KKK-A-1822 E
on and off road vehicle use. Verification test: the cooling system shall be capable of maintaining
a safe stabilized engine operating temperature for a minimum of one hour, at a minimum ambient
temperature of 38° C (100° F), at all altitudes up to 3048 m (10,000 ft). For gasoline engines,
the cooling system shall be capable of maintaining a safe operating temperature for not less than
40 minutes, at sea level, in a minimum ambient temperature of 35° C (95° F). Testing shall be at
the engine speed required to maintain the generating systems as specified in 3.7.6 and shall be
tested in accordance with AMD Standard 014.
3.6.4.5.1 ANTIFREEZE.
The cooling system shall be protected with the chassis manufacturer's recommended type
and concentration of permanent type antifreeze.
3.6.4.6 EXHAUST SYSTEM.
Vehicle shall be equipped with an exhaust system in accordance with Federal Motor Carrier
Safety Regulations, Part 393.83. The exhaust system shall be suspended using not less
than three hangers, excluding the manifold attachment. The exhaust shall discharge at the
vertical side(s) of the ambulance at a maximum distance of 25 mm (1 in.) beyond the side
of the module and be angled /positioned to project the exhaust away from the door(s) to
minimize fumes and contaminants entering the interior. On modular vehicles, the tailpipe
outlet shall not terminate within 15 cm (6 in.) of the vertical axis of the fuel tank filler
opening(s). Modifications or extensions made to the OEM exhaust system shall meet or
exceed chassis manufacturer's requirements in terms of backpressure, components, design,
and workmanship.
3.6.5
DRIVE TRAIN.
3.6.5.1 DRIVE TRAIN COMPONENTS.
The drive train and component's torque capacity shall meet or exceed the maximum torque
developed in the lowest gear ratio by the engine. Transmission and controls shall comply
with FMVSS 101 and 102.
3.6.5.2 AUTOMATIC TRANSMISSION.
Unless otherwise specified (see 6.2-l), the chassis manufacturer's automatic transmission
shall be provided. The transmission shall provide not less than four speeds forward and
one reverse and shall be equipped with the chassis manufacturer's heaviest duty oil cooler.
3.6.5.2.1 AUTOMATIC TRANSMISSION AUXILIARY HEAVY-DUTY OIL COOLER.
When specified (see 3.15.3-20), a heavy-duty, fin type auxiliary transmission oil cooler in
addition to the OEM basic cooler (3.6.5.2) shall be provided and installed, in series, in a
suitable location except behind the radiator.
3.6.5.3 TRANSFER CASE FOR CLASS 2 AMBULANCE.
Unless otherwise specified (see 6.2 l), a part-time four wheel drive system shall be provided
for Class 2 vehicles. These vehicles shall be furnished with 2 speed transfer case that is
integral with the main transmission. A shift pattern located on the shift knob or decal,
within the cab, shall be provided. Front-wheel drive hubs (see 3.6.5.9) and special traction
rear-end differential (see 3.6.5.8), shall also be furnished on 4x4 vehicles. When furnished as
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