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Regulation
The compressor is provided with a continuous
regulating system and a blow-down valve which is
integrated in the unloader assembly. The valve is
closed during operation by outlet pressure of the
compressor element and opens by air receiver
pressure when the compressor is stopped.
When the air consumption increases, the air receiver
pressure will decrease and vice versa.
This receiver pressure variation is sensed by the
regulating valve which, by means of control air to the
unloader and engine speed regulator, matches the air
output to the air consumption. The air receiver
pressure is maintained between the pre-selected
working pressure and the corresponding unloading
pressure.
Cooling system
Engine and compressor are provided with an oil
cooler.
The cooling air is generated by a fan, driven by the
engine.
Safety devices
A thermal shut-down switch protects the compressor
against overheating. The air receiver is provided with
a safety valve.
The engine is equipped with low oil pressure and high
oil temperature shut-down switches.
Frame and axles
The compressor/engine unit is supported by rubber
buffers in the frame. The standard unit has a none
adjustable towbar with support leg and one of the
following towing eyes AC, DIN, ball, ITA, GB or
NATO.
As an option the unit can be equipped with an
adjustable towbar, a jockey wheel and/or overrun
parking brake (for options see chapter
).
The braking system consists of an integrated parking
brake and overrunbrake. When driving backwards the
overrunbrake is not engaged automatically.
Bodywork
The bodywork has openings at the shaped front and
rear end for the intake and outlet of cooling air and a
hood for maintenance and service operations. The
bodywork is internally lined with sound-absorbing
material.
Lifting eye
A lifting eye is accessible when the small door at the
top of the unit is unlocked.
Control panel
The control panel grouping the air pressure gauge,
control switch etc., is placed in the center at the rear
end.
Data plate
The compressor is furnished with a data plate (D)
showing the product code, the unit number and the
working pressure (see chapter
(D)
Summary of Contents for XAS 185 DD7
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