Part number lookup
4TN78L Replacement Parts
Cross-reference and compare 2 replacement listings for OEM / aftermarket part number 4TN78L. Use this part-number page — not a generic equipment or brand hub — to review price, availability, and fitment before ordering.
2 Matching Products
Part Numbers and Cross References
Applications and Fitment Summary
- Yanmar · Yanmar Engine YB451 YB501 Excavator Item Included: - 1set Full gasekt kit - 4pcs Liner Cylinder/Sleeve - 4pcs Piston, STD size - 4pcs Piston Pin - 4set Ring set for 4pistons, STD size - 8pcs Pin Clips - 8pcs Valves (4pcs Intake Valves + 4pcs Exhaust Valves) - 8pcs Valve Guides - 8pcs Valves Seats (4pcs Intake Valves Seats+ 4pcs Exhaust Valves Seats) - 1set Crankshaft bearing STD size - 1set Connect Rod Bearing STD size - 1Set Crankshaft Thrust washer
- Yanmar · Yanmar 4TN78L 4TN78TL-RB Engine YB451 YB501 Excavator
Frequently Asked Questions
What parts replace OEM number 4TN78L?
This page lists 2 replacement listings indexed under 4TN78L. Compare cross references, applications, and pricing before ordering.
How do I confirm fitment for 4TN78L?
Match the stamped part number first, then verify machine model, engine code, serial number, mounting points, and photos of your old part before checkout.
Can I request a quote if 4TN78L is not an exact match?
Yes. Use the fitment inquiry form with your machine plate, engine model, and photos. Support can review alternatives or cross references.