Need the right part number for a 1994-1998 4JB1 diesel in a TL126 or TL26 loader? This 59-page catalog has it. Every assembly gets its own exploded view with factory part numbers and dealer cross-references. Thirty-six pages of parts listings cover the cylinder head, crankshaft and piston assemblies, fuel injection system, injection pump internals, governor components, and engine electrical. Diagrams break each assembly down to individual gaskets, shims, and fasteners. Looking for the cylinder head gasket at T-1.65 mm thickness or the exact M11x122 head bolt? Every component is cataloged with its OEM number and dimensional callout. The 12V-2.2KW starter and 12V35A generator are listed with full breakdowns too. Bookmarked for quick navigation; pull it up on your phone at the parts counter, read off the number, and order with confidence.
What's Inside This Isuzu A-4JB1PAA10 Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| Engine Gasket Kit | 11 | Engine overhaul, cylinder head overhaul, gasket sets |
| Cylinder Head | 13 | Cylinder head assembly, valves, guides, seats |
| Crankshaft, Piston and Flywheel | 19-20 | Crankshaft, pistons, connecting rods, flywheel, damper |
| Fuel Injection System | 33-34 | Injection pump, nozzles, fuel pipes, shims, clamps |
| Engine Electrical Control Parts | 41-42 | Starter, generator, solenoids, switches, cables |
| Injection Pump | 45-46 | Pump housing, delivery valves, plungers, tappets, shims |
| Governor; Injection Pump | 47-48 | Governor assembly, flyweights, springs, levers, shims |
| Radiator Hose and Sub Tank | 54 | Surge tank, cap, switch, hoses |
Isuzu A-4JB1PAA10 Specifications
| Specification | Value | Page |
|---|---|---|
| GASKET: CYL HD Thickness | T-1.65 | p. 13 |
| BOLT: CYL HD TO BLOCK Size | M11X122 | p. 13 |
| PLUG; OIL GALLERY Thread | PT1/8 | p. 14 |
| STUD; CRANKCASE Size | M8X40 L=52 | p. 16 |
| PULLEY; CR/SHF DAMPER Grooves | 1-GROOVE | p. 20 |
| BOLT; COVER TO CASE Flange Size | M8X60 FLANGE | p. 22 |
| THERMOSTAT Opening Temperature | 82°C | p. 28 |
| BELT; COOLING FAN Length | L=1051 | p. 30 |
| STARTER ASM Voltage/Power | 12V-2.2KW | p. 42 |
| GENERATOR ASM Voltage/Current | 12V35A | p. 42 |
Isuzu A-4JB1PAA10 Common Problems This Manual Covers
Isuzu A-4JB1PAA10 timing gear worn, need correct replacement part number and related components p. 19
Locate the crankshaft and piston exploded view on page 19 for the timing gear and all associated drive components. Cross-reference each item against the parts number list to confirm fitment for your serial number range. The crankshaft damper pulley is a 1-groove design; verify this matches your current configuration before ordering.
Manual Section: Crankshaft, Piston and FlywheelCan't identify the correct fuel injector nozzle shims and seals for replacement p. 33
Open the fuel injection system exploded view on page 33 for the complete nozzle assembly breakdown, including individual shim thicknesses and seal part numbers. Each nozzle requires specific shims for proper adjustment. Match every component against the parts list before ordering to avoid buying shims you don't need.
Manual Section: Fuel Injection SystemOil pump gears failing, need part numbers for complete oil pump rebuild kit p. 39
Reference the oil pump repair kit listing, which includes the pump gears, oil strainer gauze, and pump cover gasket. Verify each component against the exploded view to confirm you have every piece for a full rebuild. The oil gallery plugs use PT1/8 thread (page 14); confirm this size if replacing drain plugs at the same time.
Manual Section: Oil Pump and Oil StrainerCylinder head gasket set incomplete, unsure which gasket kit covers all needed parts p. 11
Review the engine gasket kit parts list on page 11, which separates the full engine overhaul set from the cylinder head overhaul set. The cylinder head gasket thickness is T-1.65 and head bolts are M11X122 (page 13). Confirm your kit includes every item shown in the exploded view before starting teardown.
Manual Section: Engine Gasket KitRadiator cap, surge tank, and coolant hoses need replacement but can't match part numbers p. 54
Pull up the radiator hose and sub tank exploded view on page 54 for the complete cooling circuit breakdown, including the surge tank cap, temperature switch, and all hose assemblies. The thermostat opens at 82°C (page 28) and the cooling fan belt length is L=1051 (page 30); order these alongside hoses if they haven't been replaced recently.
Manual Section: Radiator Hose and Sub TankInjection pump tappet shims worn, need correct shim thicknesses and delivery valve parts p. 45
Turn to the injection pump exploded view on page 45 for the full tappet assembly, including all available shim thicknesses, delivery valve components, and camshaft bearings. Each tappet requires a specific shim for proper valve lift. Cross-reference part numbers with the governor assembly on page 47 if you are rebuilding the entire fuel delivery system.
Manual Section: Injection PumpIsuzu A-4JB1PAA10 parts FAQ
What do I get after purchasing this Isuzu A-4JB1PAA10 manual?
A 59-page searchable PDF, available for immediate download. Works on any device, so you can pull it up on your phone while working on the engine. No shipping, no waiting.
Can I print specific sections of this Isuzu A-4JB1PAA10 Parts Catalog?
No restrictions. The PDF is DRM-free, so print whatever sections you need to take out to the shop. Standard letter or A4 paper works fine.
Document Quality
This document is a scanned PDF, not a native digital file. An OCR layer is present, allowing you to search and copy the full text, though the text itself is not crisp like digital text.
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