CAT 116-3816 RETAINER

CAT 116-3816 is a Caterpillar original shaft retaining ring (E-type retaining ring) used to fix the axial position of components such as hydraulic pumps and gearboxes. The following is pure original data and does not include replacement parts information.

Core Technical Parameters (Raw Data)

Item Details
Basic Attributes Model 116-3816, Type: Shaft E-type Elastic Retaining Ring, Material: 65Mn Spring Steel, Surface: Galvanized and Passivated (No Red Rust After 96 Hours Salt Spray), Single Weight: 0.012 kg, Operating Temperature: -40℃ to +120℃, Fits Shaft Diameter: φ45 mm, Axial Load: ≤6 kN, Complies with Standard GB/T 894.1-2017 Cat® Parts
Key Dimensions Inner Diameter: 43.5 mm (1.713 in), Outer Diameter: 49.5 mm (1.949 in), Thickness: 1.2 mm (0.047 in), Opening Width: 3.0 mm, Opening Clearance: 1.5 mm, Inner Diameter Tolerance: +0.20/-0.05 mm, Outer Diameter Tolerance: +0.15/-0.05 mm, Thickness Tolerance: ±0.10 mm, flatness ≤0.06 mm, elastic deformation ≤0.4 mm (1000 cycles)

Compatible Models and Parts: Compatible with Cat 325D/330D excavator hydraulic pump drive shaft, C13 engine fan bearing end, and 966H loader gearbox output shaft. One piece per location to prevent axial movement of components. Uses with shaft grooves.

Performance Parameters: Rockwell hardness HRC 44-49, elastic limit ≥850 MPa, yield strength ≥950 MPa, breaking strength ≥1150 MPa, springback after installation ≥0.25 mm, impact resistance ≥5000 cycles (impact load 2 kN)

Structural and Performance Advantages:
High elasticity material: 65Mn spring steel possesses excellent elasticity and toughness, suitable for vibration conditions, and not easily deformed or broken.

Zinc plating and passivation treatment: Strong corrosion resistance, suitable for dusty and humid environments in construction machinery, extending service life.

Precision dimensional tolerances: Accurately fits the shaft groove, ensuring secure axial positioning and eliminating the risk of loosening.

E-shaped opening design: Compatible with dedicated snap ring pliers for quick installation and removal, suitable for operation in confined spaces.

Installation and maintenance points (raw data)

Installation: Clean the shaft groove and retaining ring. Use external snap ring pliers to open the retaining ring and insert it into the shaft groove, ensuring it is fully embedded in the bottom of the groove. Check that the gap between the retaining ring and the end face of the component is ≤0.12 mm. Do not strike with hard objects.

Maintenance: Every 2500 hours, check for retaining ring deformation, corrosion, and shaft groove wear (groove depth wear ≤0.06 mm). Replace immediately if cracks, deformation, or red rust are found.

Troubleshooting: For a broken retaining ring, replace it and check the shaft groove dimensions; for axial movement, check the installation position and groove width compatibility; for severe corrosion, replace the retaining ring and improve protection.