5H-6733 O-ring seal for CAT excavators spare part

5H-6733 O-ring seal for CAT excavators spare part Featured Image
  • 5H-6733 O-ring seal for CAT excavators spare part
  • 5H-6733 O-ring seal for CAT excavators spare part

Short Description:

Large-size NBR O-ring for Caterpillar excavator and material handler hydraulic tank cover, inner diameter 139.07 mm, seals tank joint surface evenly, retains hydraulic oil and prevents dust and moisture ingress to keep oil clean.

Product Detail

Product Tags

description

This O-ring is integrally molded from 75A NBR rubber with tight dimensional tolerance. It is designed for static sealing on hydraulic tank flange, resistant to mineral hydraulic oil, diesel and lube oil, and maintains good elasticity under wide temperature fluctuation. Permanent compression set, scratch, extrusion tear and aging hardening will lead to slow tank oil leakage and water contamination, causing oil emulsification, clogged filter and premature wear of hydraulic pump and valve.

Part No.:5H-6733
Type: O-ring seal
Material: NBR nitrile rubber, Shore A75
Inner Diameter:139.07 mm
Cross-section Diameter:6.985 mm
SAE Size: AS568 -433
Color: Black
Compatible Fluid: Anti-wear hydraulic oil, diesel, lubricating oil
Not for: Glycol coolant, biodiesel
Working Condition: Static sealing of hydraulic tank, temperature cycle and dusty site
Matching System: Hydraulic tank flange sealing assembly

Application Scenarios

Fits Caterpillar MH3040, M325D L material handlers and medium excavators, for overhaul of sealing position on hydraulic tank top cover flange.

FAQ 

Q：Can O-ring with shallow indentation be reused without crack?
A：Indentation means permanent compression set, leakage may occur under temperature cycle, reuse is not recommended.

Q：Can this NBR ring be used for cooling water tank?
A：Not suitable. NBR swells easily under long-term glycol immersion.

Q：Why does tank still leak after installing new O-ring?
A：Check flange distortion, corrosion and uneven bolt tension first.

Q：Can generic O-ring with same dimension replace this original one?
A：Not recommended. Generic rubber has poor rebound and oil resistance for large tank flange.

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