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1333715 Ring-Backup – Fits Caterpillar
1333715 Ring-Backup – Fits Caterpillar – additional image 21333715 Ring-Backup – Fits Caterpillar – additional image 3

NC-044797 · Tools & Other Engine Components

1333715 Ring-Backup – Fits Caterpillar

CAD 9.04

In stock

Ring-Backup – reference 1333715. Catalogue-listed applications: Caterpillar. View photos, specifications, CAD pricing and delivery options from NorthCore.

Standard delivery: 3–7 business days. Other services and estimates are shown at checkout. Minimum online order: CAD 100 in parts, excluding shipping and tax. Add this part to your cart to calculate delivery and review your order.

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Part specifications and references

NorthCore code
NC-044797
Reference numbers
1333715, C7
Listed package quantity
1
Product information and configuration
Quantity indicated in catalogue: 1

Replacement part: Ring-Backup Fits Caterpillar Models. 

Configuration: Ring-Backup for Caterpillar (Cat) Engines and EquipmentThis aftermarket replacement backup ring (Cat part number 133-3715 / 1333715) is used in the fuel injector assembly on Caterpillar 3126, C7, and related engines. The backup ring seats alongside O-ring seals on the electronic unit injector (EUI), providing a critical pressure seal that prevents high-pressure oil and fuel leakage in the injector bore. Proper installation of this ring is essential -- damaged or missing backup rings can cause excessive oil leakage under the valve cover, low actuation pressure, or high-pressure oil intrusion into the fuel supply passage.Specifications Inner Diameter: 35.53 mm Weight: 0.01 lbs Application: Fuel injector / electronic unit injector (EUI) backup ring Compatible ModelsCaterpillar Motor Graders: 120H, 135HCaterpillar Excavators: 322C, 322C FM, 325C, 325C FMCaterpillar Wheeled Excavators: M325C MHCaterpillar Wheel Loaders: 938G II, 950G II, 962G IICaterpillar Track Loaders: 953C, 963CCaterpillar Integrated Toolcarriers: IT38G II, IT62G IICaterpillar Track-Type Tractors: D5N, D6NCaterpillar Wheel Harvesters: 570B, 580BCaterpillar Pipelayers: 561NCaterpillar Engines (Truck/Industrial/Marine/Gen Set): 3126, 3126B, 3126E, C7Caterpillar Pumpers: SPP101Caterpillar Mobile Hydraulic Power Unit: 325CReplaces Part Number(s):1333715, 133-3715New aftermarket replacement part - not remanufactured, not used.

Reference numbers: 1333715, C7
Application notes
  • One New Aftermarket Replacement Ring-Backup for Caterpillar (Cat) Engines and EquipmentThis aftermarket replacement backup ring (Cat part number 133-3715 / 1333715) is used in the fuel injector assembly on Caterpillar 3126, C7, and related engines. The backup ring seats alongside O-ring seals on the electronic unit injector (EUI), providing a critical pressure seal that prevents high-pressure oil and fuel leakage in the injector bore. Proper installation of this ring is essential -- damaged or missing backup rings can cause excessive oil leakage under the valve cover, low actuation pressure, or high-pressure oil intrusion into the fuel supply passage.Specifications Inner Diameter: 35.53 mm Weight: 0.01 lbs Application: Fuel injector / electronic unit injector (EUI) backup ring Compatible ModelsCaterpillar Motor Graders: 120H, 135HCaterpillar Excavators: 322C, 322C FM, 325C, 325C FMCaterpillar Wheeled Excavators: M325C MHCaterpillar Wheel Loaders: 938G II, 950G II, 962G IICaterpillar Track Loaders: 953C, 963CCaterpillar Integrated Toolcarriers: IT38G II, IT62G IICaterpillar Track-Type Tractors: D5N, D6NCaterpillar Wheel Harvesters: 570B, 580BCaterpillar Pipelayers: 561NCaterpillar Engines (Truck/Industrial/Marine/Gen Set): 3126, 3126B, 3126E, C7Caterpillar Pumpers: SPP101Caterpillar Mobile Hydraulic Power Unit: 325CReplaces Part Number(s):1333715, 133-3715New aftermarket replacement part - not remanufactured, not used.

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