Why Choose This Pin Swing 301.7 GS-SP-521-4188
– Hardened to OEM specification
– Ground to h6 diameter tolerance — correct clearance with OEM bushes, no shimming required
– Retaining groove and lock hole configuration matched to OEM

Heavy-Duty Construction
This pin swing 301.7 gs-sp-521-4188 is manufactured using chrome-moly alloy steel through-hardened then case-hardened for combined toughness and wear resistance. Hard chrome bearing surface: corrosion-resistant and low-friction under continuous grease lubrication. Precision ground finish for consistent fit across all joint positions. Designed to withstand vibration, impact loads, and harsh operating environments commonly found in construction, quarry, mining, and earthmoving applications. Precision manufacturing helps ensure correct fitment and long service life.

Applications
Suitable for a wide range of heavy equipment and undercarriage systems including:
– Excavators
– Dozers
– Loaders
– Track roller assemblies
– Earthmoving machinery undercarriage components

Maintenance Recommendations
– Pack joint with fresh EP grease before and immediately after installation
– Inspect bush bore diameter — replace bushes if bore is beyond OEM tolerance
– Torque retaining hardware to OEM specification; re-check after first 8 hours of operation

Australia-Wide Supply
We supply high-quality pin swing 301.7 gs-sp-521-4188 replacement parts across Australia with shipping from NSW. Suitable for aftermarket heavy equipment repairs and undercarriage maintenance applications.

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