Mitsubishi S6S-Y3 Series Diesel Engine Service Manual (P/N 99616-25000)

• Covers 2008 Mitsubishi S6S-Y3T61HF and S6S-Y3T62HF 6-cylinder diesel engines for heavy industry applications
• Original OEM publication P/N 99616-25000, dated August 2008 (204 pages)
• Includes 24 detailed exploded-view diagrams of engine sub-assemblies and 14 maintenance specification tables
• Covers removal and inspection of the water pump, thermostat, oil cooler, starter, alternator, glow plugs, magnetic valve, and turbocharger
• Outlines service procedures for the fuel injection pump, fuel filters, oil pump, idler gears, push rods, pistons, connecting rods, and main bearings

Engine System Contents

The Mitsubishi S6S-Y3 Series service manual documents the exact technical requirements for this 6-cylinder turbocharged diesel platform. Accessing this exact PDF documentation directly at your workbench prevents catastrophic engine failure; ensuring you assemble internal parts to precise factory clearance tolerances avoids premature wear and unnecessary parts replacement. It provides technicians with the essential engine overhaul, electrical, fuel system, and timing data required for daily workshop operations. Having these factory specifications on hand immediately reduces diagnostic time on heavy industrial machinery. The content details the complete disassembling, inspection, and reassembly processes for all internal systems. This includes the cylinder head, valve mechanism, flywheel, camshaft, and timing gear train. Working on heavy-duty diesel engines carries inherent risks of injury or equipment damage, so professional mechanics must always review these factory safety protocols and specifications before starting any maintenance work.

Technical Specifications and Component Data

Diagnostic sections help determine optimal engine overhaul timing by outlining compression pressure testing alongside fuel injection and lubrication system details. Mechanics can save costly outsourced labor by following the step-by-step procedures for adjusting fuel injection timing, bleeding the fuel system, measuring valve clearances, testing the magnetic switch, and measuring turbocharger axial clearance in-house. The documentation outlines the cooling layout and inlet/exhaust systems, featuring specific turbocharger data. To aid in visual routing and component testing, the manual provides specific fuel system flow diagrams, lubrication system flow diagrams, cooling system flow diagrams, inlet and exhaust system flow diagrams, tightening torque tables, and electrical testing circuit schematics. You will also find precise adjustment parameters, break-in procedures, and engine performance testing criteria.

This manual provides the technical data required for a successful repair job on the S6S-Y3 engine family. Component wear limits, clearance tolerances, and torque settings are clearly listed to support your engine rebuilds. Critical assembly data includes the cylinder head bolt torque values at 118 ± 5 Nm. Cold engines require an intake valve clearance of 0.25 mm. The oil pump discharge capacity is documented at 38.7 liters per minute. The standardized valve seat angle sits at 30 degrees. Main bearing cap torque requires 103 ± 5 Nm, and the crankpin outside diameter spans 57.955–57.970 mm. Electrical starter specifications are also provided, detailing a pinion shift output of 24V/5kW.