Yanmar B22, 3TN75L-RB, Crawler Backhoe Parts Catalog (incl. Wiring)

Open the Crawler (270) section and go to the exploded view on page 40. The track assembly breaks into discrete line items: Link Assy, Bush, Pin, and Shoe 270. Confirm the shoe width is 270mm before ordering - the rubber and steel shoe variants are separate SKUs in the parts list. Cross-reference the parts index using your serial number prefix to confirm correct link pitch for your build date.

Go to the Hydraulic Parts Diagram on page 107. Each cylinder lists its Seal Set as a single kit line item - do not attempt to source individual seals unless the exploded view explicitly breaks them out separately. The Arm Cylinder, Boom Cylinder, and Bucket Cylinder each carry a distinct Seal Set part number. Identify your specific cylinder by callout position in the diagram, then verify against the serial number range in the index header before ordering.

Reference the Track Frame & Idler exploded view on page 40. The idler shaft seal is listed as Seal 357220 in the parts index - use that designation when ordering. The Idler 280 Assy is a 280mm diameter unit; confirm your idler matches that dimension before sourcing the ball bearing and piston listed alongside it. If the idler has significant hours, order the ball bearing at the same time as the seal to avoid a second disassembly.

Locate the Drivetrain Parts Diagram on page 68. The Turning Motor parts list sequences components as: Motor Assy, Drive Seal, Floating Bearing, Angular Bearing, and Planetary Gear (B). Identify which bearing is worn - floating and angular types are not interchangeable and carry separate part numbers. Also check the Turning Driving Gears section for the upper and lower seal line items if the swing bearing housing shows any weeping at the frame interface.

Find the Control Valve section in the Hydraulic Parts Diagram on page 107. The parts list itemizes: Valve Assy, Body Assy, Cover, Seat, Spring, and Plug individually. If multiple internal components are worn, price the complete Valve Assy against the sum of individual parts - ordering the assembly is often faster and avoids mismatched component generations. Confirm model variant (B22, B22-P(R), or B22-C(R)) via the serial number prefix in the index before finalizing the order.

Open the Engine Parts Diagram on page 19. The Engine Mount & Radiator section lists Absorber, Stopper, Bracket, Mount, Radiator, and Hose as individual line items. Match each hose to its callout position in the exploded view - upper and lower radiator connections are separate part numbers. The vibration absorber and stopper are a paired set in the diagram; if the mount bracket shows cracking or shift, order both the absorber and stopper together to restore correct engine positioning.