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)
Material Hardness: 75A
Dash Size: 357
Seal/O-Ring Type: Standard
Primary Sealing Material: Rubber
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Compatible Models for part number 9M-3786
PUMPER
SPT343
UNDERGROUND ART TRUCK
AD55 AD30
GENERATOR
SR4 SR4BHV SR4B
TRUCK ENGINE
3406C 3406B C-18 C-15 3406
POWER MODULE
PM3456
LOAD HAUL DUMP
R2900G R2900
MARINE PRODUCTS
3512B
REMAN ENGINE
3406E
OFF HIGHWAY TRUCK
3508B
MATERIAL HANDLER
MH3260
TRACK-TYPE TRACTOR
D7F D7G D5 D8T D9R D6R II D4D D4E SR D4E D5B D6E SR D6C D6D D6H
336E LN 330D MH 336 GC 323F SA 336D 336E 320E LRR 325F LCR M325D MH 330D LN 340D2 L 349E L 323 345D L VG 336D LN 340D L 336 345C 345D 345D L 320D2 FM 330C LN 320D 365C L 330C L 336D L 374D L 375-A 336D2 568 FM 245 330C FM 330C 330D 245B 365B L 345C MH M325D L MH 330D L 365C 336E L 349E 320E RR 365B 345 GC
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 9M-3786
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Description for part number 9M-3786
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)
Material Hardness: 75A
Dash Size: 357
Seal/O-Ring Type: Standard
Primary Sealing Material: Rubber
View More
Compatible Models for part number 9M-3786
PUMPER
SPT343
UNDERGROUND ART TRUCK
AD55 AD30
GENERATOR
SR4 SR4BHV SR4B
TRUCK ENGINE
3406C 3406B C-18 C-15 3406
POWER MODULE
PM3456
LOAD HAUL DUMP
R2900G R2900
MARINE PRODUCTS
3512B
REMAN ENGINE
3406E
OFF HIGHWAY TRUCK
3508B
MATERIAL HANDLER
MH3260
TRACK-TYPE TRACTOR
D7F D7G D5 D8T D9R D6R II D4D D4E SR D4E D5B D6E SR D6C D6D D6H
336E LN 330D MH 336 GC 323F SA 336D 336E 320E LRR 325F LCR M325D MH 330D LN 340D2 L 349E L 323 345D L VG 336D LN 340D L 336 345C 345D 345D L 320D2 FM 330C LN 320D 365C L 330C L 336D L 374D L 375-A 336D2 568 FM 245 330C FM 330C 330D 245B 365B L 345C MH M325D L MH 330D L 365C 336E L 349E 320E RR 365B 345 GC
