CAT 165-8079 101.6mm Outer Diameter Spring Retainer

CAT 165-8079 is a Caterpillar spring retainer for oil filter housings, compatible with Cat C4.4, C6.6, and other engines. Its core function is to secure the spring inside the filter housing, ensuring a continuous and stable pressure on the filter element, guaranteeing sealing and filtration efficiency, and preventing the spring from shifting due to engine vibration in Cat® Parts. The following is structured technical and application information:

Core Technical Parameters

Item Details
Basic Attributes
Model 165-8079, Type: Spring retainer, Material: S45C carbon steel, galvanized and passivated for corrosion resistance, Single weight: approximately 0.2 kg, Operating temperature: -40℃ to +120℃, Suitable spring diameter: 12 mm, Installation preload: 15-20 N, Ultimate tensile strength: ≥500 N

Key Dimensions
Outer diameter: 101.6 mm (tolerance 0/-0.02 mm), Inner diameter: 90.0 mm (tolerance 0/+0.03 mm), Thickness: 12.0 mm (tolerance ±0.10 mm), Positioning flange height: 3.0 mm, Fixing groove width: 12.5 mm (tolerance +0.10/+0.05 mm), Spring fit clearance: 0.02-0.04 mm, Housing flatness: ≤0.03 mm

Compatible Models and Applications
Compatible For Cat C4.4, C6.6, and C7.1 engines, this oil filter is used inside the housing. Compatible filter elements include 1R-1807 and 1R-1808, suitable for engine speeds of 0-3000 rpm, ensuring stable sealing pressure between the filter element and the housing end face.

Performance Parameters: Fatigue strength ≥400 MPa, salt spray corrosion resistance meets ISO 9227 standard (no rust after 24 hours), working pressure range 0-1.2 MPa, spring fixation offset ≤0.5 mm, ensuring filter element sealing surface pressure fluctuation ≤0.1 MPa.

Structural and Performance Advantages: Carbon steel material with galvanized passivation treatment, balancing strength and corrosion resistance, suitable for harsh engine conditions with high temperatures and high oil mist, extending service life.

Precise outer and inner diameter design ensures strong compatibility with the filter housing and spring, effectively preventing spring misalignment during vibration and ensuring filter element sealing performance.

The positioning flange structure ensures quick positioning during installation, simplifying the assembly process, improving maintenance efficiency, and reducing the risk of assembly errors.

Standardized design ensures good compatibility with original equipment manufacturer (OEM) filter housings and springs, resulting in low maintenance and replacement costs and ensuring stable operation of the engine oil filtration system.

Installation and Maintenance Points: Before installation, clean the surfaces of the retainer and filter housing, checking for cracks and burrs. Insert the retainer into the spring, ensuring the spring is fully embedded in the retaining groove. During installation, gently press the retainer onto the housing’s positioning step to ensure a tight fit without looseness.

After installation, check that the spring compression meets requirements (approximately 5-8 mm), the retainer is not misaligned, the filter element’s sealing surface fits well, and there are no leaks. After starting the engine, check that the oil pressure is normal and there is no abnormal noise.

Maintenance: Check the retainer’s condition every 500 hours. If deformation, corrosion, or loose spring fixation is observed, replace it immediately. Use OEM parts for replacement; do not mix retainers of different models to avoid affecting the filtration system’s performance.