Center Brake Disc Plate for John Deere 570 Graders, 644 Loaders & 646 Compactors

Fits Models At A Glance:

• John Deere Motor Graders: 570, 570A
• John Deere Wheel Loaders: 644, 644B (After Serial Number 339877)
• John Deere Compactors: 646 (Before Serial Number 223644), 646B (Before Serial Number 223644), 646C

Key Notes:

• Part Numbers: R78430, R45781, R48476, R45780, R33819, 38B345
• Weight: 10.30 lbs (4.67 kg)
• Diameter: 15"
• Teeth: 15
• Application: Center brake disc plate — the friction disc in the center brake assembly that engages to slow and stop the machine when the brake is applied
• Use With: Sunshaft A-R45779 or R33431
• Condition: Aftermarket replacement part

Common Use Case or Symptoms: Use when the machine has reduced braking effectiveness, the brakes are slipping under load, or the brake disc is worn beyond service limits — all common signs of a worn center brake disc plate on John Deere 570 graders, 644 wheel loaders, and 646 compactors.

Why Choose Broken Tractor:

• ✅ Broad Interchange Coverage: Replaces R45781, R48476, R45780, and R33819 — covers the full range of John Deere center brake disc applications across 570 graders, 644 loaders, and 646 compactors
• ✅ Correct Sunshaft Pairing: Engineered for use with sunshaft A-R45779 or R33431 — always confirm sunshaft compatibility when replacing the brake disc for proper brake system function
• ✅ Fast Shipping from a U.S.-Based Team: In-stock and ready to ship same day from our U.S. warehouses

• Application: Brake center plate; engages with sunshaft to provide braking force at the final drive on John Deere industrial, skid steer, and tractor applications
• Note: Verify serial number breaks before ordering — 644B fitment begins at SN 339877>; 646 and 646B fitment ends at SN <223644; 4230 fitment ends at SN <015452
• Aftermarket: This is an aftermarket replacement part

Why Choose Broken Tractor?

• ✅ Direct Replacement for Four OEM Part Numbers – Replaces R45781, R48476, R45780, and R33819 in one part
• ✅ Precision-Cut 15-Tooth, 15" Diameter Plate – Engineered to restore proper brake engagement at the final drive
• ✅ Ships Fast from Our U.S.-Based Team – Heavy-duty part, ready to ship without the dealer delay