XCMG E335C、XE370CA、XE470C excavator partd dust ring 329900858

Full Part Number: 329900858 Dust Seal Metal Outer Frame Dustproof Oil Seal

Matching Parts: 329900861 (your previous query item), 860137175, 860139849, four commonly used sets for large-tonnage hydraulic cylinder repair kits (Alibaba.co...)

Structure: Cold-rolled steel outer frame + polyurethane/nitrile composite lip, single-lip external dustproof structure

Application: The outermost dustproof position of the hydraulic cylinder piston rod guide sleeve, isolating sand, mud, and dust, protecting the main oil seal and piston rod plating

II. Compatible Models
Compatible with XCMG medium and large hydraulic excavator boom/stick/bucket cylinders:

XE335C, XE370CA, XE470C, XE490DK, XE500D series main cylinder standard dustproof parts

329900858, 329900861 Two sets of dust seals are provided for the same model of hydraulic cylinder; one repair kit contains two dust seals for use together.

III. Materials and Operating Conditions

Lip: Original factory polyurethane (PU) (wear-resistant and sand-resistant), aftermarket NBR nitrile (cost-effective option) is available.

Frame: Galvanized rust-proof steel ring, not easy to fall off or deform after press-fitting.

Applicable Scenarios: Mining, earthmoving, crushed stone, high dust and harsh construction sites.