Part of the Yanmar Parts Manuals.
Yanmar built the L70N in a long list of application specs, and the AJ8T2AAWK suffix decides which crankshaft, governor spring, or fuel cock actually fits your engine. Publication 0CW10-M68200EN is the parts book for the L70N5AJ8T2AAWK, the vibrating machine specification of the air cooled L70N, with effective machine number notes and interchangeability marks that tell you whether a superseded number still fits your serial range.
When the engine is in pieces on the bench and nobody is left to ask, guessing at part numbers gets expensive. Eleven illustrated sections run from the cylinder block through the injection pump to the starting motor and dynamo, each with reference numbers, quantities, and factory part numbers, down to the 0.25 undersize main bearing and the 12V Hitachi starter.
The PDF is 17 pages and 0.6 MB. Print it, clip it above the bench, and let it collect fingerprints while you build the order list.
What's Inside This Yanmar L70N5AJ8T2AAWK, VIBRATING MACHINE Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| Reference Materials | 2-3 | Fuel Injection Pump, Fuel Injection Pump N, Camshaft, Roller Bearing, Retainer |
| Cylinder Block | 5 | Cylinder Block Assy, Head Gasket, Cover, Gasket, Crank Case Gasket, Cover Case, Main Bearing, Oil Inlet Pipe |
| Cylinder Head & Bonnet | 6 | Cylinder Head Assy, Valve Spring, Spring Retainer, Ring, Valve Stem Seal, Nozzle Protector, Nozzle Seat, Valve Cap |
| Air Cleaner & Muffler | 7 | Air Cleaner Assy, Air Cleaner Cover, Cleaner Assy, Element Assy, Locking Knob, Extension Assy, Air Cleaner Gasket, Muffler Gasket |
| Pre Cleaner | 8 | Pre Cleaner Assy, M5X16 Screws, Wing Bolt |
| Crankshaft, Piston & Camshaft | 9 | Tappet, Roller Tappet Assy, Push Rod Assy, Flywheel Assy, Ring Gear, Piston W/ Rings, Piston Ring Set, Ring |
| Lub.Oil Pump & Governor | 10 | Oil Pump Assy, Cover, Oil Filter Assy, Governor Lever Assy, Governor Assy, Governor Weight Assy, Needle Bearing, Oil Seal |
| Cooling & Starting Device | 11 | Decompression Label, Grommet, Collar, Seal Rubber, Top Cover Spacer, Cushion Rubber, Fan Case Seal, Recoil Starter Asy |
| F.I.Pump & F.I.Valve | 12 | Injection Pump Assy, Gasket, Plate, Plunger Spring, Delivery Valve Assy, Delivery Spring, Delivery Holder, Delivery Gasket |
| Fuel Tank & Fuel Pipe | 13 | 8X1 Gasket, Fuel Tank Cap Assy, Fuel Oil Filter, Fuel Tank Damper, Fuel Filter Assy, Fuel Tank Stay a, Fuel Tank Stay B, Fuel Cock Assy |
| Starting Motor & Dynamo | 14 | Starter 12V, Armature, Field Coil Assy, Rear Cover, Brush Holder Assy, Brush, Brush Spring, Gear Housing Assy |
| Tool, Label & Gasket Set | 15 | Air Cooled Label, Yanmar Label, Caution Label, Label How to Start-E, Diesel Label, Hot Surface Label, Thai Label, Gasket Set |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Bearing Undersize | 0.25 US | p. 5 |
| Key Dimension | 4X 12 | p. 9 |
| O-Ring Standard | 1AS22.4 | p. 10 |
| Starter Voltage | 12V | p. 14 |
| Dynamo Current | 15A | p. 14 |
| Fuse Rating | 20A | p. 14 |
Yanmar L70N5AJ8T2AAWK, VIBRATING MACHINE Common Problems This Manual Covers
Recoil starter rope frays and snaps
Pull starters on small diesels eat ropes, and age wears out the recoil mechanism itself. The Cooling & Starting Device section lists the rope, the complete recoil starter assembly, and the cooling fan and shroud that come off with it.
Manual Section: 7.Cooling & Starting Device p. 11Air cleaner element choked with dust
A plugged element starves the engine, showing up as fading power and dirty exhaust under load. The catalog lists the air cleaner assembly and filter element, along with the muffler and exhaust pipe you will disturb getting to them.
Manual Section: 3.Air Cleaner & Muffler p. 7Fuel starvation from a dirty tank
Stale diesel leaves varnish and sediment that plug the fuel oil filter and gum up the cock, causing surging or a refusal to start. The Fuel Tank & Fuel Pipe section lists the tank assembly, tank cap, filter, and fuel cock so you can renew the whole supply side at once.
Manual Section: 9.Fuel Tank & Fuel Pipe p. 13Surging idle and governor hunting
A tired regulator spring or worn governor linkage lets the engine hunt instead of holding steady speed. The Lub.Oil Pump & Governor section carries the governor assembly, flyweight, and regulator spring, plus the oil pump that shares the same page.
Manual Section: 6.Lub.Oil Pump & Governor p. 10Knock, smoke, and hard starting
Worn injection pump internals and a leaking delivery valve show up as hard starting, knock, and dirty exhaust. The F.I.Pump & F.I.Valve section breaks the injection pump assembly, delivery valve, and injection valve holder into orderable pieces.
Manual Section: 8.F.I.Pump & F.I.Valve p. 12Starter clicks but will not crank
On electric start engines a sticking magnetic switch or worn pinion is the usual culprit, with brush and armature wear behind it. The Starting Motor & Dynamo section lists the 12V Hitachi starter down to the armature, field coil assembly, magnetic switch, and pinion, plus the dynamo if charging has quit.
Manual Section: 10.Starting Motor & Dynamo p. 14Low compression after hard hours
Worn rings bleed compression until the engine will not light off cold. Piston rings, the connecting rod, and the crankshaft assembly sit in the Crankshaft, Piston & Camshaft section, with the cylinder liner and 0.25 undersize main bearing listed under Cylinder Block.
Manual Section: 5.Crankshaft, Piston & Camshaft p. 9Frequently Asked Questions
Will this catalog match my engine's serial number?
It covers the Yanmar L70N5AJ8T2AAWK, the vibrating machine specification, under publication 0CW10-M68200EN. The Reference Materials pages explain the effective machine number and interchangeability marks, so you can confirm a listed part applies to your serial range before ordering. p. 2
Is this a service manual with torque specs and clearances?
No. It is a factory parts catalog: illustrated listings with reference numbers, part numbers, and quantities for every system from cylinder block to gasket set. Use it to identify and order the right parts; rebuild procedures and clearance tables are the job of a service manual, not this book.
Does it cover the electric starter and charging parts?
Yes. The Starting Motor & Dynamo section lists the 12V Hitachi starter with its armature, field coil assembly, magnetic switch, and pinion, plus the dynamo assembly and the 20A fuse. p. 14
How do I get the file after purchase?
You download it right after checkout. The file is a 0.6 MB English-language PDF, small enough to save to a phone, tablet, or shop computer, and it is yours to keep with no subscription.
What format is this manual in?
A 17-page Parts Catalog in searchable PDF format, available the moment you complete checkout. View on computer, tablet, or phone, with no shipping wait.
Can I print this manual?
Yes. The PDF has no DRM restrictions, so print any page or section you need for your shop. Works with any standard printer.
Reviews
There are no reviews yet.