All 44 pages of this Yanmar TB145 Parts Catalog (OEM #P-TB145EBB) identify every factory component across the 4TNV88-QTB(cab) and QTB1(canopy) engine variants. Open it to exploded-view diagrams that run the full engine: cylinder block, gear housing, crankshaft and piston assemblies, fuel injection pump with inner parts and governor, cooling water circuit, starting motor, alternator, and a complete gasket set. You get OEM part numbers and cross-references for every callout in every diagram, so the right part number is confirmed before you call the dealer. The fuel line section puts your injection pipe at D13 x L400; parallel pins are called out at 8 x 16 mm. Stop ordering the wrong part. Bookmarked by system and keyword-searchable, open it on your phone at the parts counter and get the exact number on the first try.
What's Inside This Yanmar 4TNV88-QTB / QTB1 (TB145) Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| Cylinder Block | 6-7 | Cylinder Block Assy, Camshaft Bush, Main Bearing Set Repair Part, Thrust Metal, Cylinder Head Gasket, Spacer, Main Metal Under-Sized Part, Thrust. Over-Sized Part Metal |
| Gear Housing | 8-9 | Gear Case Assy, Oil Seal, Pump Cover Assy, Lub. Oil Pump Cover, Relief Valve, Spring, Gear Case Frange, Filler Cover |
| Flywheel Housing & Oil Sump | 10-11 | Flywheel Housing, Flywheel Cover Cap, Oil Sump Spacer, Lub. Oil Sump Assy, Oil Seal Case Assy, Oil Seal, Liquid Optional Part Gasket |
| Cylinder Head & Bonnet | 12-13 | Cylinder Hed Assy, Valve Repair Part Guide, Intake Valve, Exhaust Valve, Valve Spring, Spring Retainer, Valve Stem Seal, Valve Cap |
| Suction Manifold & Air Cleaner | 14-15 | Breather Pipe, Int Manifold, Int.manofold Gasket, Air Heater, Air Heater Gasket, Gasket, Bend, Intake Pipe |
| Exhaust Manifold & Silencer | 16-17 | Exhaust Manifold, Exhaust Manifold Gasket, Silencer, Silencer Gasket, Silencer Pipe |
| Camshaft & Driving Gear | 18-19 | Tappet, Push Rod, Camshaft Assy, Thrust Metal, Camshaft Gear, Idle Gear Shaft, Idle Gear Assy, Idle Gear Repair Part Bush |
| Crankshaft & Piston | 20-21 | Crankshaft Assy, Crankshaft Gear, Crankshaft V-Pulley, Flywheel Assy, Ring Gear, Piston Assy, Piston Ring Set, Connecting Rod Assy |
| Lub.Oil System | 22-23 | Lub. Oil Dipstick, Dipstick Guide, Gasket, Lub. Oil Pipe Assy, Oil Cooler Assy, Filter Bracket Assy, Lub. Oil Switch, Joint Bolt Assy |
| Cooling Water System | 24-25 | Water Pump Assy, Gasket, Plate, Joint, Thermo. Case Gasket, V-Pulley, V-Pulley S, V-Belt |
| Fuel Injection Pump | 26-27 | Fuel Injection Pump Assy, Fip Support, Stop Solenoid, Bolt |
| Fuel Injection Pump (Inner Parts) | 28-29 | Joint, Stopper, Dilevery Valve Assy, Spring, Delivery Holder, Cooling Water Joint, Lifter, Timer Set |
| Governor (Inner Parts) | 30-31 | Case Packing, Packing, Spring, Regulator Lever, Stop Solenoid, Case Cover |
| Fuel Injection Valve | 32-33 | Fuel Injector, Nozzle Assy, Nozzle Holder Assy, Nozzle Spring, Nozzle Spring Seat, Stop Plate, Injection Pipe Retainer, Retainer |
| Fuel Line | 34-35 | Filter Bracket, Fuel Filter, Fuel Oil Pipe Assy, Fuel Pipe, Fuel Pump, Separator Assy, Retaining Ring, Element |
| Starting Motor | 36-37 | Starter, Pinion Shaft, Armature Assy, Field Coil Assy, Brush, Rear Cover, Brash Holder Assy, Brush Spring |
| Generator | 38-39 | Belt Adjuster, Alternator, Rotor Assy, Bearing Cover, Drive Flame Assy, Plate, Rear Flame Assy, Pulley |
| Gasket Set | 40-44 | Gasket Set Optional Part, Cylinder Head Gasket, Valve Stem Seal, Nozzle Protector, Nozzle Seat, Cover Gasket, Gasket, Exhaust Manifold Gasket |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Fuel Pipe Dimensions | D13 x L400 | p. 35 |
| Parallel Pin Dimensions | 8x16 mm | p. 11 |
| Spring Pin Dimensions | 6x12 mm | p. 13 |
| Bolt M8x85 Dimensions | M8x85 | p. 9 |
| Bolt M6x16 Dimensions | M6x16 | p. 9 |
Yanmar 4TNV88-QTB / QTB1 (TB145) Common Problems This Manual Covers
Yanmar TB145 4TNV88 engine hard to start in cold - need correct glow plug part number p. 14
Open the Suction Manifold & Air Cleaner exploded view on page 14. The intake manifold heater (grid heater) part is listed there. Cross-reference the cylinder head section on page 12 for individual glow plug positions. Verify your serial number range before ordering - the cab model (QTB) and canopy model (QTB1) may use different harness connectors shown in the same diagram.
