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.
Need More Help? Contact Us
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.
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 1,3-Butadiene, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
Material Description: Nitrile (NBR) rubber is capable of service temperatures of -40 to 100C and is resistant to fuel oils, gasoline, ultra low sulfur diesel fuel and lubricants. Nitrile rubber is not recommended for applications that require resistance to bio-diesel or coolant.
Notes: Dimensions and material descriptions provided for reference only.
Polymer: NBR (Nitrile butadiene)
Applications: Ambient temperature fuel handling; High and low pressure LPG service; Hydraulic fluids (to 10,335 kPa/1,500 psi); Power steering seals; Radiator thermostat seals
Material Hardness: 90A
Not Compatible With: Automotive and aircraft brake fluids; High levels of ozone; Ketones; Phosphate ester fluids; Strong acids; UV light
Compatible With: Abrasion resistant; Alpha-Olefin base synthetic lubricants; Ethylene Glycol; Hydrocarbon fuels; Petroleum base lubricants; Silicone oils and greases; Water, water base engine coolants; ORFS, STORS seals
Temperature (°C): -40 - 100
Dash Size: 219
Temperature (°F): -40 - 212
Seal/O-Ring Type: Standard
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Compatible Models for part number 4J-0520
PUMPER
CPT372 SPT343 SPT342
GENERATOR
SR4
UNDERGROUND ART TRUCK
AE40 AD55 AD30 AD45 AD40
TRUCK ENGINE
1673C 3306B 3306
INTEGRATED TOOLCARRIER
IT12B IT14G IT28G IT28F IT28B IT18B
LOAD HAUL DUMP
R1600G R1700G R1700 II R2900G R1300 R1600 R2900
CRUSHER
CR28
MOTOR GRADER
120G 16 120K 163H 140H 140G 130G 143H 163H NA 140H ES 140H NA 140 14G 14E 12H 12G 120 160K 160H 12F 160H NA
320-A L 320-A N 336D 324D 325C L 385C FS 345C 321B 312B L 385C L 365C L MH 315C 336D L 374D L 350-A L 350 L 325C M325D MH 345C L 385B 385C 345D L 320N 320B 320C 235B 320B L 245B 320 L M325D L MH 365C 390D L 330C L 225 235 320-A 215 330C LN 385C L MH 375-A 245 M312 M315
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 1,3-Butadiene, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
Material Description: Nitrile (NBR) rubber is capable of service temperatures of -40 to 100C and is resistant to fuel oils, gasoline, ultra low sulfur diesel fuel and lubricants. Nitrile rubber is not recommended for applications that require resistance to bio-diesel or coolant.
Notes: Dimensions and material descriptions provided for reference only.
Polymer: NBR (Nitrile butadiene)
Applications: Ambient temperature fuel handling; High and low pressure LPG service; Hydraulic fluids (to 10,335 kPa/1,500 psi); Power steering seals; Radiator thermostat seals
Material Hardness: 90A
Not Compatible With: Automotive and aircraft brake fluids; High levels of ozone; Ketones; Phosphate ester fluids; Strong acids; UV light
Compatible With: Abrasion resistant; Alpha-Olefin base synthetic lubricants; Ethylene Glycol; Hydrocarbon fuels; Petroleum base lubricants; Silicone oils and greases; Water, water base engine coolants; ORFS, STORS seals
Temperature (°C): -40 - 100
Dash Size: 219
Temperature (°F): -40 - 212
Seal/O-Ring Type: Standard
View More
Compatible Models for part number 4J-0520
PUMPER
CPT372 SPT343 SPT342
GENERATOR
SR4
UNDERGROUND ART TRUCK
AE40 AD55 AD30 AD45 AD40
TRUCK ENGINE
1673C 3306B 3306
INTEGRATED TOOLCARRIER
IT12B IT14G IT28G IT28F IT28B IT18B
LOAD HAUL DUMP
R1600G R1700G R1700 II R2900G R1300 R1600 R2900
CRUSHER
CR28
MOTOR GRADER
120G 16 120K 163H 140H 140G 130G 143H 163H NA 140H ES 140H NA 140 14G 14E 12H 12G 120 160K 160H 12F 160H NA
320-A L 320-A N 336D 324D 325C L 385C FS 345C 321B 312B L 385C L 365C L MH 315C 336D L 374D L 350-A L 350 L 325C M325D MH 345C L 385B 385C 345D L 320N 320B 320C 235B 320B L 245B 320 L M325D L MH 365C 390D L 330C L 225 235 320-A 215 330C LN 385C L MH 375-A 245 M312 M315
270-1545: SAE Code 61/62 Flange Seal Kit (90A Nitrile)
O-Ring Seal Kit: 6 Sizes, 60 Seals, Nitrile, 90 Duro
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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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