Part of the Yanmar Parts Manuals.
Need the right part number for your Yanmar 4TNE98-BQFLC? This 21-page parts catalog (OEM #Y00W2770) maps every replaceable component across the complete engine assembly. Exploded views walk you through the cylinder block, gear housing, flywheel housing, crankshaft, and piston groups, with each piece tagged by OEM part number for direct ordering. Inside you'll find the full fuel system: injection pump, injection valve, and fuel filter, plus the lub oil system, cooling water system, starting motor, generator, and a complete gasket set index. When you're chasing a replacement for the 2.3KW starting motor, every sub-component from armature and pinion to the magnetic switch assembly is called out with its own part number. No more cross-referencing three catalogs to find one gasket. Bookmarked and searchable, this PDF puts the right part number in your hand before you walk to the parts counter.
What's Inside This Yanmar 4TNE98-BQFLC (Forklift) Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| Cylinder Block | 4 | Cylinder Block Assy, Camshaft Bush, Thrust Bearing Assy, Main Bearing Set, Head Gasket |
| Gear Housing | 5 | Gearcase Cover Cmp, Oil Seal, Fuel Injection Pump Cover, Filler Cover, Lub. Oil Pump Assy, Hydraulic Oil Pump Cover, Bearing # |
| Flywheel Housing & Oil Sump | 6 | Flywheel Housing, Oil Seal, Oil Sump Assy, Pin |
| Cylinder Head & Bonnet | 7 | Engine Lifter, Cylinder Head Assy, Suction Valve, Exhaust Valve, Valve Spring, Spring Retainer, Valve Stem Seal, Valve Cap |
| Suction & Exhaust Manifold | 8 | Suction Manifold Gasket, Int Manifold, Exhaust Manifold, Gasket, Joint, Silencer Gasket |
| Camshaft & Driving Gear | 9 | Tappet, Push Rod, Camshaft Assy, Thrust Metal, Camshaft Gear, Idler Shaft, Idle Gear Assy, Idle Gear Bush |
| Crankshaft & Piston | 10 | Crankshaft Comp, Crankshaft Gear, Crankshaft V-pulley, Piston Assy, Ring Set, Connecting Rod Assy, Crankpin Metal Assy, Piston Pin Bush |
| Lub.Oil System | 11 | Dipstick, Dipstick Guide, Filter 80X80L, Lub. Oil Pipe Assy, Lub. Oil Switch, Pipe |
| Cooling Water System | 12 | Pulley, V-belt, Fan, Thermostat Gasket, Thermostat Cover, Gasket, Thermostat, Cooling Water Pump Gasket |
| Fuel Injection Pump | 13 | Retainer, Bracket Stay, Fuel Oil Pump Assy, Axel Wire Bracket |
| Fuel Injection Valve | 14 | Injection Valve Assy, Nozzle Assy, Retainer, Fuel Injection Pipe No, F.o.return Pipe Assy, Fuel Return Pipe, Return Gasket |
| Fuel Filter | 15 | Fuel Oi Filter Assy, Filter Body Assy, Level Sensor Assy, Filter Element Assy, Fuel Pipe, Fuel Oil Strainer |
| Starting Motor | 16 | Starter, Armature Assy, Field Coil Assy, Brush, Brash Holder Assy, Rear Cover, Magnetic Switch Assy, Shift Lever Set |
| Generator | 17 | Rotor Assy, Front Bracket Assy, Pulley, Rear Bracket, Spacer, Belt Ajuster, Qgs Controller |
| Gasket Set | 18-21 | 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 Motor Power | 2.3KW | p. 16 |
Yanmar 4TNE98-BQFLC (Forklift) Common Problems This Manual Covers
Yanmar 4TNE98-BQFLC cylinder head gasket part number unclear across multiple gasket set catalog pages p. 18
Turn to the Gasket Set index on page 20, which organizes head gaskets, valve stem seals, and O-rings by assembly. Match your cylinder head assembly number from page 7 to the corresponding gasket set entry. Pages 18-21 cover the complete sealing catalog; cross-reference all four pages before ordering to avoid missing companion seals.
