Description

Lombardini 8LD600-2, 8LD665-2, 8LD665-2/L, 8LD740-2 1988 Workshop Manual

You got a Lombardini diesel in your shop that’s been sitting because the aftermarket manual gave you a head-bolt torque that was 10 Nm off? I’ve seen it. Stripped threads, blown head gaskets, and a customer who’s pissed because the repair didn’t last. That’s exactly why you need the Lombardini 8LD600-2, 8LD665-2, 8LD665-2/L, 8LD740-2 1988 Workshop Manual – 58 pages of factory data that came off the same line as the engine.

This is not a third-party rehash. It’s the OEM manual published in 1988 for the air-cooled, direct-injection diesels that power everything from generators to irrigation pumps. The Spanish-language original, direct from Lombardini. Every spec inside was validated before the engine left the factory. You want to know what happens when you guess on the main bearing clearance? Page 31 tells you the exact micrometers for the 8LD665-2 crankshaft journals. No guesswork.

Main Torque Specs and Fastener Data (Page 12)

Chapter VI (Pares de apriete) lists both standard bolt torques and the critical main torque values for cylinder head, flywheel, connecting rod, and main bearing cap bolts. The manual separates standard hardware torque from the specific values that matter. For example, the cylinder head bolts on the 8LD740-2 use a multi-step procedure – the table shows the sequence, the angle, and the final Nm. If you’re used to grabbing a generic chart off the internet, stop. Page 12 has the factory numbers. Write them on the bay wall.

Fuel Injection and Lubrication Circuits

The Circuito de alimentación/inyección section (pages 43–49) breaks down the injection pump, injectors, and the manual decompression aid. You’ll see the exact routing of the fuel lines and the spring-loaded plunger for cold-start enrichment. The Circuito de lubricacion (pages 39–42) shows oil flow paths, the gear pump assembly, and the pressure relief valve. If you’re rebuilding a seized engine, check the oil gallery restrictions against the diagrams – a clogged passage kills a rebuild fast.

Disassembly and Reassembly Sequence (Pages 15–38)

Chapter VII (Desmontaje/Montaje) is the meat. It covers everything from the cylinder head removal to the alignment of the connecting rod and bearing caps. The manual gives you the order for loosening and tightening the crankshaft pulley bolt – they list the tool required (a specific puller, not a pry bar). It also shows the correct orientation for the piston rings and the space between the ring gaps. If you’re swapping a cylinder on the 8LD600-2, the bore and piston dimensions are on page 20. Don’t trust a micrometer without verifying against the OEM tolerances.

Identifying Your Engine: Sigla e Identificacion (Page 5)

Before you order parts, confirm the exact model variant. The 8LD665-2 and 8LD665-2/L differ in the decompression mechanism and the manual start configuration. Page 5 has the engine identification code breakdown – you’ll find the serial number locations and what each digit means. Missing this step means you might order the wrong injector pump or timing gear set. Do not skip it.

When to Use the Anomalies Table (Page 9)

The Anomalias en el funcionamento section is a troubleshooting matrix. If the engine won’t start, runs smoky, or overheats, this table cross-references symptoms, causes, and corrective actions. It lists specific fuel system pressure checks and compression test values for the 8LD740-2. That’s the kind of diagnostic shortcut that saves you a day of hunting. For example, “engine lacks power” points to the injection timing or the air filter restriction – both have specific measurement procedures referenced back to Chapter VIII.

Related Manuals: Lombardini LDW 502, 602, 702, 903, 1003 2006 Workshop Manual – OEM Specs and Lombardini FOCS Series Workshop Manual. If you work on older agricultural tractors, see also Massey-Harris-Ferguson TEF20 1956 Workshop Manual – OEM Specs.

External reference: For an overview of diesel engine mechanical timing fundamentals, see the Manual Transmission page on Wikipedia – while not engine-specific, the clutch and flywheel relationships are relevant. Additionally, understanding gear mesh and backlash as described in the Manual Transmission article can help when setting up the timing gear train on these Lombardini engines.

FAQ

Is this manual in English?

No, this manual is in Spanish.

Does it include torque specs for all bolts?

Yes. Page 12 has a dedicated table for Pares de apriete principales (main torque values) covering cylinder head, connecting rod, main bearing cap, flywheel, and injection pump bolts. Additionally, there is a separate table for Pares de apriete bulones estandar (standard bolt torques) that gives values for metric hardware in various grades. The manual also instructs on the use of sealants and lubricants during assembly – those recommendations affect final torque readings, so follow them exactly. If you need a specific value for the fuel injector retaining nut, it’s listed under the injection circuit section on page 47. This manual does not leave you guessing.

This 58-page OEM workshop manual belongs on your bench next to the feeler gauges. You’re not going to find a cleaner source of factory-specified torque, clearance, and maintenance data for the 8LD600-2, 8LD665-2, 8LD665-2/L, or 8LD740-2. Access the Factory Manual now and keep the rebuilds correct.