CAT 165-8318 RETAINER

CAT 165-8318 is a Caterpillar genuine bucket tooth holder locking pin retainer (also known as a bucket tooth quick-lock pin), used for quick locking of the bucket tooth holder and bucket teeth in excavators, loaders, and other equipment, preventing the bucket teeth from falling off during operation, and suitable for high-frequency impact and wear environments under heavy-duty working conditions. The following are the key information.

Core Technical Parameters

Item Details
Part Model: CAT 165-8318 (Bucket Tooth Seat Locking Pin Fixer, Single Piece)

Material: 40Cr alloy steel, integrally quenched, hardness HRC 45-50, blackened surface + anodized treatment, rust-proof and wear-resistant, strong impact resistance

Key Dimensions: Overall length approx. 85mm, pin diameter approx. 16mm, lock head diameter approx. 22mm, opening elastic width approx. 5mm, fits 16mm diameter tooth seat mounting hole

Single Weight: Approx. 0.25kg (0.55 lbs)

Compatible Models: Standard bucket and rock bucket tooth seats for CAT 320D/323D/336D excavators, 950H/966H loaders, D6N bulldozers, etc.

Performance Characteristics: Operating temperature -40℃ to + 150℃, rated tensile strength ≥80kN, elastic locking design, anti-loosening after assembly, suitable for heavy-duty excavation and loading conditions.

Structure and Core Functions

Quick Locking: Utilizes an elastic open locking pin structure. After insertion into the mounting holes of the tooth holder and bucket teeth, the lock head automatically springs open, achieving quick locking of the bucket teeth and tooth holder without additional tools, improving replacement efficiency and meeting the needs of rapid on-site maintenance.

Anti-Loss Protection: The locking pin precisely matches the tooth holder hole, maintaining stable locking under vibration and impact conditions, preventing the bucket teeth from falling off, avoiding equipment damage and safety accidents, and ensuring continuous operation.

Wear-Resistant and Durable: Made of alloy steel with quenching treatment and an anti-oxidation coating, extending service life and suitable for high-frequency wear in harsh working environments such as those involving ores and construction waste.

Easy Disassembly: The locking pin can be quickly removed using a dedicated pin puller, facilitating bucket tooth replacement and maintenance, reducing downtime, and improving equipment utilization.

Suitable Scenarios and Installation/Maintenance Points

Suitable Scenarios: Used for fixing bucket teeth on excavators, loaders, and other equipment. Suitable for heavy-duty excavation, mining, road construction, and other high-frequency impact and wear operations, ensuring stable operation of the bucket teeth.

Installation Specifications: Clean the mounting holes of the tooth holder and bucket teeth, ensuring they are free of burrs, oil, and rust. Check that the locking pin matches the size of the mounting hole to ensure smooth insertion.

Align the locking pin with the mounting hole and insert it firmly until the lock head fully pops out. Confirm that the locking pin is locked in place without any signs of loosening.

Maintenance Recommendations: Before each operation, check the condition of the locking pin. Replace it immediately if deformation, cracks, wear exceeding 0.5mm, or decreased elasticity is observed to avoid the risk of bucket teeth falling off.

Regularly apply anti-rust grease to protect the surface of the locking pin, extend its service life, and suit outdoor humid and dusty conditions.

When replacing bucket teeth, check the wear of the tooth holder mounting holes. If the hole diameter wear exceeds 0.3mm, repair or replace the tooth holder to prevent the locking pin from loosening.