JCB Isuzu A-4JG1 Diesel Engine Service Manual
225 pages · Publication A-4JG1
Added to your cart. View cart
- Models
- Isuzu A-4JG1 Diesel
- Manual type
- Service Manual
- Pages
- 225
- Publication
- A-4JG1
- Condition
- Brand new

What's inside
From the manual's own table of contents: 5 sections, 43 entries. See sample pages (PDF, 238 KB)
General13 topics
- GENERAL INFORMATION
- MAINTENANCE
- ENGINE ASSEMBLY (1)
- ENGINE ASSEMBLY (2)
- ENGINE ASSEMBLY (3)
- LUBRICATING SYSTEM
- COOLING SYSTEM
- FUEL SYSTEM
- ENGINE ELECTRICALS
- TROUBLESHOOTING
- SPECIAL TOOL LIST
- REPAIR STANDARDS
- CONVERSION TABLE
GENERAL INFORMATION3 topics
- Notes on the format of this manual
- Main data and specifications
- Tightening torque specifications
MAINTENANCE7 topics
- Model identification
- Injection pump identification
- Valve clearance adjustment
- Injection timing
- Compression pressure measurement
- Recommended lubricants
- Engine repair kit
LUBRICATING SYSTEM3 topics
- General description
- Oil pump
- Oil filter with built-in oil cooler
FUEL SYSTEM2 topics
- Injection nozzle
- Injection pump calibration data
TROUBLESHOOTING10 topics
- Hard starting
- Unstable idling
- Insufficient power
- Excessive fuel consumption
- Excessive oil consumption
- Overheating
- White exhaust smoke
- Dark exhaust smoke
- Oil pressure does not rise
- Abnormal engine noise
Inside this manual
Real pages from this service manual (225 pages). Open the sample pages (PDF, 238 KB)
- Diagram, page 153: ENGINE ELECTRICALS
- Troubleshooting, page 174: TROUBLESHOOTING
- Specifications, page 213: REPAIR STANDARDS
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, 225 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
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).