CAT 227-3619 RING

CAT 227-3619 is a Caterpillar original shaft snap ring (external retaining ring). It is an open-type metal elastic ring used to secure bearings, gears, flanges, and other components on shafts, preventing axial movement. It is compatible with various engineering machinery transmission and hydraulic systems, ensuring stable component positioning. Cat®… The following are key information.

Core Technical Parameters

Item Details
Part Model: CAT 227-3619 (Shaft Elastic Retaining Ring, Open Type, with Mounting Groove)
Material: 65Mn spring steel, quenched and tempered, surface galvanized and passivated or oxidized blackened, possessing high elasticity and corrosion resistance, suitable for engineering machinery operating conditions.
Key Dimensions: Inner diameter 50mm (1.969in), outer diameter 62mm (2.441in), thickness 2.5mm (0.098in), opening width 4mm (0.157in), suitable for 50mm standard journals, mounting groove width 2.6mm, groove diameter 58mm.
Compatible Models: Excavators 312D2, 313D2; Loaders 910K, 914K; Mini Roller CB34B; Engines C4.4, C6.6, used for hydraulic pump shaft ends, gearbox gear positioning, fan pulley fixing, etc.
Performance Characteristics It achieves rapid positioning and fixation by elastically snapping into the mounting groove on the shaft; installation and disassembly are convenient, requiring no additional fasteners; its excellent elasticity compensates for minor tolerances of the shaft and components, preventing axial movement.

Structure and Core Functions

Axial Positioning and Anti-Movement: Made of open-type spring steel, it snaps into a dedicated groove on the shaft during installation, using elastic tension to tightly adhere to the groove wall, fixing bearings, gears, and other components, preventing axial displacement, and avoiding component collisions and wear.

Rapid Assembly and Maintenance: No bolts, nuts, or other fasteners are required; installation and disassembly can be completed with snap ring pliers, significantly improving assembly efficiency, reducing maintenance time, and adapting to the frequent maintenance needs of construction machinery.

Tolerance Compensation and Adaptability: The spring steel material has good elasticity, adapting to minor dimensional tolerances of the shaft and components, ensuring reliable fixation, while avoiding component deformation caused by over-positioning, adapting to component positioning requirements under various working conditions.

Suitable Scenarios and Installation/Maintenance Points

Suitable Scenarios: Primarily used for the axial positioning of components such as hydraulic pump shafts, gearbox gears, fan pulleys, and steering knuckles in excavators, loaders, and road rollers. It is compatible with components with a shaft diameter of 50mm to prevent axial movement during operation.

Installation Specifications:

Before installation, clean the journal and mounting groove to ensure there are no burrs or rust. The groove width and diameter must meet tolerance requirements (groove width 2.6mm ± 0.1mm, groove diameter 58mm ± 0.1mm) to prevent loosening or deformation of the retaining ring after installation.

Use dedicated retaining ring pliers (external pliers) to pry open the retaining ring and smoothly insert it into the mounting groove. Do not use screwdrivers or other tools to pry it open, as this may deform or break the retaining ring, affecting the positioning effect.

After installation, check that the retaining ring is fully inserted into the groove, ensuring it fits snugly against the component end face without looseness or misalignment to prevent it from falling off during operation.

Maintenance Recommendations: Check the retaining ring every 1000-1500 working hours for deformation, rust, breakage, or loosening. Replace any faulty parts immediately to prevent axial movement and subsequent malfunctions.

Use specialized retaining ring pliers for disassembly to avoid damaging the retaining ring and journal. Spare parts must be stored in a sealed container to prevent moisture and rust, which could affect elasticity and installation accuracy.