This parts catalog covers the Isuzu 4JG1-TPA diesel engine fitted to the Takeuchi TL140 track loader. Its 77 pages break the engine into illustrated figures, from the gasket kit, cylinder head, and block through the camshaft, crankshaft, fuel injection system, injection pump and governor, cooling, and electrical parts.Each figure pairs an exploded diagram with item numbers, part numbers, and quantities, so you can identify the exact component before ordering. This is a mechanical injection-pump engine, and the catalog details the pump, governor, nozzles, and their shims down to individual thicknesses.Use it to build accurate parts lists for a rebuild, order the correct shims and gaskets, and match part numbers for this specific engine. It is a bilingual Japanese and English PDF you can download, search, zoom, and print whenever you service the engine.
What's Inside This Isuzu TL140 Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| Engine Gasket Kit | 8-9 | Gasket Sets, Engine Overhaul, Cylinder Head Overhaul |
| Cylinder Head | 10-11 | Assembly, Oil Filler, Valve Seats, Glow Plugs |
| Cylinder Block | 12-13 | Block Assembly, Cylinder Liners, Bearing Caps, Oil Pressure Switch |
| Camshaft & Valve | 16-17 | Camshaft, Valves, Rocker Arms, Push Rods, Tappets |
| Crankshaft, Piston & Flywheel | 18-19 | Crankshaft, Pistons, Connecting Rods, Flywheel, Piston Rings |
| Fuel Injection System | 36-37 | Injection Pump, Nozzles, Fuel Pipes, Shims |
| Oil Cooler & Oil Filter | 42-43 | Oil Cooler, Oil Filter, Elements, Hoses, Gaskets |
| Electrical Control Parts | 48-49 | Starter, Generator, Solenoids, Switches, Hangers |
| Injection Pump | 54-56 | Pump Housing, Plungers, Tappets, Shims, Delivery Valves |
| Governor; Injection Pump | 58-59 | Governor Assembly, Flyweights, Springs, Levers, Shims |
| Air Cleaner Assembly | 70-71 | Air Cleaner, Elements, Cover, Vacuator Valve |
| Radiator Assembly | 72-73 | Radiator, Cap |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Nozzle spring shim thickness | T=0.100 | p. 55 |
| Tappet shim thickness | T=0.30 | p. 55 |
| Rear bearing shim thickness | T=0.10 | p. 55 |
| Front bearing shim thickness | T=0.10 | p. 55 |
| Screw size | M6 x 16 mm | p. 1 |
| Tappet injection pump shim thickness | 0.65 mm | p. 56 |
| Rear sealing cup outer diameter | 38 mm OD | p. 13 |
| Water pump bolt size | M10 x 40 mm | p. 29 |
| Water pump stud size and length | M8 x 40 mm, L=52 mm | p. 29 |
| Housing to head bolt size | M8 x 16 mm | p. 31 |
| Cover bolt size | M8 x 40 mm | p. 21 |
| Housing bolt size | M12 x 25 mm | p. 21 |
Isuzu TL140 Common Problems This Manual Covers
Hard starting with oil on glow plugs
Owners report hard starting and low power with oil fouling the glow plugs, often from worn glow plugs or a compression issue. The Cylinder Head figure identifies the glow plugs, connectors, and head parts to inspect.
Manual Section: Cylinder Head p. 10Injection pump misfire and hesitation
A worn injection pump causes misfires, hesitation, and reduced power on the 4JG1. The Injection Pump figure breaks out the pump housing, plungers, tappets, shims, and delivery valves for service or replacement.
Manual Section: Injection Pump p. 54Nozzle faults and poor running
Clogged or worn nozzles cause rough running, smoke, and lost power. The Fuel Injection System figure lists the injection pump, nozzles, fuel pipes, and shims by number so you can order the right parts.
Manual Section: Fuel Injection System p. 36Engine knocking and rough running
Knocking can point to a cylinder not firing or worn lower-end components. The Cylinder Block figure identifies the block assembly, cylinder liners, bearing caps, and oil pressure switch for inspection.
Manual Section: Cylinder Block p. 12Engine overheating
Overheating usually traces to a cooling system fault or neglected maintenance. The Radiator Assembly figure covers the radiator and cap so you can identify and order the correct cooling parts.
Manual Section: Radiator Assembly p. 72Starter fails to crank
A worn or failed starter leaves the engine cranking slowly or not at all. The Electrical Control Parts figure breaks out the starter, generator, solenoids, and switches for ordering the right unit.
Manual Section: Electrical Control Parts p. 48Frequently Asked Questions
Which engine and machine does this cover?
It is the Isuzu parts catalog for the 4JG1-TPA diesel engine used in the Takeuchi TL140 track loader. Its 77 pages identify engine parts by figure, with item and part numbers for this specific engine.
Does it list the injection pump parts?
Yes. The Injection Pump figure breaks out the pump housing, plungers, tappets, delivery valves, and the shims with their individual thicknesses, each with part numbers for ordering. p. 54
Can I find fuel injection nozzle parts?
Yes. The Fuel Injection System figure covers the injection pump, nozzles, fuel pipes, and nozzle spring shims, listed by number so you can order the correct components. p. 36
How will I receive this Isuzu TL140 Parts Catalog?
Immediate download of the full 77-page searchable PDF. View it on any device: laptop at your desk or phone in the field.
Can I print specific sections of this Isuzu TL140 Parts Catalog?
Yes, print as many copies as needed with no restrictions. Many mechanics print individual sections to bring onto the shop floor.
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