SECTION 2: DESCRIPTION
AIR N ARC
®
300 SERIES ALL-IN-ONE POWER SYSTEM
®
PAGE - 26
090012-OP_r0
minimum of approximately 160°F (71°C). The elevated
temperature forces the moisture, which may be ingested
into the compressor system due to atmospheric humidity,
to stay in a state of vapor. This prevents the moisture
from condensing out in the system and contaminating the
lubricant.
The cooler core for the 300 Series Power System relies
on the cooling fan to draw fresh air from outside the
package across the core to cool the compressor
lubricant. The maximum lubricant temperature is
maintained by using an integral compressor thermal
valve.
The oil cooling system is composed of the following main
components:
2.3.1 COMPRESSOR TEMPERATURE AND
PRESSURE SWITCHES
See
Figure 2-8
.
The compressor is equipped with two
switches that can shut down the unit should over-limit
conditions occur. The temperature switch de-energizes
the clutch at 240°F (116°C). The pressure switch
disengages the clutch at 185 psi.
2.3.2 COMPRESSOR SPIN-ON OIL FILTER
See
Figure 2-9
. The compressor system is also supplied
with a spin-on oil filter, positioned off the lower corner of
the compressor. This element requires regular
replacement to prolong the life of the compressor
system. For routine maintenance of the spin-on filter,
consult
Sections 6.2
and
6.3
for maintenance schedules,
and
Section 6.6.4
for specific compressor oil filter
maintenance procedures.
2.4 ENGINE
See
Figure 2-10
. The 300 All-In-One Power System
features the Kubota Super Mini Series 25HP industrial
engine, which offers multi-cylinder, liquid-cooled
operation, with superior endurance and reliable
characteristics while being compliant with stringent Tier 4
emissions regulations. It powers both the compressor
unit and generators simultaneously. The engine has a full
flow oil filter, while also offering re-borable and
NOTE
Refer to the Engine Operator’s Manual
for engine service and maintenance
recommendations that are not provided
in this manual.
KEY
DESCRIPTION
A
COMPRESSOR UNIT
(reference)
B
PRESSURE SWITCH
C
TEMPERATURE SWITCH
Figure 2-8: Shutdown Switches
B
C
A
NOTE
Do not tamper with the governor setting
to increase the maximum engine speed.
Overspeed is hazardous and will void the
engine warranty.
