Fits Models At A Glance:
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Case Loader Backhoes: 580K, 580 Super K, 590 Turbo, 680L, 780D
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Case Crawler Dozers: 1150E, 1155E, 650G, 850E, 850G, 855E
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Case Wheel Loaders: 621, 621B, 721, 721B, 821, 821B, 921
Key Notes:
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Part Numbers: 92153C1, 234921A1, 20PS40-3, 1661273C1, 92038C1
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Type: Normally Open High Pressure Switch
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Thread Size: 7/16″–20 (1/4″ Female Flare Fitting)
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High Pressure Opens: 210 psi
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High Pressure Closes: 340 psi
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Weight: 0.05 kg (0.11 lbs)
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Application: Protects A/C compressor from excessive system pressure by interrupting the clutch circuit when pressure exceeds safe limits.
Compatible With:
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Refrigerants: R12 and R134a systems
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Switch Type: Pressure-activated, Normally Open configuration
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Use With: York, Sanden, and similar compressors on Case machines
Why Choose Broken Tractor:
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OEM-quality A/C protection switch
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Prevents compressor damage from overpressure
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Direct fit replacement for Case OEM switches
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Fast U.S. shipping and expert service support
