CAT 333-4942 BEARING-SLV-GD

CAT 333-4942 YM is a Caterpillar high-strength track traction bolt, primarily used for track link connections in small and medium-sized excavators and loaders. It is suitable for heavy-duty and vibration-prone conditions. Below is precise technical and application information:

Core Technical Parameters
Item Details
Part Model: CAT 333-4942 (3334942) YM Track Traction Bolt, Matching Nut: 333-4943, Strength Grade: Cat/ISO 898-1 Class 11.9Cat® …
Core Material: 42CrMo alloy quenched and tempered steel, integrally quenched and tempered, tensile strength: 1040 MPa, yield strength: 940 MPa, thread precision: 6g, surface galvanized passivation for corrosion protection

Key Dimensions: Thread specification: 1-1/8″-12 UNF, screw diameter: 28.575 mm, screw length: 104.78 mm, head hexagonal cross-sectional area: 41 mm, single weight: approx. 0.78 kg (1.72 lb)
Rated Load: Minimum breaking load 185 kN, recommended tightening torque 480–520 N·m, suitable preload 120–130 kN
Compatible Models: CAT 305.5E2/306E2 excavators (track links), 906M loaders (chassis tracks), 226D3 skid steer loaders (track connection)
Suitable Working Conditions: Heavy-duty continuous operation, high-frequency vibration, suitable for harsh working conditions such as earthmoving and rock excavation
Core Functions and Structural Features:
High-strength Connection: 11.9 grade high-strength design, adaptable to the dynamic load and impact of track links, preventing bolt loosening or breakage during operation, ensuring stable chassis transmission.

Anti-loosening Fit: Matching anti-loosening nuts 333-4943, when used with torque control installation, maintains reliable preload even under high-frequency vibration, reducing maintenance frequency.

Corrosion-resistant and durable: Galvanized passivated surface treatment enhances corrosion resistance in humid and dusty conditions, extending bolt life.

Installation and Maintenance Points
Installation Specifications
Clean threads and contact surfaces, removing oil and rust. Apply anti-seize agent (e.g., CAT 5P-3931) to prevent thread jamming.
Tighten with a torque wrench to 480–520 N·m, gradually increasing the load in 2–3 stages to ensure even preload.
After installation, check the fit between the bolt head and nut, ensuring no gaps or misalignment to prevent uneven stress.

Maintenance Recommendations
Check torque every 1000 working hours, retightening immediately if loosening occurs; check thread and surface condition every 2000 hours.

If thread damage, severe surface corrosion, or preload reduction exceeding 15% is found, replace the bolt and matching nut immediately to avoid safety hazards.