Searching for the correct Yanmar TB145, 4TNE88-(E) TB (1), 4TNV88-QTB, QTB1, 4TNE88-TB, 4TNE88-ETB parts catalog PDF? This 86-page factory parts manual maps out every single component of your engine. You get detailed exploded views for the cylinder block, gear housing, and fuel injection pump, complete with exact part numbers and interchangeability notes. Open to the cooling system section to find full breakdowns of the water pump, fan, and thermostat assemblies. Confirm the thermostat opening temperature matches your specific variant, like 82 degrees Celsius for the QTB1 or 71 degrees for the TB (1), and verify the 0.5KG oil pressure switch setting before ordering replacements. Stop wasting time squinting at blurry diagrams. Grab this bookmarked download, open it on your tablet, and get the right parts ordered today.
What's Inside This Yanmar 4TNE88-ETB, 4TNV88-QTB Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| Manual Usage Guide | 1-2 | How to Read, Parts Change Notice, Catalog Form, Reference Numbers, Interchangeability, Effective Machine Numbers |
| Cylinder Block | 4-5 | Block Assembly, Plugs, Bolts, Main Metal, Thrust Metal |
| Gear Housing | 6-7 | Housing Assembly, Oil Seal, Studs, Covers, O-Rings, Bolts, Rotors |
| Flywheel Housing & Oil Sump | 8-9 | Parallel Pins, Housing, Flywheel Cover, Bolts, Oil Sump, Drain Plug, Seal Washer |
| Cylinder Head & Bonnet | 10-11 | Head Assembly, Valve Guides, Valves, Springs, Retainers, Seals, Rocker Arm, Bonnet Assembly |
| Suction Manifold & Air Cleaner | 12-13 | Manifold, Gaskets, Bolts, Intake Pipe, Air Cleaner, Elements, Clamps |
| Exhaust Manifold & Silencer | 14-15 | Manifold, Gaskets, Bolts, Studs, Silencer, Tail Pipe, Clamps |
| Camshaft & Driving Gear | 16-17 | Tappet, Push Rod, Camshaft Assembly, Thrust Metal, Camshaft Gear, Idle Gear, Bolts |
| Crankshaft & Piston | 18-19 | Crankshaft Assembly, Parallel Pin, Crankshaft Gear, V-Pulley, Piston, Ring Set, Connecting Rod |
| Lub. Oil System | 20-21 | Oil Pump, Gaskets, Bolts, Oil Inlet Pipe, Oil Strainer, Oil Filter, Oil Pressure Switch, Oil Cooler |
| Cooling Water System | 22-23 | Water Pump, Plugs, V-Belt, V-Pulley, Fan, Thermostat, Gaskets, Water Temperature Switch |
| Fuel Injection Pump | 24-25 | Pump Assembly, Feed Pump, Camshaft, Plunger, Delivery Valve, Control Rack, Solenoid |
| Fuel Injection Pump (Inner Parts) | 70 | Pump Assembly, Plunger, Delivery Valve, Control Rack, Springs, O-Rings |
| Governor | 26-27 | Weight, Control Shaft, Lever, Springs, Nuts, Bolts, Packing, Solenoid |
| Fuel Injection Valve | 28-29 | Valve Assembly, Nozzle, Holder, Springs, Shims, Injection Pipes |
| Fuel Line | 30-31 | Fuel Strainer, Taper Valve, Fuel Element, Fuel Pipes, Clamps |
| Starting Motor | 32-33 | Armature, Bearings, Field Coil, Brushes, Housing, Magnetic Switch, Pinion |
| Generator | 34-37 | Rotor, Bearings, Regulator, Brushes, Fan, Diode, Pulley, Bolts |
| Gasket Set | 38-39 | Cylinder Head Gasket, Oil Pump O-Ring, Valve Stem Seal, Nozzle Protector, Manifold Gaskets, O-Rings |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| 4TNV88-QTB, QTB1 | ||
| Thermostat opening temperature | 82℃ | p. 67 |
| Oil Pressure Switch Setting | 0.5KG | p. 65 |
| V-Belt Type | A37 | p. 67 |
| Cooling Fan Diameter | D380 | p. 67 |
| Radiator Cap Pressure | 0.9KG/CM2 | p. 67 |
| Generator Amperage | 40A | p. 81 |
| 4TNE88-(E) TB (1) | ||
| Thermostat opening temperature | 71℃ | p. 23 |
| Oil Pressure Switch Setting | 0.5KG | p. 21 |
| V-Belt Type | A-39 | p. 23 |
| Cooling Fan Diameter | D410 | p. 23 |
| All Models | ||
| Main Metal Undersize | 0.25 | p. 19 |
| Thrust Metal Oversize | 0.25 | p. 5 |
Yanmar 4TNE88-ETB, 4TNV88-QTB Common Problems This Manual Covers
Yanmar TB145 engine running hot with a worn or slipping cooling fan belt p. 22
Inspect the cooling water system parts diagram on page 22. Locate the A-39 type V-belt required for the 4TNE88-(E) TB (1) engine. Cross-reference the fan and water pump pulley part numbers in the list to ensure correct belt fitment for your specific serial number.
