Looking up a part number for your BB-4BG1-TRE engine, including builds in the Takeuchi TB1140? This 77-page catalog has you covered. Exploded views break down seven major systems, from cylinder block and oil pan assemblies through turbocharger, fuel injection, and electrical components like the starter, generator, and injection pump. Over 30 pages of engine parts diagrams pair cross-referenced part numbers with everything from cooling system water pumps (151mm pulley diameter) to accelerator pedal controls and fuel sedimenters. Need the right cylinder head bolt? M12 X 100. Inlet valve seat insert runs 47mm OD; exhaust side, 39mm. No more ordering the wrong part twice because you were working off a grainy forum photo. Bookmarked and searchable, pull this PDF up on your phone, walk to the engine, and match the part on screen to the part in your hand.
What's Inside This Isuzu BB-4BG1-TRE Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| Engine Mechanical | 6-23 | Engine Gasket Kit, Cylinder Head, Cylinder Block, Oil Pan & Level Gauge |
| Cooling System | 24-29 | Water Pump, Thermostat & Housing, Fan & Fan Belt |
| Turbocharger System | 30-33 | Turbocharger |
| Fuel and Air System | 34-39 | Fuel Injection System, Fuel Filter & Bracket, Fuel Pump & Pipe |
| Lubrication System | 40-45 | Oil Cooler & Oil Filter, Oil Pump & Oil Strainer, Oil & Vacuum Piping; Engine |
| Electrical System | 46-63 | Electrical Control Parts, Starter, Generator, Injection Pump |
| Control System | 64-73 | Accelerator Pedal and Control, Fuel Tank, Water Sedimenter; Fuel, Air Cleaner Asm |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| SHIM: TAPPET, INJ PUMP | T=0.30 | p. 53 |
| Fuel Injection Pump Screw Size | M6 X 16 | p. 1 |
| Cylinder Head to Block Bolt Size (Primary) | M12 X 100 | p. 9 |
| Inlet Valve Seat Insert Outer Diameter | 47mm | p. 9 |
| Exhaust Valve Seat Insert Outer Diameter | 39mm | p. 9 |
| Piston Cooling Oil Jet | 4 | p. 11 |
| Water Pump Pulley Diameter | 151mm | p. 25 |
| Thermostat Housing to Head Bolt Size | M10X40 | p. 27 |
| Breather Rubber Hose Clip Inner Diameter | 48mm | p. 23 |
| Injection Pump Camshaft Rear Bearing Shim Thickness | 0.10mm | p. 53 |
| Governor Flyweight Sleeve Shim Thickness | 0.20mm | p. 57 |
| Injection Pump Tappet Shim Thickness | 0.30mm | p. 53 |
Isuzu BB-4BG1-TRE Common Problems This Manual Covers
Isuzu BB-4BG1-TRE turbocharger replacement needed, can't identify correct complete turbo assembly part number p. 30
Open the turbocharger system exploded view starting on page 30. The turbo is listed as a complete assembly since the electric actuator motor is not sold separately. Cross-reference your engine serial number with the parts index to confirm the correct unit. Pages 30 through 33 cover all related gaskets, clamps, and mounting hardware needed for a full turbo swap.
Manual Section: Turbocharger SystemNeed correct fuel injector part numbers but unsure which injectors match this engine serial range p. 34
Locate the fuel injection system exploded view starting on page 34. Each injector and its associated seals, retaining hardware, and fuel lines are itemized individually. Verify the injection pump mounting screws are M6 x 16 as listed on page 1 to confirm you have the correct engine variant. Cross-reference all part numbers against the index for supersession or updated listings.
Manual Section: Fuel and Air SystemGlow plug replacement needed, can't locate part numbers or identify correct electrical connector components p. 46
Refer to the electrical control parts diagram on page 46 for glow plug locations and wiring harness connectors. The parts number list on page 47 identifies each glow plug, relay, and connector terminal individually.
Manual Section: Electrical SystemFuel starvation symptoms, need to find banjo bolt filter screen and lift pump component part numbers p. 38
Start with the Fuel Pump & Pipe diagram on page 38, then cross-reference the Fuel Filter & Bracket diagram on page 36. Banjo bolts, sealing washers, and feed pump components are itemized there. Water Sedimenter components appear in the Control System section on page 68.
Manual Section: Fuel and Air SystemInjection pump rebuild needed, can't identify internal shim and bearing part numbers p. 53
Pull up the injection pump parts number list on page 53 for all internal components. The camshaft rear bearing shim is 0.10mm thick and the tappet shim is 0.30mm; both carry individual part numbers on that page. The governor flyweight sleeve shim (0.20mm) is itemized on page 57. Order all three shim sizes together since selective fitting is required during reassembly.
Manual Section: Electrical SystemFrequently Asked Questions
What are the replacement specifications for the Turbocharger?
The complete turbocharger assembly part number is 18-97223-4280. Key related components: exhaust manifold gasket (P/N 18-94369-0230), turbine housing (P/N 897173-1310), and turbo cartridge (P/N 897233-3090).
What are the replacement specifications for Fuel injectors?
The fuel injector assembly is listed as "NOZZLE ASM; INJ" under part number 897222-1700. The injector nozzle tip is 115311-3010, and the nozzle holder assembly is 897134-8410.
Is this Isuzu BB-4BG1-TRE Parts Catalog a digital download?
Yes. It's a 77-page searchable PDF, available immediately after checkout. View it on a computer, tablet, or phone. No shipping wait.
Are there any print restrictions on this Isuzu BB-4BG1-TRE manual?
None. The PDF is DRM-free, so you can print whatever sections you need for the shop. Standard letter or A4 paper works fine.
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