Industrial TCDR-137 Hydraulic Cooler Temperature Switch

Description:

The TCDR-137 Hydraulic Cooler Temperature Switch (306-3) is used in hydraulic cooling systems to monitor oil temperature and automatically activate cooling fans when hydraulic fluid reaches a predetermined temperature. Commonly installed in hydraulic power units, mobile equipment, industrial machinery, concrete mixers, and oil cooler assemblies requiring automatic thermal management. Maintenance teams and hydraulic technicians use this switch for cooler fan control, overheating protection, and hydraulic system maintenance. The TCDR-137 series is a high-contact-capacity thermal switch designed specifically for hydraulic oil cooling applications.

Applications:

The TCDR-137 temperature switch is commonly used to control hydraulic cooler fans and prevent excessive oil temperatures that can reduce hydraulic component life and system performance. Typical applications include hydraulic power packs, concrete mixer trucks, mobile hydraulic equipment, industrial presses, material handling equipment, and oil-to-air heat exchangers requiring automatic fan activation based on fluid temperature. The switch remains open during normal operation and closes when the set temperature is reached, energizing the cooling fan circuit.

Technical Specifications:

• Manufacturer: Unbranded
• Model / Part Number: TCDR-137
• Reference Number: 306-3
• Product Type: Hydraulic Cooler Temperature Switch
• Switch Type: Thermal Switch / Thermostat
• Contact Configuration: Normally Open (NO)
• Operation: Close on Temperature Rise
• Temperature Setting: Typically 140°F or 180°F depending on suffix configuration
• Pressure Rating: 1000 PSI Maximum
• Thread Connection: 1/2" NPT Male (14 TPI)
• Body Material: Brass
• Electrical Connection: Dual Lead Wires
• Lead Length: 6 Inches
• Mounting Type: Threaded Direct Mount
• Media Compatibility: Hydraulic Oil and Compatible Fluids
• Application: Hydraulic Cooler Fan Control
• Hysteresis: Approximately 20°F depending on model
• Installation Location: Oil Cooler, Reservoir, or Hydraulic Piping
• Cooling Function: Automatic Fan Activation
• Environment Rating: Industrial Hydraulic Service
• Product Status: Discontinued OEM Component Available Through Surplus Channels.

Common Replacements:

• Therm-trol TCDR-137-A-0-180F Temperature Switch
• Thermal Transfer TCDR-137-140 Temperature Switch
• AKG Hydraulic Cooler Temperature Switch