Need the factory part numbers for your Yanmar 4TNV88C-STB/STB1 engine? This 48-page parts catalog lays out the complete STB/STB1 through exploded-view figures covering everything from the Cylinder Block and Gear Housing to the Diesel Particulate Filter, ECU, and Electric Parts harness assemblies. Inside: every component identified by Yanmar part number, with cross-references running through the Cylinder Head, Camshaft, Crankshaft and Piston assemblies, Fuel Injection Valve, and the full Gasket Set and Tools section. Cross-referencing the DPF? Soot Filter, Case, and individual Sensor assemblies are each listed as distinct numbered parts. Over on the fuel side, the CR Rail Assy, PLV4 Valve, and injector pipe sets each carry their own line item, so you know exactly what to order. No more guessing part numbers from a blurry parts fiche. PDF opens on any device; bookmarks take you straight to the Cylinder Block, DPF, or fuel system in one tap.
What's Inside This Yanmar 4TNV88C-STB/STB1 Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| Cylinder Block | 6-7 | Block Assy, Plug, Bolt, Bush, Bearing, Gasket |
| Gear Housing | 8-9 | Case, Gear, Pin, Cover, O-Ring, Bolt |
| Flywheel Housing & Oil Sump | 10-11 | Housing, Flywheel, Oil Sump, Pin, Bolt, Seal |
| Cylinder Head & Bonnet | 12-13 | Cylinder Head, Bonnet Assy, Rocker Arm, Valve, Gasket, Sensor |
| Suction Manifold & Air Cleaner | 14-15 | Manifold Cmp, Intake, Air Cleaner, Sensor, Throttle Body, Gasket |
| Exhaust Manifold | 16-17 | - |
| Diesel Particulate Filter (DPF) | 18-21 | DPF Assy, Sensor, Silencer, Case, Soot Filter, Gasket |
| Camshaft & Driving Gear | 22-23 | Camshaft Assy, Tappet, Bearing, Gear, Idle Gear, Sensor |
| Crankshaft & Piston | 24-25 | Crankshaft Assy, Piston Assy, Ring Assy, Connecting Rod, Bearing |
| Lub.Oil System | 26-27 | Pump Assy, Lub. Oil, Dipstick, Oil Cooler, Filter, Pipe Assy |
| Cooling Water System | 28-29 | Pump Assy, Water, Thermostat, Fan, Cooling, Hose Assy, Tank Assy |
| Fuel Supply Pump | 30-31 | Pump Assy, Fuel, Valve Assy, Mprop, Sensor, Temperature, O-Ring, Fuel Pump |
| Fuel Injection Valve | 32-33 | Injector, CR, Rail Assy, Sensor, Railpressure, Valve Assy, PLV4, Pipe Assy |
| Fuel Pipe | 34-35 | Pipe Assy, Fuel, Clamp, Fuel Feed Pump Assy, Fuel Filter, Breather, Sensor Assy |
| Starting Motor | 36-37 | Starter, Switch Assy, Armature Assy, Brush, Pinion Assy, Clutch Assy |
| Generator | 38-39 | Rotor Assy, Bearing, Frame Assy, Pulley, Regulator Assy |
| Electronic Control Unit(ECU) | 40-41 | - |
| Electric Parts | 42-43 | Bracket, Connector, Clip, Harness, B Eco Engine, Harness C, Eco Engine, Boot |
| Gasket Set & Tools | 44-48 | Packing, Gasket, O-Ring, Seal, Valve Stem, Wrench, Spanner |
Yanmar 4TNV88C-STB/STB1 Common Problems This Manual Covers
Yanmar 4TNV88C-STB cylinder head gasket part number unclear, STB and STB1 variants show different assembly codes in the index p. 12
Open the Cylinder Head & Bonnet exploded view on page 12. Locate the gasket callout in the diagram, then match that item number to the parts list on page 13. Cross-reference the same gasket part number against the Gasket Set index on page 44, which groups head gaskets, valve stem seals, and O-rings by engine variant. Confirm your serial number suffix (STB vs STB1) before ordering.
