Compressor Discharge System, Functional Description - Sullair 185Tier 3 Kubota User Manual

185 T3 Kubota User Manual
thermal valve. Fluid circulation is achieved by forcing the
fluid from the high pressure region of the sump to a lower
pressure area in the compressor unit. A minimum pres-
sure device (see Section 2.5: Compressor discharge sys-
tem, functional description) is provided to assure
adequate fluid flow under all conditions. When entering
the thermal valve upon start-up, the fluid temperature is
cool and thus it is not necessary to route it through the
cooler. The fluid flows through the fluid filter and on to the
compressor unit bypassing the cooler. As the compressor
continues to operate, the temperature of the fluid rises
and the thermostatic control opens, allowing a portion of
the fluid into the cooler.
When the temperature reaches 170°F (77°C), the ther-
mostat is fully open allowing all fluid entering the thermal
valve to flow to the cooler.
The cooler is a radiator type that works in concert with
the engine fan. The fan pushes air through the cooler
removing the heat from the fluid. From the cooler, the
fluid is then routed back through the fluid filter. All fluid
1. Fluid cooler
2. Compressor
3. Thermal valve
Figure 2-2: Compressor cooling and lubrication system
02250223-054 R01
Subject to EAR, ECCN EAR99 and related export control restrictions.
flowing to the compressor unit passes through this filter.
The fluid leaving the filter flows to the compressor unit
where it lubricates, seals and cools the compression
chamber; and lubricates the bearings and gears.
2.5 Compressor discharge system,
functional description
Refer to Figure 2-3 on page 18. The Sullair compressor
unit discharges a compressed air/fluid mixture into the
receiver tank. The receiver tank has three functions:
• It acts as a primary fluid separator.
• Serves as the compressor fluid reservoir.
• Houses the air/fluid separator.
The compressed air/fluid mixture enters the receiver tank
and is directed against the side of the sump. Because of
a change of direction and reduction of velocity, large
droplets of fluid separate and fall to the bottom of the
sump. The small amount of fluid remaining in the com-
4. Fluid filter
5. Receiver tank
2: Description
17