Part of the Yanmar Parts Manuals.
All 25 pages of this Yanmar 4TNE98-NMH Nacco Parts Catalog PDF (OEM #0CW10-G01400) are built around one job: identifying and ordering the right parts for your 2005 4TNE98-NMH engine. Inside, you get exploded-view diagrams for every major assembly, from cylinder block and gear housing through crankshaft and piston, fuel injection pump, starting motor, generator, and gasket set. Each diagram pairs with a complete parts list showing OEM part numbers and component names so you can confirm the correct piece before you order. Match the generator output to 12V/60A and confirm the 2.3 kW starter spec before ordering either unit. No more hunting part numbers across a dozen catalogs. Bookmarked by assembly, search any component name, pull the OEM number, and place your order from any device.
What's Inside This Yanmar 4TNE98-NMH (Nacco) Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| Preface. | 2-3 | - |
| Content. | 4 | - |
| Cylinder Block | 5 | Cylinder Block Assy, Camshaft Bush, Main Bearing Set, Thrust Bearing Assy, Head Gasket |
| Gear Housing | 6 | Gear Case Cover Assy, Oil Seal, Fuel Injection Pump Cover, Filler Cover, Gear Case, Lub. Oil Pump Assy, Liquid Gasket |
| Oil Sump | 7 | Oil Sump Assy, Liquid Gasket, Oil Seal Case Assy, Oil Seal N Case Assy, Seal HTC95 |
| Cylinder Head & Bonnet | 8 | Engine Lifter, Cylinder Head Assy, Suction Valve, Exhaust Valve, Valve Spring, Spring Retainer, Valve Stem Seal, Valve Cap |
| Suction & Exhaust Manifold | 9 | Suction Manifold Gasket, Int Manifold, Exhaust Manifold, Gasket, Joint |
| Camshaft & Driving Gear | 10 | Tappet, Push Rod, Camshaft Assy, Thrust Metal, Camshaft Gear, Idler Shaft, Idle Gear Assy, Idle Gear Bush |
| Crankshaft & Piston | 11 | Crankshaft Comp, Crankshaft Gear, V-pulley, Piston Assy, Ring Set, Connecting Rod Assy, Piston Pin Bush, Crankpin Metal Assy |
| Lub.Oil System | 12 | Dipstick, Dipstick Guide, Filter 80X80L, Lub. Oil Pipe Assy, Lub. Oil Switch |
| Cooling Water System | 13 | Cooling Water Pump V-pulley, V-belt A: Inch, Thermostat Gasket, Thermostat Cover, Gasket, Thermostat, Cooling Water Pump Gasket, Cooling Water Pump Pipe |
| Fuel Injection Pump | 14-16 | Axel Wire Bracket, Retainer, Bracket Stay, Fuel Oil Pump Assy |
| Fuel Injection Valve | 17 | Injection Valve Assy, Nozzle Assy, Retainer, Fuel Injection Pipe No, F.o.return Pipe Assy, Fuel Return Pipe, Return Gasket |
| Fuel Filter | 18 | Fuel Oil Filter, Sub. Assy Body, Lebel Censor Assy, Element Kit, Filter, Fuel Pipe, Fuel Oil Strainer |
| Starting Motor | 19 | Starter, Armature Assy, Field Coil Assy, Brush, Brash Holder Assy, Rear Cover, Magnetic Switch Assy, Shift Lever Set |
| Generator | 20 | 12V-60A Generator, Pulley, Frame Assy, Plate, Rotator Assy, Bearing Cover, Flame, Brush Holder |
| Gasket Set | 21 | Head Gasket, Valve Stem Seal, Nozzle Protecter, Nozzle Gasket, Bonnet Gasket, Suction Manifold Gasket, Cooling Water Pump Gasket |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Starter Power | 2.3KW | p. 19 |
| V-Belt Size | A:45 inch | p. 13 |
| Starter Motor Power | 2.3 kW | p. 19 |
| Generator Voltage | 12 V | p. 20 |
| Generator Current | 60 A | p. 20 |
| Nut Thread Specification | M8 x 1.0 | p. 8 |
| Main Bearing Undersize | 0.25 mm | p. 11 |
| Piston Ring Set Oversize | 0.25 mm | p. 11 |
| Thrust Bearing Oversize | 0.25 mm | p. 11 |
Yanmar 4TNE98-NMH (Nacco) Common Problems This Manual Covers
Yanmar 4TNE98-NMH Nacco engine cranks over too slowly in cold weather or will not start p. 19
Inspect the electrical parts breakdown on page 19 to locate replacement 2.3 kW starter motor components. Verify the exact part number for the armature assembly or magnetic switch before ordering. Cross-reference the pinion gear assembly in the list to ensure correct fitment for your engine block.
Manual Section: Starting MotorEngine overheats after 20 minutes of work and needs a new water pump and drive belt p. 13
Review the cooling system exploded view on page 13 to identify the correct water pump assembly. Locate the matching A:45 inch V-belt and thermostat in the parts list. Confirm the correct gasket part number is included in your order to prevent coolant leaks after installation.
Manual Section: Cooling Water SystemCannot find the correct part numbers for oversized piston rings and bearings during engine block rebuild p. 11
Examine the internal engine components on page 11 to find the 0.25 mm oversize piston ring set. Match your required 0.25 mm undersize main bearing and thrust bearing assemblies to the corresponding reference numbers in the diagram. Order the exact items listed for your application.
Manual Section: Crankshaft & PistonBattery drains during operation and needs replacement alternator components for the charging system p. 20
Check the generator diagram on page 20 to find replacement parts for the 12 V, 60 A charging unit. Identify the exact frame assembly, rotator assembly, or regulator assembly part numbers. Match the reference numbers to the component list before ordering your replacements.
Manual Section: GeneratorFrequently Asked Questions
How do you fix yanmar 4TNE98-NMH Nacco engine cranks over too slowly in cold weather or will not start?
Inspect the electrical parts breakdown on page 19 to locate replacement 2.3 kW starter motor components. Verify the exact part number for the armature assembly or magnetic switch before ordering. Cross-reference the pinion gear assembly in the list to ensure correct fitment for your engine block.
How do you fix engine overheats after 20 minutes of work and needs a new water pump and drive belt?
Review the cooling system exploded view on page 13 to identify the correct water pump assembly. Locate the matching A:45 inch V-belt and thermostat in the parts list. Confirm the correct gasket part number is included in your order to prevent coolant leaks after installation.
How do you fix cannot find the correct part numbers for oversized piston rings and bearings during engine block rebuild?
Examine the internal engine components on page 11 to find the 0.25 mm oversize piston ring set. Match your required 0.25 mm undersize main bearing and thrust bearing assemblies to the corresponding reference numbers in the diagram. Order the exact items listed for your application.
How do you fix battery drains during operation and needs replacement alternator components for the charging system?
Check the generator diagram on page 20 to find replacement parts for the 12 V, 60 A charging unit. Identify the exact frame assembly, rotator assembly, or regulator assembly part numbers. Match the reference numbers to the component list before ordering your replacements.
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