the engine’s intake with the means to
separate water and burning embers from
entering the air intake system. There is no
requirement as to where the air intake is to
be located. If there is a possibility of your
apparatus traversing deep water, you need
to specify that the air intake be elevated.
I once had a pumper where the air intake
was located behind the front bumper. Al-
though it didn’t seem like a problem at the
time, the unit was pumping at a fire and
the street became flooded. Several hours
into the fire, the air intake “ingested” a
slug of water and stalled the diesel engine!
Fortunately, there was no permanent
damage, but it stopped the operation and
put the unit out of service! When con-
sidering deep water possibilities, some
departments specify that all vents, such as
the ones on the axle housing, be elevated
to a specified height to prevent water from
entering the gear housing and contami-
nating the axle lubricant.
The standard calls for fuel supply lines
and filters in an accessible location to
meet the manufacturer’s requirements.
Specifying fuel shutoff valves in the lines
will help maintain the fuel system prime
when the mechanic changes the filters.
Depending on where fuel is obtained,
many purchasers specify a fuel/water
separator in place of one of the filters.
These units help prevent moisture that
might be in the fuel from reaching the
engine and doing damage. Some of them
have a remote alarm in the cab that
indicate water in the fuel. Another part of
the fuel system is the requirement for the
fuel tank to be of a capacity to allow the
engine to drive the pump for 2½ hours at
rated capacity or to operate at 60 percent
of gross engine horsepower for 2½ hours,
whichever is greater. With larger horse-
power engines being specified, larger
fuel tanks might be required to be speci-
fied. I would suggest asking the man-
ufacturer what the minimum capacity
tank would be to meet the standard, and
then consider a larger tank depending on
anticipated operating conditions.
To comply with Environmental Protection Agency regulations on diesel
exhaust emissions, extensive systems
including diesel particulate filters are
( 15) Lights to illuminate the ground under cab
and crew cab doors must be provided. Also,
notice the covered jumper studs to be used in
the event of a battery failure with the cab down.
( 16) LED scene lights provided outstanding
illumination at a minimum of amp draw. (Photo
by Ron Jeffers.)