigue, strain, or vapor lock. The fuel
lines shall be bracketed and fastened when necessary to prevent vibration. A
shut-off cock shall be installed in the outlet of the tank when the tank is
located to provide gravity feed.
3.5.2.4 Fuel strainer and filter. The Type I and II machines shall have a
strainer in fuel system. The strainer shall have a removable cover or
bowl for cleaning and servicing. The Type III and IV machine shall have means
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