Shibaura N843-D, N843L-D and N844L-D Engine Manual

This Shibaura group includes three- and four-cylinder diesel engines. The book gives each version its own technical-data entry, allowing inspection results to be compared with the correct engine specification.

Wear checks compare a measured part with an assembly value and a repair limit. The supplied piston page illustrates where to inspect the skirt and pin bore, while the cylinder-block guidance addresses bore condition and distortion. These details help the reader understand what the inspection is intended to establish. The oil-flow drawing connects the filter, pump, relief valve and pressure switch within the lubrication circuit.

What’s Covered Inside

• Model data and specifications: Separate engine entries for dimensions, fuel equipment, cooling and lubrication data.
• Dismantling and component inspection: Illustrated examination of engine parts during disassembly and repair.
• Pistons and cylinder block: Wear-measurement locations, visible-damage checks and relevant service limits.
• Lubricating-oil circulation: A labelled flow diagram showing how the oil pump, filter and pressure-control components connect.
• Troubleshooting: A dedicated fault-finding section for engine service.
• Service-standard tables: Assembly values and repair limits used when assessing component condition.

Piston and cylinder-block inspection is most useful when each measurement is compared with the correct service limit. This engine reference brings those limits together with oil-circulation diagrams and troubleshooting information for the three named versions.