Cat D8N, D8R, D8T, D9N, D9R, 844 Dozer Blade Cutting Edge 6Y5540 – 5 Hole 1" Bolt

Fits Models At A Glance:

• Caterpillar Track-Type Tractors: D8N, D8R, D8R II, D8T, D9N, D9R
• Caterpillar Wheel Dozers: 844, 844H, 844K

Key Notes:

• Part Number(s): 6Y5540 (6Y-5540)
• Application: Bolt-on bulldozer blade cutting edge
• Dimensions: 5 bolt holes, 1" plow bolts
• Quantity: 2 required per blade — sold each
• Hardware: Bolt 4J9208, nut 2J3507, washer 5P8250 (sold separately)
• Serial Number Notes: Sister edges on the D8/D9: 7T9125 (end edge), 1122471/1122472 (D8R–D10R), 4Z9058 (13 hole), 1359373 (8 hole). Count holes before ordering.
• Shipping Restrictions: Ships LTL Truck Freight — freight quote at checkout
• Condition: Aftermarket replacement part

Common Use Case or Symptoms:

Use when the blade edge is worn back toward the bolt holes, cracked, or no longer holds a clean grade on a Cat D8N or 844K.

Why Choose Broken Tractor:

• ✅ Hardware numbers called out — Bolts and nuts listed so the edge and fasteners arrive together.
• ✅ 9 models on one edge — Cat used this edge across the D8N family listed above.
• ✅ Freight handled by people who ship steel daily — Cutting edges leave our Louisiana and Ohio warehouses on a pallet, banded and protected.