Manual Section: Suction Manifold & Air CleanerCan't identify the correct fuel filter and fuel-water separator part numbers for a scheduled service p. 34
Check the Fuel Line exploded view on page 34. Both the inline fuel filter and the separator assembly are itemized there with individual part numbers. The main fuel pipe runs D13 x L400 (page 35) - confirm the replacement filter fits that line diameter before ordering. Cross-reference the parts index to confirm fitment across all TB145 serial ranges.
Manual Section: Fuel LineNeed part numbers for water pump impeller and thermostat after overheating incident p. 24
Go to the Cooling Water System exploded view on page 24. The water pump assembly, impeller, V-pulley, fan, thermostat, and sub-tank are all broken out with individual part numbers. Order the pump assembly or impeller separately depending on what failed. Confirm the gasket part number from the same diagram - reusing the old gasket after a pump pull is a common source of repeat leaks.
Manual Section: Cooling Water SystemSourcing injector nozzle and nozzle holder separately - unclear which parts are listed individually p. 32
The Fuel Injection Valve section on page 32 shows the injector broken into the nozzle assembly, nozzle holder assembly, spring, and injection pipe assembly - each with its own part number. If only the nozzle tip is damaged, you can order the nozzle assembly alone rather than the full injector. Check the Gasket Set index on page 42 for the injector copper sealing washer part number before reassembly.
Manual Section: Fuel Injection ValveIdentifying correct head gasket and valve stem seals for a top-end rebuild after coolant or oil smoke p. 40
The Gasket Set section covers pages 40-44. The cylinder head gasket (CYL.HEAD), valve stem seals, exhaust manifold gasket, and fuel injection pump O-rings are all listed there. Pull the full gasket set part number from page 42 index - ordering the complete set is more reliable than sourcing individual pieces and ensures all mating surfaces get fresh seals in one job.
Manual Section: Gasket SetCan't match crankshaft main bearing set part number to engine serial for a high-hour rebuild p. 7
The Cylinder Block parts list on page 7 includes the main bearing set along with block assembly, camshaft bushings, and related hardware. Note your exact engine model designation (cab QTB vs. canopy QTB1 vs. P-TB145EBB) before ordering bearings - cross-reference the parts index to confirm the bearing set applies to your serial number range. The Crankshaft & Piston section on page 20 lists connecting rod bearings separately if those also need replacement.
Manual Section: Cylinder BlockFrequently Asked Questions
What are the replacement specifications for fuel filters?
For replacement, the fuel filter is part number Y119802-55800. Additionally, the fuel separator assembly is Y129906-55700, and its element is Y119802-55710.
What are the replacement specifications for air filter?
For air filter replacement, the air cleaner assembly is part number Y129612-12681. The outer element for the air cleaner is specified as part number Y119808-12520.
How do you fix yanmar TB145 4TNV88 engine hard to start in cold - need correct glow plug part number?
Open the Suction Manifold & Air Cleaner exploded view on page 14. The intake manifold heater (grid heater) part is listed there. Cross-reference the cylinder head section on page 12 for individual glow plug positions. Verify your serial number range before ordering - the cab model (QTB) and canopy model (QTB1) may use different harness connectors shown in the same diagram.
How do you fix can't identify the correct fuel filter and fuel-water separator part numbers for a scheduled service?
Check the Fuel Line exploded view on page 34. Both the inline fuel filter and the separator assembly are itemized there with individual part numbers. The main fuel pipe runs D13 x L400 (page 35) - confirm the replacement filter fits that line diameter before ordering. Cross-reference the parts index to confirm fitment across all TB145 serial ranges.
What format is this manual in?
Immediate download of the complete 44-page searchable Parts Catalog. Access it on any device, from a laptop at your desk to a phone in the field.
Is this Yanmar TB145 4TNV88-QTB(cab) & variants Parts Catalog printable?
Yes. The PDF has no DRM restrictions, so print any page or section you need for your shop. Works with any standard printer.
Document Quality
This document is a scanned PDF with an OCR layer, allowing you to search and copy the full text. The text throughout the catalog is crisp and consistently easy to read across all pages. Diagrams and illustrations are raster images, not vector, but their labels and details remain clear and legible even when zoomed. Pages are clean with no noticeable scan artifacts, stains, or skewed content. Please note that page 4 is an intentional blank "Memo" page.
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