Manual Section: Gasket SetStarter motor fails to engage, need armature, pinion, or brush replacement part numbers p. 16
Open the Starting Motor exploded view on page 16. This is a 2.3KW starter; confirm your unit matches before sourcing components. The armature assembly, ball bearings, brush set, and magnetic switch assembly are each listed as separate line items. Identify the failed subcomponent before ordering to avoid returning incompatible parts.
Manual Section: Starting MotorWrong injector parts ordered due to confusion between fuel pump and injection valve catalog sections p. 14
Split your parts search across two separate sections. Check page 13 for Fuel Injection Pump components: pump assembly, O-rings, retainer, and fuel valve. Then check page 14 for Fuel Injection Valve parts: nozzle assembly, shim set, and injection pipes. Ordering from the wrong section is the leading sourcing error on this engine family.
Manual Section: Fuel Injection ValveWater pump or thermostat part numbers needed for cooling system service but catalog layout is unclear p. 12
Go directly to the Cooling Water System exploded view on page 12. The water pump assembly, thermostat, V-belt, fan, and pulley are itemized separately. Cross-reference the pulley and V-belt together before ordering; both wear on the same service interval and the catalog lists them as individual line items requiring separate part numbers.
Manual Section: Cooling Water SystemOil leaking from flywheel housing or sump area, correct seal part number not found p. 6
Check page 6 for the Flywheel Housing and Oil Sump exploded view, which lists the drain plug, oil seal, and sump assembly as individual items. If the leak is at the front of the engine, cross-reference page 5 instead: the Gear Housing gearcase cover seal is cataloged separately from the sump seal.
Manual Section: Flywheel Housing & Oil SumpParts ordered for wrong engine variant because the base engine family has multiple suffix configurations p. 4
Verify the full engine suffix before ordering any components. This catalog covers one specific variant; other suffix versions share the same base but use different part numbers for overlapping assemblies. Pull the block assembly part number from the Cylinder Block diagram on page 4 to confirm fitment. Gasket sets on pages 18-21 are especially suffix-sensitive and require serial number cross-reference.
Manual Section: Cylinder BlockFrequently Asked Questions
What are the replacement specifications for cylinder head gasket?
The replacement specification for the cylinder head gasket is part number 129903-01350. This part is listed with a quantity of 1 in the manual.
What are the replacement specifications for injectors?
The replacement specification for the injection valve assembly is part number 129931-53000, with a quantity of 4. The nozzle assembly, a component of the injection valve, has part number 119717-53010, also with a quantity of 4.
How do you fix yanmar 4TNE98-BQFLC cylinder head gasket part number unclear across multiple gasket set catalog pages?
Turn to the Gasket Set index on page 20, which organizes head gaskets, valve stem seals, and O-rings by assembly. Match your cylinder head assembly number from page 7 to the corresponding gasket set entry. Pages 18-21 cover the complete sealing catalog; cross-reference all four pages before ordering to avoid missing companion seals.
How do you fix starter motor fails to engage, need armature, pinion, or brush replacement part numbers?
Open the Starting Motor exploded view on page 16. This is a 2.3KW starter; confirm your unit matches before sourcing components. The armature assembly, ball bearings, brush set, and magnetic switch assembly are each listed as separate line items. Identify the failed subcomponent before ordering to avoid returning incompatible parts.
What do I get after purchasing this Yanmar 4TNE98-BQFLC manual?
Immediate download of the complete 21-page searchable Parts Catalog. Access it on any device, from a laptop at your desk to a phone in the field.
Am I able to print pages from this manual?
The PDF is DRM-free. Print whatever sections you need to take out to the shop. Standard letter or A4 paper works.
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