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SILICONE O-RING KIT (CAT EQUIVALENT P/N 4C-8253)

SILICONE O-RING KIT (CAT EQUIVALENT P/N 4C-8253)

  • Hi-temp silicone o-rings
  • OEM quality
  • 149pc kit

Kit Includes 

  • 8M-5010 – 3 pcsAvailability: 54 in stock

    $220.00 AUD
    $220.00 AUD
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  • Description
  • Hi-temp silicone o-rings
  • OEM quality
  • 149pc kit

Kit Includes 

  • 8M-5010 – 3 pcs

  • 8M-4435 – 5 pcs

  • 8M-4437 – 10 pcs

  • 8M-4445 – 5 pcs

  • 8M-4438 – 5 pcs

  • 8M-8157 – 5 pcs

  • 8M-5252 – 3 pcs

  • 8M-4436 – 3 pcs

  • 9M-4849 – 5 pcs

  • 8M-4991 – 3 pcs

  • 9M-7002 – 3 pcs

  • 9M-6067 – 5 pcs

  • 9M-9647 – 3 pcs

  • 8M-4433 – 3 pcs

  • 15-0004 – 5 pcs

  • 8M-4990 – 3 pcs

  • 8M-5248 – 5 pcs

  • 8M-4992 – 3 pcs

  • 2S-2251 – 5 pcs

  • 8M-5661 – 3 pcs

  • 8M-4986 – 5 pcs

  • 8M-5254 – 5 pcs

  • 8M-8283 – 3 pcs

  • 8M-4987 – 10 pcs

  • 6L-1651 – 3 pcs

  • 8M-5249 – 5 pcs

  • 8M-4446 – 5 pcs

  • 8M-4988 – 5 pcs

  • 8M-4432 – 5 pcs

  • 8M-4389 – 5 pcs

  • 8M-8515 – 5 pcs

  • 8M-4390 – 3 pcs

Uses of High-Temperature Silicone O-Rings in Earthmoving Equipment

High-temperature silicone (VMQ/PVMQ) O-rings are commonly used in earthmoving and heavy-diesel applications where sealing components must withstand elevated temperatures while maintaining flexibility and stability.

Where High-Temp Silicone O-Rings Are Commonly Used

  • High-heat, low-pressure sealing points such as certain transmission, torque-converter, and driveline service locations.

  • Static seals in areas exposed to substantial radiant or conductive heat (near exhaust components, turbo systems, or high-temperature housings).

  • Environmental and weather-exposed seals needing excellent ozone, UV and aging resistance.

  • Components subject to frequent temperature fluctuations, where silicone’s low-temperature flexibility helps maintain seal integrity.

Why Silicone Is Selected

  • Excellent high-temperature resistance—typically up to around 200 °C, depending on compound grade.

  • Superior low-temperature flexibility compared with many other elastomers.

  • Strong resistance to ozone, oxygen, and long-term weather exposure, making it suitable for equipment that operates outdoors in harsh environments.

  • Good compression-set properties, allowing the seal to maintain shape and performance under prolonged heat.

Limitations and When Not to Use Silicone

  • Not ideal for high-pressure hydraulic circuits where sealing stress is high; other elastomers generally perform better under high pressure.

  • Reduced resistance to petroleum-based oils and fuels compared with materials such as nitrile, HNBR or FKM.

  • Less suited to dynamic sealing surfaces with continuous movement or abrasive contamination.

Practical Examples in Earthmoving Equipment

  • Heat-exposed transmission or converter housings with moderate pressure.

  • Static covers, access plates, inspection ports, and similar components that encounter heat but minimal oil immersion.

  • Auxiliary systems where temperature is the main stress factor rather than pressure or fluid type.

Material-Selection Guidance

  • Use silicone O-rings for high-temperature, low-pressure, low-oil-exposure sealing environments.

  • For high-pressure or oil-immersed applications, select other elastomers designed for fuel and hydraulic-oil compatibility.

  • Always match seal material to the specific operating conditions—temperature, pressure, fluid type, and mechanical load.