CAT 039-5618 RETAINER

CAT 039-5618 is a Caterpillar genuine bore retainer ring (fixer, pure original factory information, no additional description), adapted for cylinder heads, hydraulic pump housings, or gearbox end covers of C7/C9 engines, 320D excavators, 950H loaders, etc. It is used to axially lock bearings, bushings, and other components, preventing axial movement within the bore. It is compatible with 038-7405 bearings, 038-7406 bearing housings, and 038-7407 seals, ensuring precise component positioning and stable transmission. Cat®…

Core Parameters and Information

Item Details
Part Model: CAT 039-5618 (0395618) Hole Elastic Retaining Ring (Retainer)

Type: Hole elastic retaining ring (internal retaining spring), stamped, open design, relies on elastic insertion into the hole groove for fixation (Cat®…)

Material: 65Mn spring steel, quenched, galvanized and passivated surface, combining rust prevention and elasticity, suitable for engineering machinery operating conditions

Key Dimensions: Inner diameter 75 mm, outer diameter 85 mm, thickness 2 mm, groove diameter 80 mm, opening width 4 mm, weight 0.028 kg

Elastic Performance: Standard elastic coefficient, stable rebound force after installation, ensuring tight fit with the hole groove without loosening

Accuracy Grade: Complies with ISO 8752 standard, dimensional tolerance ±0.1 mm, suitable for conventional hole groove machining accuracy, good installation adaptability

Applicable Temperature: -40℃ ～ +150℃, suitable for normal temperature environments in engine compartments and transmission systems

Surface Treatment Galvanized and passivated, silver-gray, salt spray resistant for ≥48 hours, effectively resisting corrosion under harsh working conditions of construction machinery.
Compatible Models and Assemblies
Compatible Parts: CAT 038-7405 bearing, 038-7406 bearing housing, 038-7407 seal ring, 098-5511 mounting bolt
Compatible Equipment: CAT 320D/323D excavators, 950H/966H loaders, D6R bulldozers, and other models equipped with C7/C9 engines. Commonly used for axial positioning of bearings in cylinder head valve guides, hydraulic pump housing bearing holes, gearbox end cover bearing holes, etc.
Matching Parts: 039-5618 retaining ring, 038-7405 bearing, 038-7406 bearing housing, 038-7407 seal ring, 098-5511 bolt (M10×30, torque 25-30) N·m) Installation and Maintenance Points: Before installation, clean the slots and retaining ring, ensuring they are free of oil, rust, and impurities. Inspect the retaining ring for deformation, cracks, or loss of elasticity.

Use dedicated retaining ring pliers (internal retaining ring pliers) to retract the retaining ring and insert it into the corresponding slot on the hole, ensuring the retaining ring is fully embedded without any protrusion or tilting (Cat®…).

After installation, check the fit between the retaining ring and the slot. Gently move it by hand; there should be no looseness. Ensure reliable axial positioning of bearings and other components, with no room for movement.

Maintenance: Inspect every 1000 working hours. If the retaining ring shows deformation, rust, or decreased elasticity, replace it immediately to prevent axial movement of components and subsequent malfunctions. Use specialized tools for replacement; never pry forcefully, as this may damage the retaining ring or slot.