140-09-12820 1400912820 Dust Seal Scraper for Bulldozer Hydraulic Cylinder Rod Dust Prevention

Q: What type of heavy equipment does part number 140-09-12820 match for assembly?
A: The part number 140-09-12820 is a dust seal wiper made for bulldozer hydraulic cylinder rod assembly.

Q: What sealing category does part 140-09-12820 fall into?
A: Part 140-09-12820 belongs to dust seal group, which is an external wiper seal for reciprocating piston rod.

Q: What materials compose this dust seal wiper?
A: It is constructed from NBR rubber combined with stamped metal core to resist deformation under heavy impact.

Q: What core function does this dust seal perform during cylinder operation?
A: It wipes sand, dirt and muddy residue off the piston rod surface as the rod retracts inward into the cylinder.

Q: Which position on hydraulic cylinder holds this dust seal?
A: It is pressed into the outermost slot of rod gland, facing directly to the dusty construction working area.

Q: What special performance features does this dust seal have?
A: It has outstanding abrasion resistance and maintains stable lip flexibility under frequent reciprocating motion.

Q: Can this dust seal control hydraulic oil leakage from cylinder?
A: It cannot retain hydraulic oil. Its duty is to stop external contaminants, and inner rod seals handle oil sealing.

Q: What damage will be caused once this dust seal wears out?
A: Hard particles will enter the cylinder assembly, mark scratches on piston rod and wear internal sealing components.
Q: What preparation work should be done before installing this dust seal?