All 42 pages of this Yanmar 3TNV88-BPTBZ / TB138FR parts catalog are built around one goal: getting the right part number before you place an order. Inside, exploded-view diagrams walk you through every major assembly: cylinder block, gear housing, flywheel housing and oil sump, cylinder head, intake and exhaust manifolds, camshaft and driving gear, crankshaft and piston, lube oil system, cooling water system, fuel injection pump and inner parts, governor, fuel injection valve, fuel line, starting motor, generator, and gasket set. Each diagram shows individual components labeled with OEM part numbers and cross-references for direct identification. The crankshaft parallel pin is 8x16 mm; the fuel injection pump Woodruff key is 4x16 mm. Stop ordering by memory or forum guesses. Pull up this bookmarked PDF on your phone, jump straight to the system you're working on, and order the right part the first time.
What's Inside This Yanmar 3TNV88-BPTBZ, TB138FR Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| Cylinder Block | 7-8 | Cylinder Block Assy, Camshaft Bush, Thrust Metal, Gasket, Main Bearing Set Repair Part, Main Metal Under-Sized Part, Thrust. Over-Sized Part Metal |
| Gear Housing | 9-10 | Gear Case Assy, Oil Seal, Gear Case Flange, Filler Cover, Hydraulic Oil Pump Cover, Knock Pipe, Blind Cover |
| Flywheel Housing & Oil Sump | 11-12 | Flywheel Housing, Flywheel Cover Cap, Oil Sump Spacer, Lub. Oil Sump Assy, Oil Seal Case Assy, Oil Seal |
| Cylinder Head & Bonnet | 13-14 | Engine Lifter, Rocker Shaft Assy, Rocker Arm Shaft, Rocker Arm Support, Spring, Rocker Arm Assy, Valve Cap, Cylinder Head Assy |
| Suction Manifold | 15-16 | Breather Pipe, Int Manifold Assy, Breather Joint, Gasket, Joint |
| Exhaust Manifold & Silencer | 17-18 | Exhaust Manifold Gasket, Exhaust Manifold, Silencer Gasket, Silencer |
| Camshaft & Driving Gear | 19-20 | Tappet, Push Rod, Camshaft Assy, Thrust Metal, Camshaft Gear, Idle Gear Shaft, Idle Gear Assy, Idle Gear Repair Part Bush |
| Crankshaft & Piston | 21-22 | Crankshaft Assy, Crankshaft Gear, Crankshaft V-Pulley, Flywheel Assy, Ring Gear, Piston Assy, Piston Ring Set, Connecting Rod Assy |
| Lub.Oil System | 23-24 | Lub. Oil Pump Assy, Lub. Oil Pump Gasket, Lub. Oil Dipstick, Dipstick Guide, Gasket, Oil Inlet Pipe Assy, Filter Bracket Assy, Filter 80X80L |
| Cooling Water System | 25-26 | Water Pump Assy, Gasket, Plate, Joint, Thermo. Case Gasket, Round Gasket, Cooling Water Pump V-Pulley, V-Belt A38 |
| Fuel Injection Pump | 27-28 | Injecton Pump Assy Governor Assy Isincorporated in This Fuelinjection, Stopper, Dilevery Valve Assy, Spring, Delivery Holder, Lifter, Timer Set, Timer Cmp |
| Governor | 29-30 | Case Packing, Packing, Spring, Regulator Lever, Shaft Retainer, Case Cover, Stop Solenoid |
| Fuel Injection Valve | 31-32 | Fuel Injector, Nozzle Assy, Nozzle Holder Assy, Nozzle Spring, Nozzle Spring Seat, Stop Plate, Injection Pipe Retainer, Injection Pipe Assy |
| Fuel Line | 33-34 | Fuel Filter Bracket, Spacer Filter Bra, Fuel Oil Filter, Fuel Oil Pipe Assy, Fuel Pump, Separator Assy, Retaining Ring, Element |
| Starting Motor | 35-36 | Starter, Magnetic Switch Assy, Armature Assy, Yoke Assy, Brush Holder Assy, Brush, Brush Spring, Rear Cover Assy |
| Generator | 37-38 | Alternator, Rotor Assy, Bearing Cover, Drive Flame Assy, Plate, Rear Flame Assy, Pulley, Collar |
| Gasket Set | 39 | Gasket Set Optional Part, Gasket, Valve Stem Seal, Nozzle Protector, Nozzle Seat, Bonnet Gasket, Exhaust Manifold Gasket, Silencer Gasket |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Crankshaft Parallel Pin Size | 8x16 mm | p. 21 |
| Crankshaft Key Size | 7x14 mm | p. 21 |
| Fuel Injection Pump Woodruff Key Size | 4x16 mm | p. 27 |
Yanmar 3TNV88-BPTBZ, TB138FR Common Problems This Manual Covers
Yanmar 3TNV88-BPTBZ engine knock during operation requiring a bottom end rebuild to replace crankshaft parallel pins p. 21
Inspect the Crankshaft & Piston exploded view on page 21. Locate the correct part number for the 8x16 mm crankshaft parallel pin. Cross-reference this specific part number in the master index to ensure correct ordering for your rebuild.
Manual Section: Crankshaft & PistonSevere vibration and timing loss pointing to a sheared keyway on the main engine crankshaft pulley p. 21
Check the parts breakdown on page 21 to find the replacement v-pulley and crankshaft gear. Identify the correct part number for the 7x14 mm crankshaft key. Verify this hardware matches your engine block serial number before ordering the replacement components.
Manual Section: Crankshaft & PistonHard or no start condition after continuous bleeding attempts pointing to a worn fuel injection pump p. 27
Remove the injection pump assembly and check the component diagram on page 27. Identify the specific delivery valve assembly and the 4x16 mm woodruff key required for the pump shaft. Match these precise components against the parts list to order replacements.
Manual Section: Fuel Injection PumpFrequently Asked Questions
How do you fix yanmar 3TNV88-BPTBZ engine knock during operation requiring a bottom end rebuild to replace crankshaft parallel pins?
Inspect the Crankshaft & Piston exploded view on page 21. Locate the correct part number for the 8x16 mm crankshaft parallel pin. Cross-reference this specific part number in the master index to ensure correct ordering for your rebuild.
How do you fix severe vibration and timing loss pointing to a sheared keyway on the main engine crankshaft pulley?
Check the parts breakdown on page 21 to find the replacement v-pulley and crankshaft gear. Identify the correct part number for the 7x14 mm crankshaft key. Verify this hardware matches your engine block serial number before ordering the replacement components.
How do you fix hard or no start condition after continuous bleeding attempts pointing to a worn fuel injection pump?
Remove the injection pump assembly and check the component diagram on page 27. Identify the specific delivery valve assembly and the 4x16 mm woodruff key required for the pump shaft. Match these precise components against the parts list to order replacements.
How quickly can I access this manual after buying?
Immediate download of the complete 42-page searchable Parts Catalog. Access it on any device, from a laptop at your desk to a phone in the field.
Can I print specific sections of this manual?
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, meaning the content is primarily image-based. However, an OCR layer is present throughout, so you can search and copy the full text of the document. The text quality is crisp and generally easy to read, with only minor scanning artifacts visible on some characters. All diagrams and illustrations are raster images, which means labels are readable at standard viewing but will pixelate if you zoom in closely. Pages are clean with no significant marks or stains, though page 5 is a blank "Memo" page.
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