Part of the Yanmar Parts Manuals.
Need the factory part numbers for your Yanmar 4TNV94L-NHZ or 4JH-DT engine family? This 22-page parts catalog (OEM #Y00W0720) covers the 4JH-DT, 4JH-DTZ, 4JH-DTZA, and 4JH-DTZY variants with exploded views and OEM part numbers for every major assembly. Inside: 16 systems from cylinder block through gasket set, including crankshaft and piston breakdowns, complete fuel injection pump and nozzle holder assemblies, governor internals, cooling water pump, and the starting motor and generator sections. Each exploded view gives you numbered callouts and direct part references so you can confirm fitment before you order. The oil sump drain plug is listed at M22 thread, the kind of detail that saves a wasted trip to the parts counter. No more squinting at worn stampings or guessing from a catalog number that doesn't match. Bookmarked by system; search any assembly name or part description and land directly on the right page.
What's Inside This Yanmar 4TNV94L-NHZ / 4JH-DT Series Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| Cylinder Block | 3 | Block Assy, Cylinder, Plug, Bush, Camshaft, Main Bearing Set, Bearing Assy, Thrust |
| Gear Housing | 4 | Housing Assy, Cover, G, Seal, Oil, Case, Gear, Pump Assy |
| Flywheel Housing & Oil Sump | 5 | Housing, Flywheel, GASKET.LIQUID, Sump Assy, Oil, Drain Plug, Seal Washer |
| Cylinder Head & Bonnet | 6-7 | Head Assy, Cylinder, Valve, Valve Spring, Rocker Arm, Bonnet Assy |
| Suction & Exhaust Manifold | 8 | Manifold, Air Intake, PACKING(INT.MANIFOLD, Exhaust, Gasket, Silencer, Heater, Air |
| Camshaft & Driving Gear | 9 | Camshaft Assy, Gear, Camshaft, Gear Assy, Idle, F.I.PUMP |
| Crankshaft & Piston | 10 | Crankshaft Comp, Gear, Crankshaft, Piston W/RING, Ring Set, Piston, Rod Assy, Connecting |
| Lub.Oil System | 11 | Dipstick, LUB.OIL, Filter, Pipe Assy, Lub. Oil, Switch, (0.5KG)L.O., Joint Bolt |
| Cooling Water System | 12 | Pump Assy, Water, Gasket, Cw-P, Pulley, V-Belt, Thermostat, Hose a Assy |
| Fuel Injection Pump | 13-14 | Pump Assy, F.INJECT, Piston, Damper Assy, Valve Assy, Dilevery, Timer Set |
| Governor | 15 | Packing, Case, Cover, Spring, Lever, Regulator |
| Fuel Injection Valve | 16 | Valve Assy, F.INJECT, Nozzle Assy, Holder Assy, Nozzle, Spring, Shim Pack |
| Fuel Line | 17 | Filter, Fuel Oil, Pipe Assy, Fuel, Protector, Fuel Pipe, Pump Assy, Fuel Feed |
| Starting Motor | 18 | Starter, Armature Assy, Coil Assy, Field, Pinion Assy, Clutch Assy, Switch Assy, Magnetic |
| Generator | 19 | Rotor Assy, Ball Bearing, Pulley, Bracket Assy, Rear, Ajuster, Belt |
| Gasket Set | 20-22 | Packing, Seal, Valve Stem, Protector, Nozzle, O-Ring, Flex Horn |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Oil Sump Drain Plug Thread Size | M22 | p. 5 |
| Plug size | 55 | p. 3 |
| Plug PT3/8 screw | PT3/8 | p. 3 |
| Main Bearing Undersize | 0.25 | p. 3 |
| Bearing type | #6205 | p. 4 |
| O-ring size | P20 | p. 4 |
| Drain Plug size | M22 | p. 5 |
Yanmar 4TNV94L-NHZ / 4JH-DT Series Common Problems This Manual Covers
Yanmar 4TNV94L-NHZ main bearing undersize part number unclear when crankshaft is machined to non-standard dimensions
Check the Cylinder Block parts list on page 3. Standard and undersize main bearing sets are listed as separate line items: the undersize option is designated US=0.25 for this engine. If crankshaft journals have been machined 0.25 mm undersize, order that specific variant, not the standard set. The parts list shows five bearings required per engine.
Manual Section: Cylinder Block p. 3Gear housing oil seal and O-ring part numbers missing from initial engine reseal parts order
Open the Gear Housing exploded view on page 4. The parts list identifies the oil seal, O-ring P20, and ball bearing #6205 as individual line items with separate part numbers. Cross-reference each against the Gasket Set index on pages 20-22 to confirm whether they are already bundled in the full engine gasket kit before ordering them separately.
Manual Section: Gear Housing p. 4Oil sump drain plug and seal washer part numbers needed after stripping the M22 drain plug threads
Locate the Flywheel Housing and Oil Sump exploded view on page 5. The drain plug carries an M22 thread designation and its own part number; the seal washer is a separate line item on the same page. If the flywheel housing gasket also needs replacement, the liquid gasket and housing components are listed as distinct entries in the same section.
Manual Section: Flywheel Housing & Oil Sump p. 5Fuel injection pump assembly part number hard to confirm when catalog shows multiple variants across this engine family
Turn to pages 13-14 for the Fuel Injection Pump exploded view. The pump assembly, timer set, piston, and delivery valve assemblies each carry separate item numbers. Check quantity columns across model variants: differing quantities indicate model-specific fitment. Hardware common to all 4JH variants, including M6x16 screws (page 1), should be verified and ordered separately.
Manual Section: Fuel Injection Pump p. 13Frequently Asked Questions
What are the replacement specifications for cylinder head gasket?
The manual identifies the cylinder head gasket with part number 129906-01340, listed as "GASKET, CYLINDER HEAD". This parts catalog does not provide further replacement specifications such as torque sequence, material, or thickness for installation. p. 3
What are the replacement specifications for starter?
The manual identifies the starter as "STARTER(2.3KW)" with part number 129900-77010, indicating a 2.3KW power rating. This parts catalog does not provide other replacement specifications, such as installation procedures or torque values. p. 18
How will I receive this Yanmar 4TNV94L-NHZ Parts Catalog?
You get a 22-page searchable PDF (1 MB) that downloads instantly after checkout. Open it on your laptop, tablet, or phone, and bring it right to the shop floor.
Can I print specific sections of this Yanmar 4TNV94L-NHZ Parts Catalog?
Absolutely. No DRM or copy protection. Print the whole manual or just the pages you need. Any home or office printer works.
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