CAT 385-9617 Final Drive Retainer

CAT 385-9617 (3859617) is a Caterpillar J-Series Excavator (GET) dual-coil retainer, compatible with J400/J600 series bucket teeth/tooth holders of CAT excavators and loaders. It is used to lock the bucket tooth pins, preventing them from loosening or falling off during operation, ensuring bucket digging efficiency and component lifespan. The following are the core information:

Core Technical Parameters
Item Details
Part Model: CAT 385-9617 (3859617) J-Series Dual-Coil Bucket Tooth Retainer (Compatible with J400/J600 series bucket tooth pins, replaces some 132-0999/149-5733 retainers)

Core Material: Spring steel (60Si2MnA), quenching hardness HRC 45–50, surface galvanized passivation for corrosion and wear resistance; dual-coil structure, gripping force is 1.8 times that of a standard single-coil retainer.

Key Dimensions: Width 28 Dimensions: mm, length 32 mm, thickness 10 mm, coil inner diameter 12 mm, matching pin diameter 12–14 mm, mounting groove width 10 mm (tolerance +0.1–+0.2 mm), elastic deformation ≤5 mm (no breakage after 1000 cycles)

Single weight: Approx. 0.12 kg

Compatible models: CAT 336GC/349F excavator (standard bucket/rock bucket), 988K loader (bucket teeth), D11 bulldozer (ripper teeth), compatible with J400/J600 series bucket teeth pins, for heavy-duty excavation/loading conditions

Operating adaptability: Operating temperature -20℃ to +80℃, impact load resistance 50 kN, lateral load resistance 30 kN, suitable for soil/rock/ For abrasive applications such as ore:

Core Functions and Structural Features

Double-Coil Strong Grip: The double-helix coil design provides significantly stronger grip on the bucket tooth pin than a standard single-coil retainer, reducing pin movement, preventing tooth detachment, and adapting to heavy-duty excavation conditions with high lateral loads.

Anti-Extension and Wear Resistance: The helical spring seat absorbs lateral loads, preventing retainer extension; the galvanized passivation treatment provides wear and corrosion resistance, extending service life.

Anti-Rotation Positioning: After installation, the retainer cannot rotate, reducing friction and wear between the pin and the retainer, ensuring long-term fixation.

High Compatibility: Compatible with J400/J600 series bucket teeth and tooth seats, and can be used with standard pins, improving bucket operating efficiency and component lifespan.

Installation and Maintenance Points

Installation Specifications: Clean the bucket tooth pin mounting slot, 10 mm wide (tolerance +0.1–+0.2 mm), free of burrs and rust, ensuring the retainer is properly seated.

Align the retainer coil with the pin hole and gently tap it with a rubber mallet until fully embedded, ensuring both coils are firmly seated in the pin groove without any looseness (pulling the pin should not cause displacement).

After installation, check the fit between the retainer and the pin to ensure there are no gaps and prevent it from falling off during operation.

Maintenance Recommendations: Every 200 working hours, check for deformation or breakage of the retainer, and for looseness between the pin and the retainer. Replace immediately if any problems are found.

When replacing, prioritize replacing the retainer and bucket tooth pin as a complete set to avoid poor fit between old and new parts that could lead to fixing failure.

Avoid using with non-J series bucket teeth (such as H series) to prevent size mismatch from affecting the fixing effect.