Yanmar B50, 4TN84L-RBD Parts Catalog

Open the Drivetrain Parts Diagram and locate the final drive assembly in the exploded view. Record each item number for the travel motor, sprocket, and hub. Cross-reference those numbers in the Parts Number List. This platform spans multiple model codes; confirm your variant against the Specifications on page 2 before placing an order.

Turn to the Hydraulic Parts Diagram and find the cylinder assembly in the exploded view. Each seal ring and wiper is assigned its own item number. Pull those numbers and look them up in the Parts Number List. Boom and arm cylinders use separate seal kits; confirm the cylinder location in the diagram before ordering to avoid receiving the wrong assembly.

Check the Engine Parts Diagram. The exploded view breaks the head gasket, oil pan seal, and individual o-rings into separate numbered groups. Record each item number for the seals required, then look them up in the Parts Number List. Confirm the engine model code on page 1 first, as gasket sets differ between model variants covered in this catalog.

Open the Chassis Parts Diagram. The undercarriage exploded view lists tracks, carrier rollers, bottom rollers, idlers, and sprockets as separate numbered items. Cross-reference each item number with the Parts Number List. Check track pitch and shoe width in the Specifications on page 2 before ordering; aftermarket track dimensions vary by manufacturer and a mismatch will cause sprocket wear.

Find the Boom & Attachment Parts Diagram. The exploded view assigns separate item numbers to pins and bushings at each pivot point on the boom, arm, and bucket. For the B50-C[R] with a maximum digging depth of 3600 mm, confirm the correct arm configuration first, then pull part numbers from the Parts Number List to match the right pin diameter.

Check the Table of Painted Color on page 3 for Yanmar color codes: Cream White, Saffron Yellow, and Charcoal Gray. Open the Vehicle Painted Color diagram on page 4 to confirm which panels carry which color. Cross-reference paint item numbers with the Parts Number List to order the correct formulation and quantity for the damaged panel area.