Komatsu D475A-5 Bulldozer U Blades

Quick Reference Specs – Komatsu D475A-5 U Blades

Part No.	Qty	Parts Name
198-71-31550	3	EDGE, CUTTING
198-71-31540	2	BIT, END L.H.
198-71-31520	1	BIT, END R.H.
198-71-31530	1	BOLT
198-71-21870	8	BOLT
198-71-21860	8	BOLT
198-71-21850	34	BOLT
198-71-21880	8	WASHER
198-71-21890	42	WASHER
198-71-21911	50	NUT

Complete Blade Assembly for Full Moldboard Protection
The Komatsu D475A-5 U Blades assembly provides comprehensive wear protection for the entire dozer moldboard. This complete set includes three center cutting edges (198-71-31550), two left-hand end bits (198-71-31540), and one right-hand end bit (198-71-31520). Together, these components deliver full-width coverage for heavy dozing operations. Consequently, the assembly ensures consistent material engagement across the blade. Each part is manufactured from high-strength heat-treated alloy steel. Therefore, the components resist abrasion and impact from rocky terrain, mining overburden, and compacted soil. This complete kit is specifically designed for the Komatsu D475A-5 bulldozer.

	Part No.	Qty	Parts Name
20.	198-71-31550	3	EDGE,CUTTING
21	198-71-31540	2	BIT,END L.H.
22	198-71-31520	1	BIT,END R.H.
23	198-71-31530	1	BOLT
24	198-71-21870	8	BOLT
25	198-71-21860	8	BOLT
26	198-71-21850	34	BOLT
27	198-71-21880	8	WASHER
28	198-71-21890	42	WASHER
29	198-71-21911	50	NUT

Simple Installation with Complete Mounting Hardware
Installing the Komatsu D475A-5 U Blades assembly is straightforward. Follow these steps:

Clean all moldboard mounting surfaces thoroughly before starting.
Position the three center cutting edges (198-71-31550) along the moldboard center.
Attach the two left end bits (198-71-31540) and one right end bit (198-71-31520) at the corners.
Insert the appropriate bolts (198-71-31530 x1, 198-71-21870 x8, 198-71-21860 x8, 198-71-21850 x34, 198-71-21911 x50).
Secure with washers (198-71-21880 x8) and nuts (198-71-21911 x50).
Torque all fasteners evenly in a crossing pattern to manufacturer specifications.

For best results, check bolt tightness after the first few hours of operation. Replace any component when approximately 40% of thickness remains.

Frequently Asked Questions About Komatsu D475A-5 U Blades
What does this assembly include? 3 center cutting edges, 2 LH end bits, 1 RH end bit, plus bolts, washers, and nuts.
What are the part numbers and quantities? Cutting edges: 198-71-31550 (x3); LH end bits: 198-71-31540 (x2); RH end bit: 198-71-31520 (x1); bolts: 198-71-31530 (x1), 198-71-21870 (x8), 198-71-21860 (x8), 198-71-21850 (x34), 198-71-21911 (x50); washers: 198-71-21880 (x8); nuts: 198-71-21911 (x50).
Which Komatsu model is this compatible with? Designed for the Komatsu D475A-5 bulldozer.
What material is used? High-strength heat-treated alloy steel.
Can individual components be replaced separately? Yes. Each part can be ordered and replaced individually.
Is weld cladding applicable? Yes, weld buildup works well for extra wear protection.