G2030-II-S
Apr ‘19
- 13
Maintenance Procedures (cont’d)
Repair Kit
Repair Kit
Thermo Valve Repair Kit.
The Thermostatic Valve, or commonly called ‘Thermo
Valve’, provides a means of re-directing the oil to be
cooled. At start-up, the oil travels from the Oil
Reservoir, through the Oil Filter, and into the Air End.
As the oil temperature reaches approx. 71°C (160°F),
the Thermo Valve re-directs the warm oil through the
Heat Exchanger, allowing it to cool before entering the
Oil Filter.
It is imperative that the Heat Exchanger be kept clean,
as a dirty Heat Exchanger will limit the cooling of the
To repair the Thermo Valve:
• Remove the End Cap from the assembly. As the Spring is compressed, caution must be taken when
removing the End Cap.
• Replace the O Ring, Thermostat & Collar, and Spring.
• Re-assemble.
The parts as indicated by the arrows (above – right) are included in the ‘DSC-111-1’ Thermo Valve Repair Kit.
End Cap
Spring
Minimum Pressure Valve Repair Kit.
The Minimum Pressure Valve has two purposes when
installed in the Rotary Screw Compressor Unit.
1. It allows the Unit to build up pressure (up to
approx. 65 psi (4.5 bar)) before allowing the
compressed air to flow through the cooler and
2. it acts as a ‘one way’ or ‘check’ Valve, stopping
air from flowing back from the Tank.
The Minimum Pressure Valve is defective and requires
repair if the Unit is
• shut down and
• air is bleeding from the Tank and
• air is bleeding out of the Unloader – Solenoid
Set Screw
End Cap
To repair the Minimum Pressure Valve:
• Remove the End Cap from the assembly. As the Spring is compressed, caution must be taken when
removing the End Cap.
• Do not remove or turn the Set Screw in the End Cap, as it has been preset at the factory.
• Replace the Plunger, Springs, and O Rings.
• Apply lubricant to moving parts.
• Re-assemble.
The parts as indicated by the arrows (above – right) are included in the ‘DSC-231’ Minimum Pressure Valve
Repair Kit.
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