Part of the Yanmar Parts Manuals.
All 44 pages of this Yanmar TL120 / 4TNV84T-XTBL parts catalog PDF organize the complete turbocharged engine into exploded-view assemblies, from cylinder block through gasket set, each carrying factory part numbers and cross-references for every listed component. Inside: fuel injection pump, governor, crankshaft and piston, lubrication oil circuit, cooling water system, starting motor, generator, and the RHF4 turbine assembly. Part callouts are indexed against original Yanmar component numbers, so you can identify the exact piece before you pick up the phone. The piston pin specs at D26 x L70 mm; the oil sump uses an M22 drain plug. Chasing a part number off a worn tag costs time you don't have. Bookmarked by assembly, keyword-searchable end to end; open it on your tablet, find the part, and place the order.
What's Inside This Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| Cylinder Block | 5-6 | Cylinder Block Assy, Camshaft Bush, Main Bearing Set, Thrust Bearing Assy, Head Gasket, Spacer, Thrust .250S Bearing |
| Gear Housing | 7-8 | Gear Case Assy, Oil Seal, Pump Cover Assy, Lub. Oil Pump Cover, Relief Valve, Spring, Gear Case Flange, Filler Cover |
| Flywheel Housing & Oil Sump | 9-10 | Flywheel Housing, Flywheel Cover Cap, Oil Sump Spacer, Lub. Oil Sump Assy, Oil Seal Case Assy, Oil Seal, Gasket.liquid |
| Cylinder Head & Bonnet | 11-12 | Engine Lifter, Valve Bridge Seat a, Cylinder Head Assy, Valve Guide, Valve Bridge Guide, Exhaust Valve, Valve Spring, Spring Retainer |
| Suction Manifold & Air Cleaner | 13-14 | Intake Hose, Intake Manifold, Manifold Gasket, Air Heater, Gasket, Air Cleaner, Inner Element Assy, Element |
| Exhaust Manifold & Silencer | 15-16 | Exhaust Manifold Gasket, Exhaust Manifold, Muffler, Silencer Support, Turbocharger Gasket |
| Camshaft & Driving Gear | 17-18 | Tappet, Push Rod, Camshaft Assy, Thrust Metal, Camshaft Gear, Idle Gear Shaft, Idle Gear Assy, Idle Gear Bush |
| Turbine | 19-20 | Gasket, RHF4 Turbine, Bolt, Nut |
| Crankshaft & Piston | 21-22 | Crankshaft Assy, Crankshaft Gear, Crankshaft V-Pulley, Flywheel Assy, Ring Gear, Piston Assy, Ring Set, Connecting Rod Assy |
| Lub.Oil System | 23-24 | Lub. Oil Dipstick, Dipstick Guide, Gasket, Lub. Oil Pipe Assy, Oil Cooler Assy, Bracket Assy, Joint, Cooler in Pipe Assy |
| Lub.Oil Line | 25-26 | Joint Bolt Assy, Round Gasket, Fuel Return Pipe, Hose, Elbow, Lub. Oil Pipe Assy, Retainer |
| Cooling Water System | 27-28 | Cooling Water Pump Assy, Gasket, Plate, Joint, Thermo. Case Gasket, V-Pulley, V-Belt A36, Cooling Fan |
| Fuel Injection Pump | 29-30 | Fuel Injection Pump Assy, Joint, Stopper, Delivery Valve Assy, Spring, Delivery Holder, Cooling Water Joint, Lifter |
| Governor | 31-32 | Case Cover, Case Packing, Spring, Regulator Lever, Shaft Retainer, Stop Solenoid |
| Fuel Injection Valve | 33-34 | Fuel Injector, Nozzle Assy, Nozzle Holder Assy, Nozzle Spring, Nozzle Spring Seat, Stop Plate, Retainer, Injection Pipe Assy |
| Fuel Line | 35-36 | Fuel Filter Bracket, Foﾌｲﾙﾀ, Fuel Pipe Assy, Tube, Fuel Oil Pipe, Fuel Pump, Separator Assy, Retaining Ring |
| Starting Motor | 37-38 | Starter, Pinion Shaft, Armature Assy, Field Coil Assy, Brush, Rear Cover, Brush Holder Assy, Brush Spring |
| Generator | 39-40 | Belt Adjuster, Alternator, Rotor Assy, Bearing Cover, Drive Frame Assy, Plate, Rear Frame Assy, Pulley |
| Gasket Set | 41 | Head Gasket, Valve Stem Seal, Nozzle Protector, Nozzle Seat, Bonnet Pk, Exhaust Manifold Gasket, Turbocharger Gasket |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Main Bearing Undersize | 0.25 | p. 5 |
| Drain Plug Size | M22 | p. 9 |
| Piston Pin Diameter and Length | D26, L70 mm | p. 21 |
| Piston Ring Oversize | 0.25 | p. 21 |
