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HomeHardware, Seals, & ConsumablesSeals, Gaskets, & O-RingsBackup Rings4M-3948: 132.68mm Internal Diameter Ring
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Hardware, Seals, & ConsumablesSeals, Gaskets, & O-RingsBackup Rings4M-3948: 132.68mm Internal Diameter Ring
4M-3948: 132.68mm Internal Diameter Ring

Seal Ring

Brand: Cat

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4M-3948: 132.68mm Internal Diameter Ring
4M-3948: 132.68mm Internal Diameter Ring
4M-3948: 132.68mm Internal Diameter Ring
4M-3948: 132.68mm Internal Diameter Ring
4M-3948: 132.68mm Internal Diameter Ring

Seal Ring

Brand: Cat

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Description
Description

Description:
Backup Rings prevent seal extrusion in high pressure applications, and may be used to protect the life of overall sealing system from pressure surges.

Attributes:
Cat® Backup Rings are designed in conjunction with the elastomeric seal and mating components, and contribute significantly to the life and performance of the sealing system in high pressure applications.

Backup ring dimensions are consistently held to tight tolerances to ensure they properly bridge the seal groove and the mating surface. Materials are selected for their pressure and abrasion resistance.

Backup rings may be solid or split. Split rings are used for ease of assembly.

Cat Sealing systems protect more expensive parts from leaks and contamination. Protect your investment with Genuine Cat Seals.

Applications:
Backup rings are used in high pressure static and dynamic sealing applications, such as hydraulic pumps, valves and engine systems.

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.

Description:
Backup Rings prevent seal extrusion in high pressure applications, and may be used to protect the life of overall sealing system from pressure surges.

Attributes:
Cat® Backup Rings are designed in conjunction with the elastomeric seal and mating components, and contribute significantly to the life and performance of the sealing system in high pressure applications.

Backup ring dimensions are consistently held to tight tolerances to ensure they properly bridge the seal groove and the mating surface. Materials are selected for their pressure and abrasion resistance.

Backup rings may be solid or split. Split rings are used for ease of assembly.

Cat Sealing systems protect more expensive parts from leaks and contamination. Protect your investment with Genuine Cat Seals.

Applications:
Backup rings are used in high pressure static and dynamic sealing applications, such as hydraulic pumps, valves and engine systems.

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.
Specifications
Specifications
Units of MeasureUSMetric
Material Description: PTFE provides superior performance in Air, Engine Oil, Diesel Fuel and Coolant applications, but is sensitive to installation damage and debris. It works well at very high temperatures.
Cross Section Width (in): 0.18
Notes: Dimensions and Material Descriptions provided for reference only. Color may differ from image.
Cross Section Width (mm): 4.6
Cross Section Height (mm): 3.5
Material: PTFE - Polytetrafluoroethylene,Polytetrafluoroethylene (PTFE) Plastic
Inside Diameter (mm): 132.7
Inside Diameter (in): 5.22
Cross Section Height (in): 0.14
Units of MeasureUSMetric
Material Description: PTFE provides superior performance in Air, Engine Oil, Diesel Fuel and Coolant applications, but is sensitive to installation damage and debris. It works well at very high temperatures.
Cross Section Width (in): 0.18
Notes: Dimensions and Material Descriptions provided for reference only. Color may differ from image.
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Compatible Models
Compatible Models
Track-Type Tractor
D6ED7FD6G SRD7GD6F SRD6GD6D SRD6E SRD6G2 XLD6CD6DD6G2 LGPD7G2
Pipelayer
571G572G
Hydraulic Control
143141140
Track Loader
983B977K977L983
Track-Type Loader
977K
View More
Track-Type Tractor
D6ED7FD6G SRD7GD6F SRD6GD6D SRD6E SRD6G2 XLD6CD6DD6G2 LGPD7G2
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Parts diagram for 4M-3948
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DiagramDescriptionSpecificationsCompatible Models
Parts diagram for 4M-3948
View Detailed Parts Diagrams
Add Your Equipment
Description for part number 4M-3948

Description:
Backup Rings prevent seal extrusion in high pressure applications, and may be used to protect the life of overall sealing system from pressure surges.

Attributes:
Cat® Backup Rings are designed in conjunction with the elastomeric seal and mating components, and contribute significantly to the life and performance of the sealing system in high pressure applications.

Backup ring dimensions are consistently held to tight tolerances to ensure they properly bridge the seal groove and the mating surface. Materials are selected for their pressure and abrasion resistance.

Backup rings may be solid or split. Split rings are used for ease of assembly.

Cat Sealing systems protect more expensive parts from leaks and contamination. Protect your investment with Genuine Cat Seals.

Applications:
Backup rings are used in high pressure static and dynamic sealing applications, such as hydraulic pumps, valves and engine systems.

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.
Specifications for part number 4M-3948

Units of Measure

USMetric
Material Description: PTFE provides superior performance in Air, Engine Oil, Diesel Fuel and Coolant applications, but is sensitive to installation damage and debris. It works well at very high temperatures.
Cross Section Width (in): 0.18
Notes: Dimensions and Material Descriptions provided for reference only. Color may differ from image.
Cross Section Width (mm): 4.6
Cross Section Height (mm): 3.5
Material: PTFE - Polytetrafluoroethylene,Polytetrafluoroethylene (PTFE) Plastic
Inside Diameter (mm): 132.7
Inside Diameter (in): 5.22
Cross Section Height (in): 0.14
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Compatible Models for part number 4M-3948

TRACK-TYPE TRACTOR

D6E D7F D6G SR D7G D6F SR D6G D6D SR D6E SR D6G2 XL D6C D6D D6G2 LGP D7G2

PIPELAYER

571G 572G

HYDRAULIC CONTROL

143 141 140

TRACK LOADER

983B 977K 977L 983

TRACK-TYPE LOADER

977K

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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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