CAT 347-0469 BEARING-SLV-GD

CAT 347-0469 YM is Caterpillar’s High-Strength Wear Pin. YM is a high-quality component (compliant with CAT original factory dimensions and performance standards), primarily used in the articulated parts of excavators, loaders, and other construction machinery (boom, stick, bucket, connecting rod, rocker arm, etc.). It withstands heavy loads, impacts, and high-frequency oscillations, ensuring the stability, wear resistance, and shear resistance of the articulated structure.

I. Core Technical Parameters

Item Details
Part Model: CAT 347-0469 (3470469), YM Quality Pin

Material: 42CrMo / 40CrNiMoA alloy steel, overall tempering + surface medium-frequency quenching

Hardness: Core HRC 28–32, surface hardened layer HRC 52–58, hardening depth 3–5 mm

Surface Treatment: Precision grinding + phosphating / zinc plating passivation, rust-proof and wear-resistant

Key Dimensions: Nominal diameter 50 mm, effective length 160 mm, total length 180 mm (including head / locking groove), locking groove diameter 47 mm, groove width 6 mm

Tolerances: Diameter tolerance h6 (-0.016 / 0), cylindricity ≤ 0.02 mm, surface roughness Ra ≤ 0.4 μm

Single Weight: Approx. 2.7 kg

Matching: Inner diameter 50H7 sleeve / Bushing, clearance 0.02–0.05 mm

Load-bearing capacity: Shear strength ≥ 900 MPa, radial load ≥ 120 kN, impact resistance ≥ 120 J/cm²

Operating temperature: -40℃ ～ 120℃

Applicable working conditions: Heavy-duty articulation, high-frequency oscillation, impact load, dusty and muddy conditions

II. Main functions and structural features

High-strength shear resistance: Alloy steel tempered + surface hardened, good core toughness and high surface hardness, capable of withstanding large shear forces and resisting impact without cracking, suitable for critical articulations such as buckets and booms.

High wear resistance and low wear: Precision ground surface + high-hardness layer, low coefficient of friction with sleeves/bushings, less prone to scratching and burring during long-term oscillation, significantly extending the life of pins and bushings.

Precise positioning, anti-wear: Strict control over diameter tolerance h6 and cylindricity ensures coaxiality with the sleeve and hinge hole, reducing runout and one-sided wear, and preventing loose hinges and abnormal noise.

Reliable locking structure: Standard locking groove design, used with snap rings/retaining rings/locking plates, prevents pin movement and disengagement during operation, ensuring overall machine safety.

YM quality assurance: Dimensions, materials, heat treatment, and surface finish all meet CAT original standards, allowing direct replacement of original parts without modification, offering high cost-effectiveness.

III. Typical Compatible Parts and Models
Common Installation Locations
Boom – Frame Hinge Pin
Boom – Stick Hinge Pin
Stick – Bucket Hinge Pin
Connecting Rod, Rocker Arm, Cylinder Lug Pins
Typical Compatible Models (Reference)
CAT 320D / 320GC / 323GC / 326GC Excavators
CAT 330D / 330GC / 336GC Excavators
CAT 950GC / 962GC / 966M Loaders
Articulation systems for bulldozers and graders of the same tonnage
The actual assembly location is subject to the part number 347-0469 in the Parts Manual.