Lombardini issued document 1-5302-467 as the factory shop manual for its 15 LD diesel engine series, and this 74-page Lombardini 15 LD 350 shop manual PDF is that book, covering five variants from the 225 to the 440. Disassembly and reassembly fill about a third of the book, walking you through valve guide insertion, ring end gap, crankshaft endplay, and camshaft and balancer timing. The fuel chapter follows the injection pump from plunger to static flywheel timing and injector calibration; the electrical chapter carries 12V ignition wiring diagrams, alternator recharging curves and starter motor data. Set the antireverse weight clearance to 1 mm on the 400 and 440, then take the cylinder head through all five phases, starting at 30 Nm with a 180° back-off and a 52° turn to follow. Nobody torques an angle-sequence head from memory. Bookmarked and text-searchable, the PDF keeps every clearance in reach at your bench until the engine is reassembled and running.
What's Inside This Manual
| System | Pages | Key Topics |
|---|
| Troubleshooting | 7 | Fuel Circuit, Lubrication, Settings, Repairs |
| Safety Decals - Safety Instructions | 8-10 | Safety and Warning Decals, Safety Instructions |
| Model Number and Identification | 11 | Model Number, Engine Identification |
| Technical Data | 12-13 | Characteristics 15 LD 225, Characteristics 15 LD 315, Characteristics 15 LD 350, Characteristics 15 LD 400, Characteristics 15 LD 440 |
| Overall Dimensions | 16-17 | Ld 225, Ld 315, Ld 350, Ld 400, Ld 440 |
| Maintenance - Recommended Oil Type - Refilling | 18-19 | Maintenance, Fuel, Recommended Oil, Oil Supply, Acea Sequences |
| Disassembly / Reassembly | 20-45 | Automatic Decompression, Availability of Bearings, Cam Height, Camshaft, Camshaft - Antireverse System, Camshaft End Play, Camshaft Journals and Bore, Camshaft Timing |
| Lubrication System | 46-50 | LD 225 - 315 - 350 Lubrication System, LD 400-440 Lubrication System, Calibrated, Internal Strainer, Oil Filter, Oil Pressure Check, Oil Pressure Curve at Full Speed |
| Fuel System | 51-60 | Feed Pump, Fuel Filter 15 LD 225-315-350-400-440, Fuel Filter 15LD 225, Fuel Pump, Drive Rod Protrusion, Fuelling/Injection Circuit for 15 LD 315-350-400-440 |
| Electrical System | 61-66 | 12V Electric Ignition Layout with Motor Protection, 12V Electric Starter Diagram with Voltage Regulator Built Into the Ignition Panel, 12V, 12A Electric Ignition Diagram |
| Settings Adjustements | 67-69 | Adjustments - 15 LD 315-350, Adjustments - 15 LD 225, Full Speed Setting in No-Load Conditions, Idle Speed Adjustment, For Small Car Versions |
| Storage | 70 | Temporary Protection, Permanent Protection, How to Prepare the Engine for Operation |
| Torque Specifications | 71-74 | Standard Bolt Torque Specifications |
Quick Reference Specifications
| Specification | Value | Page |
|---|
| All Models |
| Cylinder head bolt torque | 1st phase: 30 Nm, 2nd phase: unscrew 180°, 3rd phase: 20 Nm, 4th phase: 52° turn, 5th phase: 10 Nm | p. 27 |
| Feed pump screw torque | 15 Nm | p. 52 |
| Fuel filter 15 LD 225-315-350-400-440 filtering area | ≥ 390 cm² | p. 52 |
| Fuel filter 15 LD 225-315-350-400-440 filtration level | ≤ 7 µm | p. 52 |
| Feed pump delivery | 40 l/h | p. 52 |
| Drive rod protrusion | 1.5-1.9 mm | p. 53 |
| Distance from flywheel rim surface to starter motor flange surface | 17.5-19.5 mm | p. 65 |
| 15 LD 400-440 |
| Camshaft gear cover tightening torque | 25 Nm | p. 41 |
| Clearance between weight A and surface B | 1 mm | p. 40 |
| 15 LD 225 |
| Standard oil sump capacity (filter included) | 0.9L | p. 19 |
| 15 LD 315, 15 LD 350 |
| Standard oil sump capacity (filter included) | 1.2L | p. 19 |
| 15 LD 400, 15 LD 440 |
| Standard oil sump capacity (filter included) | 1.5L | p. 19 |
