1693104 Ring-Backup Fits Caterpillar Models

One New Aftermarket Replacement Backup Ring for Caterpillar (Cat) C7 / C9 Engine Fuel Injectors

This backup ring (part number 1693104 / 169-3104) is used in the fuel injector assembly on Caterpillar C7 and C9 HEUI diesel engines. Backup rings are thin rings designed to prevent extrusion of O-rings and seals under pressure during fuel injector operation. With an outer diameter of 37.65mm (max free state diameter 38.3mm / 1.507 in), this is a steel backup ring engineered for precise fitment in the injector bore.

Specifications

• Outer Diameter: 37.65 mm
• Max Free State Diameter: 38.3 mm (1.507 in)
• Material: Steel
• Application: Fuel injector backup ring

Compatible Models

Caterpillar C-Series Engines: C7, C9, C-9

Caterpillar Equipment (C7/C9-powered): Challenger MT735, MT745, MT755, MT765, MTC735, MTC745, MTC755, MTC765; Excavators 322C, 324D, 325C, 325D, 326D L, 328D LCR, 329D, 330C, 330D, 336D, 336D2, 340D, 340D2; Motor Graders 12H, 12K, 12M, 120H, 120K, 135H, 140G, 140K, 140M, 160K, 160M; Track-Type Tractors D5N, D6N, D6R, D6T, D7R; Wheel Loaders 938G II, 950G II, 950H, 962G II, 962H, 966F, 966F II; Track Loaders 953C, 963C, 973C, 973D; Asphalt Pavers AP-755, AP-1000D, AP-1055, AP-1055D, AP-1055F; Marine Engine 3126B, C7, C9; Industrial Engines 3126B, C7, C9; Generator Sets C9 GEN SET

Replaces Part Number(s):

1693104, 169-3104

New aftermarket replacement part - not remanufactured, not used.