Komatsu PC300LC-7 Boom to Arm Linkage Pins and Bushings

Komatsu PC300LC-7 Boom to Arm Linkage Pins and Bushings is a machine-level reference hub for buyers who need stronger guidance before ordering Komatsu aftermarket pins and bushings. This page uses the cleaned PC300 work-equipment data, image references, and callout order to build a more authoritative path into the correct wear components for the Boom to Arm Linkage area.

For PC300LC-7, this section surfaces 44 distinct part numbers across 6 relevant images, with serial coverage such as 40001-UP, 50001-UP (ECOT3), A88001-UP, A85001-UP. Common component types in this section include Bracket (Welded), Bushing, Seat (Welded), Washer, Bolt, Boom.

Why this boom to arm linkage hub matters

Pins, bushings, seals, spacers, bolts, and related wear hardware are often easy to confuse across nearby pivot points. The same machine family can use visually similar parts in different locations, and the same part number can appear under different diagram contexts as serial ranges and work-equipment packages change. That is why this page is organized around the actual diagram images and callout order instead of broad category assumptions.

How to use this page

• Match your machine as PC300LC-7 first
• Confirm the work-equipment area as Boom to Arm Linkage
• Use the image below to identify the correct diagram
• Match the numbered callout to the listed part number
• Verify by serial range and machine details before purchase

Diagram pc300l7c_360050a.png

The numbered callouts below follow the source sort order for this image, helping connect the diagram to the matching part-number rows.

1. 1 — 206-62-71321 (Plate (Welded))
2. 2 — 206-62-71330 (Plate (Welded))
3. 3 — This part cannot be supplied as an individual part. It is supplied as an assembly. (Boom)
4. 4 — 207-62-54750 (Bracket (Welded))
5. 4 — 207-70-77152 (Boom)
6. 5 — 207-62-74221 (Bracket (Welded))
7. 6 — 207-62-74230 (Bracket (Welded))
8. 7 — 207-62-74240 (Bracket (Welded))
9. 8 — 207-62-74251 (Bracket (Welded))
10. 9 — 207-62-74281 (Bracket (Welded))
11. 10 — 207-62-74340 (Bracket (Welded))
12. 11 — 207-62-74370 (Bracket (Welded))

Diagram pc300l7c_360010a.png

The numbered callouts below follow the source sort order for this image, helping connect the diagram to the matching part-number rows.

1. 1 — This part cannot be supplied as an individual part. It is supplied as an assembly. (Boom)
2. 2 — 207-62-54750 (Bracket (Welded))
3. 3 — 207-62-74221 (Bracket (Welded))
4. 3 — 207-70-00283 (Boom Ass'Y)
5. 3 — 207-70-00552 (Boom Ass'Y)
6. 4 — 207-62-74230 (Bracket (Welded))
7. 4 — 207-70-00582 (Boom Ass'Y)
8. 5 — 207-62-74240 (Bracket (Welded))
9. 5 — 207-70-00253 (Boom Ass'Y)
10. 6 — 207-62-74251 (Bracket (Welded))
11. 7 — 207-62-74281 (Bracket (Welded))
12. 8 — 207-62-74340 (Bracket (Welded))

Diagram pc300l5r_360010a.png

The numbered callouts below follow the source sort order for this image, helping connect the diagram to the matching part-number rows.

1. 1 — 207-70-00251 (Boom Ass'Y)
2. 1 — This part cannot be supplied as an individual part. It is supplied as an assembly. (Boom)
3. 2 — 205-62-73430 (Seat)
4. 3 — 207-62-54750 (Bracket (Welded))
5. 4 — 207-62-74221 (Bracket (Welded))
6. 5 — 207-62-74230 (Bracket (Welded))
7. 6 — 207-62-74240 (Bracket (Welded))
8. 7 — 207-62-74251 (Bracket (Welded))
9. 8 — 207-62-74281 (Bracket (Welded))
10. 9 — 207-62-74310 (Seat (Welded))
11. 10 — 207-62-74340 (Bracket (Welded))
12. 11 — 207-62-74370 (Bracket (Welded))

Related PC300LC-7 hubs

• Komatsu PC300 Pins and Bushings
• Komatsu PC300LC-7 Pins and Bushings

Use this hub to narrow the correct Komatsu boom to arm linkage pins and bushings before moving into product-level verification. It is built to support more accurate research, stronger SEO authority, and better buying confidence for serious heavy equipment parts work.