All 49 pages of this Yanmar Parts Catalog (OEM #Y00B3752) focus on one thing: identifying and ordering the exact components for your 3TN84L-RBS, 3TN84L-RBSVM, and 3TN84L-RBFVM engines, including YB271/B configurations. Open it up and you get exploded-view diagrams with part numbers mapped to every assembly: cylinder block with main and thrust bearings, gear housing with oil seals and O-rings, crankshaft and flywheel assemblies, piston and connecting rod sets, and the full lubrication and cooling water systems down to the thermostat housing. Need to cross-reference a cooling water pump assembly or track down the V-belt (size A-38) for your fan drive? Every component is catalogued with its Yanmar part number so you order the right piece on the first call. No more guessing at part numbers from blurry microfiche scans. Bookmarked by system, searchable by keyword: pull it up on any device and find your part before your supplier puts you on hold.
What's Inside This Yanmar Yanmar 3TN84L-RBS Series Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| Cylinder Block | 3-4 | Block Assy, Cylinder, Plug, Main Bearing, Thrust Bearing, Camshaft Bush, Cyl. Head Stud, Head Gasket |
| Gear Housing | 5-6 | Housing Assy, Gear, Oil Seal, Flange, Gears Housing, Cover, Gasket, O-Ring |
| Flywheel Housing | 7-8 | Housing, Flywheel, Parallel Pin, Flywheel Cover Cap, Oil Seal Case Assy, Oil Seal, Oil Seal Case Gasket |
| Lub. Oil Sump | 9-10 | Sump Assy |
| Bonnet | 11-12 | - |
| Cylinder Head | 13-14 | - |
| Suction & Exhaust Manifold | 15-16 | - |
| Camshaft & Driving Gear | 17-18 | - |
| Crankshaft & Flywheel | 19-20 | Crankshaft Assy, Gear, Crankshaft, V-Pulley, Flywheel W/RING Gear |
| Piston & Connecting Rod | 21-22 | Piston W/RING, Ring Set, Piston, Pin, Rod Assy, Connecting, Bearing |
| Lub. Oil System | 23-24 | Pump Assy, Lub. Oil, Gasket, L.O. Pump, Dipstick, Pipe Assy, Oil Inlet |
| Lub. Oil Line | 25-26 | Bolt, Pipe Joint, Switch, Oil Pressure, Pipe Assy, Lub. Oil, Gasket |
| Cooling Water System | 27-28 | Pump Assy, C.WATER, Gasket, C.W. Pump, V-Belt, V-Pulley, Fan, Cooling |
| Thermostat | 29-49 | Cover, Gasket, Upper, Case Assy, Joint, Thermo. Case |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| V-Belt Size | A-38 | p. 26 |
Yanmar Yanmar 3TN84L-RBS Series Common Problems This Manual Covers
Yanmar 3TN84L water pump assembly part number unclear, pump listed as complete unit and individual sub-components p. 27
Open the Cooling Water System exploded view on page 27. The parts list separates Pump Assy C.WATER from individual sub-components including the gasket, V-belt, V-pulley, and cooling fan. Decide whether you need the full assembly or a specific piece, then verify the correct part number against the Parts Number List on page 2 for your serial number range.
Manual Section: Cooling Water SystemV-belt replacement part number needed, two different belt sizes listed and correct fitment is not obvious p. 27
Check the Cooling Water System diagram on page 27 and the parts list entry at page 26, which documents two verified belt sizes for this engine: A-38 and A-36. If the original belt is still on the engine, read the size stamped on the belt before ordering. Match that to the corresponding part number on page 2.
Manual Section: Cooling Water SystemCylinder head gasket part number needed, head is already removed and original gasket is not available for reference p. 13
Turn to the Cylinder Head exploded view on page 13. The head gasket is itemized as a separate line in the parts list for that section. Before ordering, cross-check against the Parts Number List on page 2 using your specific model variant (3TN84L-RBS, 3TN84L-RBSVM, or 3TN84L-RBFVM), as gasket part numbers can differ between variants.
Manual Section: Cylinder HeadGlow plug part number not found, electrical parts section is difficult to navigate across five engine variants p. 44
Navigate to the Electrical Parts section on page 44. Glow plugs and related electrical components are cataloged there with individual callout numbers on the exploded view. Cross-reference the callout against the Parts Number List on page 2 to pull the exact part number. Confirm your model variant first, since electrical component numbers differ between YB271/B and the 3TN84L inline series.
Manual Section: ThermostatFuel injector nozzle or fuel filter part number missing from main engine block sections of the catalog p. 34
Fuel system components are grouped separately from the engine block sections. Open the Fuel System Parts diagram on page 34. Injector nozzles, fuel filters, and fuel-water separator elements are listed there by callout number. Once you identify the correct callout on the exploded view, pull the full part number from the master Parts Number List on page 2.
Manual Section: ThermostatPiston ring set part number unclear, unsure whether to order standard or oversize when preparing for engine rebuild p. 21
Go to the Piston and Connecting Rod exploded view on page 21. The Ring Set is listed as a separate line item, distinct from the piston, pin, and rod assembly. Determine your bore condition before looking up the part number. Verify the correct standard or oversize variant against the Parts Number List on page 2 before placing the order.
Manual Section: Piston & Connecting RodFrequently Asked Questions
What are the replacement specifications for fuel filter?
The manual identifies the fuel filter element as part number 129100-55650, with a quantity of 1. This element is a component of the fuel strainer assembly.
How do you fix 3TN84L water pump assembly part number unclear, pump listed as complete unit and individual sub-components?
Open the Cooling Water System exploded view on page 27. The parts list separates Pump Assy C.WATER from individual sub-components including the gasket, V-belt, V-pulley, and cooling fan. Decide whether you need the full assembly or a specific piece, then verify the correct part number against the Parts Number List on page 2 for your serial number range.
How do you fix V-belt replacement part number needed, two different belt sizes listed and correct fitment is not obvious?
Check the Cooling Water System diagram on page 27 and the parts list entry at page 26, which documents two verified belt sizes for this engine: A-38 and A-36. If the original belt is still on the engine, read the size stamped on the belt before ordering. Match that to the corresponding part number on page 2.
How do you fix cylinder head gasket part number needed, head is already removed and original gasket is not available for reference?
Turn to the Cylinder Head exploded view on page 13. The head gasket is itemized as a separate line in the parts list for that section. Before ordering, cross-check against the Parts Number List on page 2 using your specific model variant (3TN84L-RBS), as gasket part numbers can differ between variants.
What do I get after purchasing this 3TN84L-RBS & variants manual?
Immediate download of the complete 49-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 3TN84L-RBS & variants manual?
The PDF is DRM-free. Print whatever sections you need to take out to the shop. Standard letter or A4 paper works.
Document Quality
This document is a mixed-format PDF, containing both searchable text pages and scanned image pages. You can search and copy text from the OCR-generated pages, while text on the image pages is not directly selectable. Text quality is crisp on the OCR pages and generally clear and readable on the scanned pages, though not as sharp as native digital text. All diagrams and illustrations are raster images; they are clear and their labels are readable, but they will pixelate when highly magnified. Pages are clean with no significant scan artifacts, stains, or skewed content, and there are no notable blank pages.
Reviews
There are no reviews yet.