Generally, warranty for parts purchased on Parts.Cat.Com is 12 months from the invoice date as defined in the Caterpillar Limited Warranty. Parts Warranty covers defects in material and workmanship throughout the Warranty period once it has been installed. For complete Warranty detail contact your local Cat Dealer.
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Return Policy
Return Policy Information
Unless otherwise noted by a non-returnable part
icon, most parts can be returned to your authorized Cat® dealer under their return policy.
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Find a DealerEmail
Warranty Information
Warranty Information
Generally, warranty for parts purchased on Parts.Cat.Com is 12 months from the invoice date as defined in the Caterpillar Limited Warranty. Parts Warranty covers defects in material and workmanship throughout the Warranty period once it has been installed. For complete Warranty detail contact your local Cat Dealer.
Need More Help? Contact Us
Find a DealerEmail
Return Policy
Return Policy Information
Unless otherwise noted by a non-returnable part
icon, most parts can be returned to your authorized Cat® dealer under their return policy.
Need More Help? Contact Us
Find a DealerEmail
Parts diagram for 166-2904
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Description for part number 166-2904
Description: O-Rings are used in static sealing and some dynamic applications.
Attributes: Cat® O-Rings are made from materials that are matched to the fluids, temperatures and pressures found in Cat engines and machines. The materials resist wear and extrusion, and provide superior resistance to seal compression set. In addition, certain Cat O-Rings are coated with PTFE to minimize seal twisting and cutting during seal installation.
Dimensions of our O-Rings are consistently held to tight tolerances to ensure they fit properly into seal grooves with the necessary seal compression.
With over 2500 O-Rings in different sizes and materials, Cat O-Rings are your best solution for your Cat and other mobile equipment O-Ring needs.
Cat Sealing systems protect more expensive parts from leaks and contamination. Protect your investment with Genuine Cat Seals.
Applications: O-Rings are used in many static and dynamic joints throughout Cat machines and engines.
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Warning:This product can expose you to chemicals including Tetrafluoroethylene, which is known to the State of California to cause cancer, and Perfluorooctanoic acid (PFOA), which is known to the State of California to cause birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
Material Description: TFEP is capable of service temperatures of -10 to 150C and is primarily used where high temperature, water, coolant, and steam is encountered, as well as potential contact with fuel and other petroleum products.
Polymer: TFE/P (Tetrofluoroethylene/propylene)
Material Hardness: 80A
Dash Size: 126
Notes: Dimensions and Material Descriptions provided for reference only. Color may differ from image.
Seal/O-Ring Type: Standard
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Compatible Models for part number 166-2904
UNDERGROUND ART TRUCK
AD55 AD30
GENERATOR SET
C32
WHEEL TRACTOR
637E 631E
TRUCK ENGINE
3406E C-15 C-16 C13 C15
POWER MODULE
PM3456
LOAD HAUL DUMP
R2900G R2900
REMAN ENGINE
3406E
MOTOR GRADER
18
COMBAT VEHICLE ENGINE
C13
WHEEL LOADER
980 XE 966H 972H 980H 982 XE
MARINE ENGINE
3406E
INDUSTRIAL ENGINE
C13 C15 3456
WHEEL SCRAPER
657 657B
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KeyKey
Factory Fit
This part is designed to fit your Cat equipment based on the manufacturer’s specifications.
Any changes to the manufacturer’s configuration might result in the product not fitting your Cat equipment. Please consult your Cat Dealer before purchasing to ensure that this part is appropriate for your Cat equipment in its current condition and assumed configuration. This indicator cannot guarantee compatibility for all parts.
Remanufactured
Non-Returnable
Kit
Replaced
Remanufactured
Non-Returnable
Kit
Replaced
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DiagramDescriptionSpecificationsCompatible Models
Parts diagram for 166-2904
View Detailed Parts Diagrams
Add Your Equipment
Description for part number 166-2904
Description: O-Rings are used in static sealing and some dynamic applications.
Attributes: Cat® O-Rings are made from materials that are matched to the fluids, temperatures and pressures found in Cat engines and machines. The materials resist wear and extrusion, and provide superior resistance to seal compression set. In addition, certain Cat O-Rings are coated with PTFE to minimize seal twisting and cutting during seal installation.
Dimensions of our O-Rings are consistently held to tight tolerances to ensure they fit properly into seal grooves with the necessary seal compression.
With over 2500 O-Rings in different sizes and materials, Cat O-Rings are your best solution for your Cat and other mobile equipment O-Ring needs.
Cat Sealing systems protect more expensive parts from leaks and contamination. Protect your investment with Genuine Cat Seals.
Applications: O-Rings are used in many static and dynamic joints throughout Cat machines and engines.
View More
Warning:This product can expose you to chemicals including Tetrafluoroethylene, which is known to the State of California to cause cancer, and Perfluorooctanoic acid (PFOA), which is known to the State of California to cause birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
Material Description: TFEP is capable of service temperatures of -10 to 150C and is primarily used where high temperature, water, coolant, and steam is encountered, as well as potential contact with fuel and other petroleum products.
Polymer: TFE/P (Tetrofluoroethylene/propylene)
Material Hardness: 80A
Dash Size: 126
Notes: Dimensions and Material Descriptions provided for reference only. Color may differ from image.
