Yanmar 12LAK-ST1 ST2 ST3 Diesel Engine Parts Catalog 0CG10-M24001EN PDF

Description

Yanmar 12LAK-ST1 ST2 ST3 Diesel Engine Parts Catalog

This is the illustrated parts catalog for the 12LAK-ST1, 12LAK-ST2 and 12LAK-ST3 Yanmar diesel engines, issued as a supplement edition under parts catalog number 000Y00G2401 and dated November 1996. The file carries the document reference 0CG10-M24001EN and runs 176 pages of exploded illustrations, itemised part lists and interchangeability tables. Every figure in this parts catalog is keyed to a numbered illustration, so a reference number on the drawing leads straight to the part number and description in the accompanying list.

If you are rebuilding, resealing or simply chasing a single bracket or gasket on a 12-litre Yanmar marine diesel, the value of a factory parts catalog is that it removes the guesswork. You look up the system, find the exploded view, read the reference number, and order the exact item rather than a near-match that will not fit.

File Details

• Manual type: Illustrated parts catalog (supplement edition)
• Brand: Yanmar
• Engines covered: 12LAK-ST1, 12LAK-ST2, 12LAK-ST3
• Document number: 0CG10-M24001EN (parts catalog No. 000Y00G2401)
• Date of issue: Nov., 1996
• Language: English (section headings also shown in Japanese)
• Page count: 176 pages
• File format: PDF

Chapters Covered

The catalog is organised into numbered figures, each covering one assembly or system. The figure list runs from cylinder block right through to the optional instruments and tools:

• Cylinder Block
• Gear Housing
• Lub. Oil Sump (Wet Type)
• Lub. Oil Sump (Deep Type) — Optional
• Lub. Oil Sump (Larboard) — Optional
• Cylinder Liner & Head Gasket
• O.F.W. Mounting
• Engine Bracket
• Side Cover and Cover (Optional)
• Breather
• Decompression
• Engine Lifter
• Label
• Lub. Oil Filler
• Cylinder Head
• Suc./Exh. Valve Rocker Arm
• Bonnet
• Suction Manifold
• Exhaust Manifold
• Exhaust Silenser (6B)
• Exhaust Pipe (Optional / 6B / 10B)
• Camshaft
• Idle Gear (S.F.W. and O.F.W.)
• Turbocharger (Previous and New)
• Air Cooler
• Air Duct (Inlet and Outlet)
• Exhaust Bend
• Exhaust Concentrated Pipe (Optional)
• Crankshaft
• Flywheel
• Direct Connection Part
• Piston & Connecting Rod
• Damper
• Front Joint (Optional)
• Cover and Joint (Optional)
• Lub. Oil Pump
• Safety Valve
• Lub. Oil Cooler
• Lub. Oil Press. Regulating Valve
• Check Valve
• Lub. Oil Dipstick
• Lub. Oil Strainer (standard and optional)
• Lub. Oil Centrifugal Filter
• Waste Oil Pump
• Lub. Oil Thermostat
• Lub. Oil Line (Pump-Cylinder, Out Side, Turbocharger)
• Lub. Oil Line-Spacer (Turbocharger)
• Piston Jet
• Lub. Oil Line (Centrifugal Filter / F.I.P. Pump)
• Lub. Oil Line Wing Pump and Wing Pump Joint (Optional)
• Lub. Oil Dry Scatter (Optional)
• Cooling Sea Water Pump
• Cooling Fresh Water Pump
• Cooling Fresh Water Cooler
• Sub Tank (3.4L and 9L)
• Bilge Pump (Optional)
• C.F.W. Thermostat
• Kingston Valve and Sea Water Strainer (Optional)
• Cooling Fresh Water Line
• Cooling Sea Water Line
• Cooling Water Line (Out-Ship, M332, M433 Optional)
• Watering Stern Pipe (Optional)
• Fuel Injection Pump
• Fuel Injection Valve
• Fuel Pump Driving Device
• Fuel Pump Mount
• Timer
• Fuel Strainer
• Oil/Water Separator (Optional)
• Fuel Line (standard and optional)
• Pipe, Fuel Return Line and Fuel Injection Line
• Link Device (RHD6)
• Boost Compensater
• Fuel Cut Off Device
• Hand Operation Stop Device (Optional)
• Governor (RHD6) and Governor Driving Device
• Governor Connecting Link, Control Device and Stop Lever
• Link Connecting Device and Remote Control Support
• Starting Motor
• Generator and Generator (2KW) — Optional
• Front Driving Device and Front Driving Shaft (Optional)
• Bracket (Optional)
• Wire Harness
• Battery Switch
• Clutch (Optional) and Clutch Bracket (M332)
• Joint (Rato)
• Remote Control Support-Clutch
• Instrument Panel (standard and optional)
• Press. Meter Pipe and Press. Meter Pipe (CL)
• Thermometer, Sensor and Switch
• Electric Speed Meter and Electric Tachometer
• Tool and Special Tool (Optional)
• Turbocharger Remove Part (Optional)
• Expansion Joint & Silenser (Optional)
• Gasket Set (Optional)

Beyond the individual figures, the front of the catalog carries a specification summary for the three engine ratings and a two-page user guide explaining how the catalog is structured. That guide matters more than it first appears: it defines the reference number system, the level column (main assembly, sub-component, sub-sub-component), and the interchangeability symbols that tell you whether a superseded part will still fit. Also explained is the effective machine number column, which uses letter codes for clutch, compressor, drive, engine, agricultural machine and machine numbers so you can confirm a part change actually applies to your serial range before ordering. The remarks column carries over-size part notes, part number corrections and other footnotes tied to the illustration.

