Specifications

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hydraulic drive design shall be certified by manufacturer of the primary components as suitable for the
intended use and duty cycle.
All components of the air compressor and drive system shall be readily available on the domestic air
compressor / hydraulic market (USA). The compressor shall be designed and assembled by the
apparatus manufacturer, using standard components available to air compressor OEM's. The hydraulic
drive system shall be assembled by the apparatus manufacturer using standard mobile hydraulic
components.
The PTO shall be a 10 bolt SAE type mounted to the PTO opening of the vehicle's Allison
transmission. The PTO shall be rated for at least 20 percent more torque throughput than the air
compressor drive system shall demand.
The air/oil separator for the compressor system shall be easily serviced. The separator shall be inside
a cast iron compressor base, receiver combination. The separator shall consist of two stages. The first
stage being a centrifuge arrangement engineered into the compressor base. The second stage shall
be a cartridge arrangement inside an enclosure featuring an "inside to outside" flow of the air through
the cartridge. The cartridge shall be serviceable by the removal of the compressor system minimum
pressure valve. The separation system shall be capable of at least 140 SCFM flow at 40 psi tank
pressure. The allowable oil carry over shall be no more than 10 parts per million oil in air.
A cast iron air/oil receiver tank shall be provided. The tank shall be constructed and tested to the
applicable standards as addressed by NFPA 1901 for CAF system air compressor tanks. The tank shall
be mounted in a manner that allows easy access to the fill opening and the level sight gauges. The
tank shall be of the vertical type with the minimum pressure valve of the compressor system integrated
into the top of the tank. The minimum pressure valve shall be rotatable to facilitate different discharge
arrangements from the tank.
The compressor lubricant shall be filtered by spin on type filter. The filter shall have a 25 Micron rating
and a safety bypass valve. The filter assembly shall be mounted and located in a manner that allows
easy service. A thermostat valve shall be integrated into the oil filter and compressor base
housing. The thermostat shall route lubricant to the oil cooler to maintain the compressor's
temperature between minimum and maximum limits.
A water/oil cooler shall be provided to cool the compressor. The cooler shall be sized to meet the duty
cycle requirements as specified.
A heavy duty, automotive type, dry element air cleaner shall be provided. The air cleaner shall be
mounted in such a manner as to be easily serviced. The air cleaner shall be mounted, or the inlet of
the filter routed, in such a manner that the air cleaner intakes fresh air from outside the vehicle
body. In addition, the compressor air intake shall be screened to prevent debris from entering the
filter housing.
The system shall have the following safety or monitoring devices.
Minimum pressure valve
Compressor lube temperature gauge
Compressor system pressure gauge
Air flow meter
Compressor lube temperature warnings, audible and visible
High pressure relief valve on receiver tank
Applicable warning and information decals