Manual Section: Cooling Water SystemLow oil pressure warning light stays illuminated on the dashboard immediately after a cold start p. 65
Check the exploded view for the correct oil pressure switch. Verify the switch is rated for the 0.5KG setting shown on page 65 for the 4TNV88-QTB engine. Order the matching switch and sealing washer from the parts list to correct the warning light issue.
Manual Section: Lub. Oil SystemBottom end knocking noise requiring correct identification of replacement crankshaft main metal bearings p. 18
Review the drivetrain parts diagram on page 18. Identify the correct main metal bearings for your block. If the crankshaft is machined, select the 0.25 main metal undersize bearings listed on page 19. Match these exact part numbers to your specific block assembly.
Manual Section: Crankshaft & PistonDead battery every morning because the generator assembly fails to maintain proper electrical charge p. 34
Locate the generator exploded view on page 34. Identify the correct 40A generator assembly specified on page 81 for the 4TNV88-QTB engine. Verify the rotor, bearings, and regulator part numbers in the index to rebuild or replace the complete charging unit.
Manual Section: GeneratorFrequently Asked Questions
How do you fix yanmar TB145 engine running hot with a worn or slipping cooling fan belt?
Inspect the cooling water system parts diagram on page 22. Locate the A-39 type V-belt required for the 4TNE88-(E) TB (1) engine. Cross-reference the fan and water pump pulley part numbers in the list to ensure correct belt fitment for your specific serial number.
How do you fix low oil pressure warning light stays illuminated on the dashboard immediately after a cold start?
Check the exploded view for the correct oil pressure switch. Verify the switch is rated for the 0.5KG setting shown on page 65 for the 4TNV88-QTB engine. Order the matching switch and sealing washer from the parts list to correct the warning light issue.
How do you identify the correct crankshaft bearings when rebuilding a Yanmar 4TNE88 engine?
Review the drivetrain parts diagram on page 18. Identify the correct main metal bearings for your block. If the crankshaft is machined, select the 0.25 main metal undersize bearing from the parts list. Cross-reference the connecting rod part numbers to confirm the correct rod bearings for your serial number range before ordering.
Where do I find the fuel injection pump component breakdown and plunger part numbers for the 4TNE88-ETB?
Turn to pages 24 through 25 for the fuel injection pump exploded view. Locate the plunger, delivery valve, and control rack part numbers for your specific variant (4TNE88-ETB or 4TNV88-QTB). The feed pump and solenoid are listed separately — verify the solenoid part number matches your engine serial before ordering, as variants differ.
What cylinder head valve train components are listed in this parts catalog for the Yanmar 4TNE88-ETB?
Refer to pages 10 through 11 for the cylinder head and bonnet assembly. The parts list includes valve guides, intake and exhaust valves, valve springs, retainers, stem seals, and the full rocker arm assembly. Use the interchangeability notes in the catalog to confirm which components are shared across the 4TNE88 and 4TNV88 engine families.
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