Every figure is presented as a clean exploded drawing with ballooned reference numbers, followed by a tabulated list giving reference number, level, part number, description, quantity per model variant, and interchangeability indicator. The catalog’s own quantity columns are split across the model variants — (A)=12LAK-ST1,2, (B)=12LAK-ST3, (C)=12LAK-STE1,2, with further columns for optional configurations — so the same list tells you exactly how many of a part a given build needs.

The three engines share a common architecture in this catalog: vertical, water-cooled, four-cycle diesel, twelve cylinders of 150 mm bore by 165 mm stroke, direct injection, electric starting, fresh water (filtered sea water) cooling, and fully sealed forced-feed lubrication. Because they share so much hardware, one catalog covers all three, and the quantity columns are what keep the variants apart.

What This Parts Catalog Lets You Do

A parts catalog answers a different question from a workshop manual. It does not tell you how to set valve clearance or time an injection pump — the front matter states plainly that servicing technical data is not included. What it does is let you identify, order and verify components with certainty across the whole engine envelope.

That covers a lot of ground. You can work through the cylinder block and gear housing assemblies, match cylinder liners to the correct head gasket, and trace every fastener, plug, pin and bearing in the bottom end. You can rebuild the cylinder head with the correct intake and exhaust valves, valve springs, stem seals, rotators, cotters, guides and seats for your specific build. You can identify the piston and connecting rod assemblies including the correct ring set, piston pin, bush and crank metal, and check whether your engine has had a piston supersession applied.

The catalog is equally useful on the ancillaries, which is where marine diesels usually bite. Lubrication is covered in depth — oil pump, safety valve, cooler, pressure regulating valve, check valve, dipstick, strainers, centrifugal filter, waste oil pump, oil thermostat and every oil line from pump to cylinder, outboard, turbocharger, centrifugal filter, F.I.P. pump and wing pump. Cooling gets the same treatment: sea water pump, fresh water pump, fresh water cooler, sub tanks, C.F.W. thermostat, Kingston valve, sea water strainer, and the fresh water, sea water, out-ship, M332 and M433 line sets. Fuel is fully itemised from the injection pump and injection valve through the driving device, pump mount, timer, strainers, oil/water separator, return line, injection lines and the boost compensater.

Governor and control hardware is broken out separately — the RHD6 governor, its driving device, connecting link, control device, stop lever, link connecting device, remote control support, fuel cut-off device and optional hand operation stop device. Electrical and drive components are covered too: starting motor, generators including the 2KW option, front driving device and shaft, wire harnesses, battery switch, clutch and clutch bracket, and the instrument panel with its pressure meter pipes, thermometers, sensors and switches. Turbocharger coverage spans both the earlier and the new unit, plus the air cooler, inlet and outlet air ducts, exhaust bend, concentrated pipe and expansion joint and silenser.

Two smaller sections are easy to overlook but genuinely useful. The gasket set figure lists the individual gaskets that make up the set, so you can replace one item rather than buying the whole kit. The tool and special tool figures cover the nozzle remover, liner removers, piston insert tool, deflection gauge, spanner and wrench sizes, feeler gauges and the tool box contents.

Why the Correct Part Number Matters

Supersessions and model splits are the main reason a parts catalog beats a photograph and a guess. This document flags part changes with interchangeability symbols: a part may be interchangeable in one direction only, both directions, not at all, or only as part of a related group. It also notes quantity changes, newly added parts, discontinued parts, and part number corrections where an earlier printed number was wrong. For a twelve-litre engine where a wrong gasket or bearing can mean a coolant leak or a bottom-end failure, that information pays for itself the first time you use it.

The catalog also records effective machine numbers so you can confirm whether a revised part applies to your build. Where a date follows the symbol, that is the point from which the change took effect.

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Instant PDF Delivery

The catalog is supplied as a PDF that downloads immediately after payment. There is no shipping, no waiting for a disc, and no risk of a printed copy arriving damaged. Open it on a workshop laptop, a tablet on the engine room bench, or a phone, and print the pages you actually need — a single exploded view for a job, or the whole fuel section for a full pump overhaul. Keep it on file and you have the complete Yanmar 12LAK-ST1, 12LAK-ST2 and 12LAK-ST3 parts reference available every time you order components or verify what came off the engine.