Specifications

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ENGINE HEATER Bidder Complies: Yes ( ) No ( )
A 1,000 watt, 120 volt, immersion type engine heater shall be installed with the AC power inlet located
to the rear of the driver's door.
ENGINE AIR INTAKE Bidder Complies: Yes ( ) No ( )
An air intake with an ember separator (to prevent road dirt, burning embers, and recirculating hot air
from entering the engine) shall be mounted at the front of the apparatus, on the passenger side of the
engine.
The ember separator shall be mounted in the air intake with flame retardant, roto-molded polyethylene
housing. It shall be easily accessible by the hinged access panel at the front of the vehicle.
EXHAUST SYSTEM Bidder Complies: Yes ( ) No ( )
The exhaust system shall be stainless steel from the turbo to the inlet of the selective catalytic
reduction (SCR) device, and shall be 4.00" in diameter. The exhaust system shall include a diesel
particulate filter (DPF) and an SCR device to meet current EPA standards. An insulation wrap shall be
provided on all exhaust pipe between the turbo and SCR to minimize the transfer of heat to the
cab. The exhaust shall terminate vertically ahead of the water tank to a point above the body. A
tailpipe diffuser shall be provided to reduce the temperature of the exhaust as it exits. Heat deflector
shields shall be provided to isolate chassis and body components from the heat of the tailpipe diffuser
RADIATOR Bidder Complies: Yes ( ) No ( )
The radiator and the complete cooling system shall meet or exceed NFPA and engine manufacturer
cooling system standards.
For maximum corrosion resistance and cooling performance, the entire radiator core shall be
constructed using long life aluminum alloy. The core shall be made of aluminum fins, having a
serpentine design, brazed to aluminum tubes. The tubes shall be brazed to aluminum headers. No
solder joints or leaded material of any kind shall be acceptable in the core assembly. The radiator core
shall have a minimum frontal area of 1434 square inches. Supply and return tanks made of glass-
reinforced nylon shall be crimped on to the core assembly using header tabs and a compression gasket
to complete the radiator core assembly. The radiator shall be compatible with commercial antifreeze
solutions.
There shall be a full steel frame around the entire radiator core assembly. The radiator core assembly
shall be isolated within the steel frame by rubber inserts to enhance cooling system durability and
reliability. The radiator shall be mounted in such a manner as to prevent the development of leaks
caused by twisting or straining when the apparatus operates over uneven ground. The radiator
assembly shall be isolated from the chassis frame rails with rubber isolators.
The radiator assembly shall include an integral deaeration tank permanently mounted to the top of the
radiator framework, with a readily accessible remote-mounted overflow tank. For visual coolant level
inspection, the radiator shall have a built-in sight glass. The radiator shall be equipped with a 15 psi
pressure relief cap.
A drain port shall be located at the lowest point of the cooling system and/or the bottom of the radiator
to permit complete flushing of the coolant from the system.
A heavy-duty fan shall draw in fresh, cool air through the radiator. Shields or baffles shall be provided
to prevent recirculation of hot air to the inlet side of the radiator.
COOLANT LINES Bidder Complies: Yes ( ) No ( )
Silicone hoses shall be used for all engine/heater coolant lines installed by the chassis manufacturer.
Hose clamps shall be stainless steel "constant torque type" to prevent coolant leakage. They shall
react to temperature changes in the cooling system and expand or contract accordingly while
maintaining a constant clamping pressure on the hose.