Hitachi S12A2 Engine Service Manual
352 pages · Publication KM-927E-04
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- Models
- S12A2
- Manual type
- Service Manual
- Pages
- 352
- Publication
- KM-927E-04
- Condition
- Brand new

What's inside
From the manual's own table of contents: 15 topics. See sample pages (PDF, 363 KB)
- Outline, Main specification, Tips on Disassembly and Reassembly
- Lubricants Table
- Special Tools
- Determination of Overhaul Timing、Testing the Compression Pressure
- Disassembly of crankcase, crankshaft, and main bearings
- Crankcase, Crankshaft, and Main Bearings
- Reassembly of Cylinder Heads and Valve Mechanisms
- Installing the fuel system
- Installing lubrication system
- Installing cooling system
- Removing inlet and exhaust systems
- Reinstallation of Electrical System
- Inspection procedure of dismounted engine
- Dissassembly and Reassembly of General parts
- Value List (for Reference)
Inside this manual
Real pages from this service manual (352 pages). Open the sample pages (PDF, 363 KB)
- Specifications, page 27: GENERAL
- Repair procedure, page 172: FUEL SYSTEM
- Diagram, page 327: ADJUSTING PROCEDURE OF ELECTRONIC GOVERNOR CONTROLS
- Color page, page 14: Caution About Warning Labels
- Color page, page 77: DISASSMBLY OF ENGINE MAIN PARTS
This is a service manual
Here's how it compares to the other manual types.
Service manual
Factory repair procedures and technical information such as specifications, troubleshooting, and wiring and hydraulic diagrams, for the models and systems the manual covers. See What's inside for its topics.
Operator's manual
Safe operation, controls, maintenance schedules, lubrication points, inspections, and basic checks. Repair procedures are in the service manual.
Parts manual
Illustrated diagrams with factory part numbers for identifying components and ordering parts. Repair procedures are in the service manual.
Engine service manuals are sometimes sold separately, since certain machine models were offered with more than one engine option.
What it's used for
Factory manual for in-house farm and construction shop use. Straightforward, complete, and easy to follow. It contains the OEM information dealership service departments and parts counters use to diagnose problems, identify components, and perform maintenance or repairs correctly.
Service shops and owner/operators who repair their own equipment
Identifying correct parts and seeing how assemblies come apart and go back together
Keeping equipment running with less downtime
Factory manual, 352 pages
Quantity one is the manual described above.
Fast free USA shipping
Ships in 1 business day.
60-day returns
Free if the mistake is ours. A manual ordered in error must come back unopened in its shrink-wrap; you pay return shipping and a 20% restocking fee applies. Return policy
Binder not included
Manuals over about 300 pages may need a standard 3-ring binder, which you can buy locally to keep the pages organized for shop use.
Questions about model, serial number, engine coverage or contents? Contact us before purchasing and we'll help confirm it's the right manual. Please verify the manual type, machine model, serial number range and engine coverage before purchasing: manuals ordered in error carry a 20% restocking fee (return policy).