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
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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.
Need More Help? Contact Us
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Description
Description
Description: A Backup Ring, also referred to as a support ring, is used to provide support for other seals and O-rings. It is installed on one or both sides of the primary seal and distributes the pressure more evenly, preventing the seal material from being forced into the gaps or clearances between mating surfaces.
Attributes: • Prevents the passage of fluids, gases, or contaminants • Manufactured to precise specifications and are built for durability, and reliability
Applications: A Backup Ring improves the efficiency of the Seals. It is widely used in Cat Articulated Truck, Asphalt Paver, Backhoe Loader, Bulldozer, Challenger, Cold Planer, Engine - Machine, Excavators, Generator, Generator Set, Load Haul Dump Loaders, Motor Graders, Pipelayer, Quick Couplers, Skid Steer Loaders, Track Loader, Track-type Tractor, Tractor, Truck, Wheel Dozer, Wheel Loader and Wheel Scraper.
Description: A Backup Ring, also referred to as a support ring, is used to provide support for other seals and O-rings. It is installed on one or both sides of the primary seal and distributes the pressure more evenly, preventing the seal material from being forced into the gaps or clearances between mating surfaces.
Attributes: • Prevents the passage of fluids, gases, or contaminants • Manufactured to precise specifications and are built for durability, and reliability
Applications: A Backup Ring improves the efficiency of the Seals. It is widely used in Cat Articulated Truck, Asphalt Paver, Backhoe Loader, Bulldozer, Challenger, Cold Planer, Engine - Machine, Excavators, Generator, Generator Set, Load Haul Dump Loaders, Motor Graders, Pipelayer, Quick Couplers, Skid Steer Loaders, Track Loader, Track-type Tractor, Tractor, Truck, Wheel Dozer, Wheel Loader and Wheel Scraper.
Material Description: Urethane Rubber has excellent abrasion and cut resistance, and works petroleum based lubricants and hydraulic fluids at moderate temperatures. Do not use with water-soluble fluids.
Cross Section Width (in): 0.04
Notes: Dimensions and Material Descriptions provided for reference only. Color may differ from image.
Cross Section Height (mm): 2.9
Cross Section Width (mm): 1.1
Cross Section Height (in): 0.11
Units of MeasureUSMetric
Axial Thickness (mm): 1.09
Inner Diameter (in): 3.49
Inner Diameter (mm): 88.55
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Compatible Models
Compatible Models
Wheel Tractor
621623B637631C633C633D613666B
Hydraulic Control
173B161143151191141181
Track Loader
941B951C951B941
Soil Compactor
815
Backhoe Loader
442D430D438D430F420D432D416D
Wheel Dozer
814
Motor Grader
1612014014G
Landfill Compactor
816
Winch
528
Backhoe
931D3
Compact Wheel Loader
908
Wheel Loader
920980B992B980L980M980982988950982M992
Wheel Skidder
518528
Track-Type Tractor
D3BD7GD4HD4ED9GD5HD6H
Pipelayer
561C
Truck
769769B769D769C
Quarry Truck
771D771C
Tractor
768C768B
Gas Engine
G398
Bulldozer
3S3P
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Wheel Tractor
621623B637631C633C633D613666B
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 1S-0669
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DiagramDescriptionSpecificationsCompatible Models
Parts diagram for 1S-0669
View Detailed Parts Diagrams
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Description for part number 1S-0669
Description: A Backup Ring, also referred to as a support ring, is used to provide support for other seals and O-rings. It is installed on one or both sides of the primary seal and distributes the pressure more evenly, preventing the seal material from being forced into the gaps or clearances between mating surfaces.
Attributes: • Prevents the passage of fluids, gases, or contaminants • Manufactured to precise specifications and are built for durability, and reliability
Applications: A Backup Ring improves the efficiency of the Seals. It is widely used in Cat Articulated Truck, Asphalt Paver, Backhoe Loader, Bulldozer, Challenger, Cold Planer, Engine - Machine, Excavators, Generator, Generator Set, Load Haul Dump Loaders, Motor Graders, Pipelayer, Quick Couplers, Skid Steer Loaders, Track Loader, Track-type Tractor, Tractor, Truck, Wheel Dozer, Wheel Loader and Wheel Scraper.
Material Description: Urethane Rubber has excellent abrasion and cut resistance, and works petroleum based lubricants and hydraulic fluids at moderate temperatures. Do not use with water-soluble fluids.
Cross Section Width (in): 0.04
Notes: Dimensions and Material Descriptions provided for reference only. Color may differ from image.
Cross Section Height (mm): 2.9
Cross Section Width (mm): 1.1
Cross Section Height (in): 0.11
View More
Compatible Models for part number 1S-0669
WHEEL TRACTOR
621 623B 637 631C 633C 633D 613 666B
HYDRAULIC CONTROL
173B 161 143 151 191 141 181
TRACK LOADER
941B 951C 951B 941
SOIL COMPACTOR
815
BACKHOE LOADER
442D 430D 438D 430F 420D 432D 416D
WHEEL DOZER
814
MOTOR GRADER
16 120 140 14G
LANDFILL COMPACTOR
816
WINCH
528
BACKHOE
931 D3
COMPACT WHEEL LOADER
908
WHEEL LOADER
920 980B 992B 980L 980M 980 982 988 950 982M 992
WHEEL SKIDDER
518 528
TRACK-TYPE TRACTOR
D3B D7G D4H D4E D9G D5H D6H
PIPELAYER
561C
TRUCK
769 769B 769D 769C
QUARRY TRUCK
771D 771C
TRACTOR
768C 768B
GAS ENGINE
G398
BULLDOZER
3S 3P
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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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