CAT 2U-1594 CIRCLIP INT

CAT 2U-1594 is a Caterpillar original rectangular cross-section internal elastic retaining ring (for bores), suitable for axial positioning of bearings/gears in transmission components such as the Cat 950GC loader gearbox, the 140M grader rear axle differential, and the 320D excavator swing mechanism. The following is its core technology and application information:

Core Technical Parameters
Item Details
Basic Attributes
Model 2U-1594, type is a rectangular cross-section internal elastic retaining ring (for bores, conforming to ISO 7093-1 standard), suitable for Cat 950GC loader gearbox bearing positioning, 140M grader rear axle differential gear limit, and 320D excavator swing mechanism shaft end fixing, material is SAE 1070 spring steel (hardened HRC 48-52), surface anodized and passivated, operating temperature -40℃ to +120℃, single weight approximately 0.08 kg, rust resistance rating IP54, salt spray test ≥72 hours, axial load ≥8 kN, suitable for grease/oil lubrication.

Key Dimensions: Free diameter 85 mm (tolerance ±0.20 mm), suitable bore diameter 90 mm (tolerance H7, +0.040/0 mm), groove diameter 87 mm (tolerance ±0.10 mm), groove width 3.2 mm (tolerance +0.10/-0.05 mm), retaining ring thickness 3.0 mm (tolerance ±0.05 mm), radial wall thickness 5 mm, clamp hole diameter 4 mm, chamfer at both ends r=0.5 mm.

Material and Process: 1070 spring steel stamping → quenching and tempering (HRC 48-52) → surface oxidation and blackening (film thickness 5-8 μm) → finishing and deburring. Rectangular cross-section design, stable elastic recovery force, suitable for standard groove installation, and can withstand high-frequency vibration conditions.

Compatible Model: Cat 950GC This device is used for axial positioning of bearings, gears, bushings, and other parts in loaders, 140M graders, 320D excavators, and C15 engine water pump shafts, preventing movement of transmission components.

Assembly Fit: Fits 90 mm diameter bearing housing bores (tolerance H7), groove diameter 87 mm (tolerance ±0.10 mm), groove width 3.2 mm (tolerance +0.10/-0.05 mm). During installation, use internal retaining ring pliers to compress the retaining ring before inserting it into the groove, ensuring the retaining ring is fully embedded without axial clearance.

Installation and Maintenance Points: Before installation, clean the groove inside the hole, check the retaining ring for deformation, cracks, and burrs. The groove surface roughness Ra ≤ 1.6 μm, the groove width and diameter meet tolerance requirements, and there should be no impact damage.

Use specialized internal retaining ring pliers to pry open the retaining ring, compressing it to a size smaller than the bore diameter, and then insert it into the groove. Release the pliers to allow the retaining ring to spring back and embed itself into the groove, ensuring that the retaining ring fits snugly against the bottom of the groove without any axial looseness. Do not strike the retaining ring with hard objects.

Maintenance Recommendation: Check the retaining ring’s elasticity and groove fit every 1000 hours. If the retaining ring is deformed, broken, or the groove is worn, causing a clearance exceeding 0.1 mm, replace it immediately. During replacement, simultaneously check the axial clearance of adjacent bearings/gears.