Manual Section: Cylinder Head & BonnetDPF soot filter part number can't be confirmed, multiple DPF assembly configurations appear in the catalog p. 18
Turn to the Diesel Particulate Filter exploded view on page 18. Identify the soot filter callout separately from the DPF Assy and Silencer Case items. The parts list on page 19 breaks out the Soot Filter, Sensor, and Gasket as individual line items. Cross-reference the gasket set on page 44 if you need the DPF gasket part number alongside the filter itself.
Manual Section: Diesel Particulate Filter (DPF)Common rail fuel injector part number for this engine won't resolve, CR rail assembly and PLV4 valve listed separately without a kit grouping p. 32
Check the Fuel Injection Valve exploded view on page 32. The Injector, CR Rail Assy, Rail Pressure Sensor, and PLV4 Valve Assy are called out as separate items with individual part numbers on page 33. If you need the high-pressure fuel pipe that connects to the rail, that is cataloged separately starting on page 34 under Fuel Pipe.
Manual Section: Fuel Injection ValveCrankshaft bearing part number unclear, standard vs undersize options not distinguishable from the parts list alone p. 24
Open the Crankshaft & Piston exploded view on page 24. The parts list on page 25 itemizes Crankshaft Assy, Connecting Rod, Ring Assy, and Bearing as separate callouts. Bearing entries typically include suffix codes indicating size class. Match the callout number to the exact line item before ordering. If a cylinder block bearing bush is also needed, that is listed on page 7 under Cylinder Block.
Manual Section: Crankshaft & PistonStarting motor sub-component part numbers missing, need brush set and pinion assembly listed individually for rebuild p. 36
Go to the Starting Motor exploded view on page 36. The parts list on page 37 breaks the starter into Armature Assy, Brush, Pinion Assy, and Clutch Assy as separate line items. Identify each callout number in the diagram, then match to the parts list. The Switch Assy is also listed here if the solenoid is being replaced at the same time.
Manual Section: Starting MotorGear housing O-ring and gasket part numbers needed for timing cover removal, catalog references multiple O-Ring entries with no clear grouping p. 8
Reference the Gear Housing exploded view on page 8. The parts list on page 9 itemizes the O-Ring, Gear, Pin, and Cover separately. For a complete seal kit including all O-rings and gaskets in this assembly, cross-reference the Gasket Set index on page 44, which lists O-Ring and Packing components by system. Confirm each item number matches the page 9 callout before ordering.
Manual Section: Gear HousingFrequently Asked Questions
How do I reset the Yanmar 4TNV88C-STB/STB1 fault code?
When replacing certain parts, such as the DPF ASSY (part number Y129A20-16060), it is necessary to update the software of the ECU using a designated service tool. This process, detailed in the Service Manual, is essential for proper function and would typically involve clearing any related fault codes. Refer to the Service Manual for details on using the designated service tool.
How do I clear the ECU on a Yanmar 4TNV88C-STB/STB1?
To clear the ECU, specifically when replacing the ECU ASSY, SERVICE YMR (part number Y129A00-75910), it is necessary to update the software of the ECU using a designated service tool. This procedure is crucial for proper operation and is detailed in the Service Manual.
how to reset Yanmar 4TNV88C-STB/STB1 error code
Resetting error codes is typically part of the ECU software update process required when replacing specific components, such as the FUEL SUPPLY PUMP ASSY (part number Y129A00-51000). This update must be performed using a designated service tool, with full instructions available in the Service Manual.
how to clear Yanmar 4TNV88C alarm code
Clearing alarm codes is implied through the requirement to update the ECU software with a designated service tool when replacing parts like the INJECTOR, CR (part number Y129A00-53100). The detailed procedure for this ECU software management is found in the Service Manual.
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