Part of the Yanmar Parts Manuals.
A 4TN84L-RBB on the stand with the crank out is just a pile of castings until you can put a number on every piece of it, and the Crankshaft & Piston pages in this Yanmar parts catalog do exactly that, down to the 0.25 oversize pistons with rings and the 0.25 undersize main and thrust bearings a reground block calls for.
This is Yanmar publication Y00B4401, the factory parts catalog for the 4TN84L-RBB diesel engine, covering engines up to serial E/#08683. Its 37 pages of exploded diagrams take in the cylinder block, cylinder head, camshaft and driving gear, lubrication and cooling water systems, fuel injection pump and pipes, governor, generator, and both the previous and new starting motors.
Nothing stalls a rebuild like a gasket you cannot name. Every seal, O-ring, and fastener here carries its Yanmar part number, so the order you place is the order that fits.
What's Inside This Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| Engine | 1-2 | Cylinder Block Assy, Round Gasket, Main Bearing, Thrust Bearing, Camshaft Bush, Cylinder Head Gasket, Gasket |
| Suc./ Exh. Manifold & Air Cleaner | 11-12 | Camshaft Assy, Camshaft Gear, Thrust Bearing, Tappet, Push Rod, Idle Gear Shaft, Gear w/ Bush, Idle Gear Bush |
| Cooling Water System | 19-21 | Pump w/ Governor & Feed Pump, Camshaft, Thrust Ball Bearing, Cam Shaft Support, Plunger w/ Barrel, Retainer A, Plunger Spring Shoe, Plunger Spring |
| Starting Motor (Previous) | 30-31 | Starter, Armature Assy, Bearing, Field Coil Assy, Brush, Brush Holder Assy, Brush Spring, Rear Cover |
| Starting Motor (New) | 32-33 | Generator, Collar, Plate Assy, Stator, Coupler, Flywheel Assy, V-belt Adjuster |
| Gasket Set (Optional) & Tool | 36-37 | Gasket, CYL.HEAD, Liquid, O-Ring, Seal, Valve Stem |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Main Bearing Undersize | 0.25 | p. 2 |
| Thrust Bearing Undersize | 0.25 | p. 2 |
| O-Ring 1A P-16.0 | P-16.0 | p. 4 |
| Nut M8xP1.0 | M8xP1.0 | p. 8 |
| O-Ring 1A S-50.0 | S-50.0 | p. 8 |
| Clamp Size | 60 | p. 10 |
| Key Size | 7x14 | p. 12 |
| Piston W/Ring Oversize | 0.25 | p. 14 |
| V-Pulley Diameter | 120 | p. 18 |
