Blade Main Center Pin for Case 450–550E Dozers – D34789

Fits Models At A Glance:

• Case Crawler Dozers: 450, 450B, 450C, 450D, 450E, 550, 550E

Key Notes:

• Part Number: D34789
• Weight: 16 lbs (7.26 kg)
• Material: Precision-machined, induction-hardened steel
• Manufacturer: Paint Valley Equipment — Made in USA
• Application: Blade main center pin — serves as the central pivot point for blade mounting, allowing left-to-right blade angle adjustment on Case 450 through 550E series crawler dozers
• Location: Center blade mounting assembly — the primary pivot pin connecting the dozer blade to the push frame

Common Use Case or Symptoms: Use when the blade main center pin is worn, grooved, bent, or has excessive play — a worn center pin causes imprecise blade angle control, excessive blade movement during dozing, and accelerated wear to the blade mounting bushings and push frame on Case 450 through 550E crawler dozers.

Why Choose Broken Tractor:

• ✅ Made in USA by Paint Valley Equipment: Precision-machined from induction-hardened steel — engineered to withstand the extreme torsional and shear loads of dozer blade pivot applications on Case 450 through 550E crawler dozers
• ✅ Full 450–550E Series Coverage: One pin covers seven Case crawler dozer models from the original 450 through the 550E — ideal for dealers and fleet operators servicing multiple generations of Case crawler dozers
• ✅ Fast Shipping from a U.S.-Based Team: In-stock and ready to ship from our U.S. warehouses