2005 Komatsu S6D170-1, SA6D170-A-1, SA6D170-B-1, SA6D170AE-1, SA6D170BE-1 Diesel Engine Service Manual (P/N SEBE6161A16)

The 2005 Komatsu 6D170-1 Series shop manual, P/N SEBE6161A16, covers S6D170-1, SA6D170-A-1, SA6D170-B-1, SA6D170AE-1, and SA6D170BE-1 engines. The February 2005 publication documents engine configurations used in excavators, dozers, wheel loaders, dump trucks, generators, and marine applications.

This is a 489-page PDF with embedded navigation bookmarks. Most technical pages are scanned images, so text search is limited.

• Engine repair: Cylinder-head, valve-train, piston, liner, and crankshaft disassembly, inspection, and reassembly, with procedures for an engine mounted on a repair stand.

• Fuel injection: Injection-timing checks, nozzle-pressure testing, stop-system adjustment, pump calibration tables, and information on mechanical and electronic governor configurations.

• Fault diagnosis: Symptom-based troubleshooting for starting problems, low power, abnormal smoke, oil-pressure faults, overheating, and vibration, supported by compression tests and performance standards.

• Lubrication and cooling: Oil-pump and oil-cooler construction, piston cooling, water-pump and fan-drive assembly, thermostat data, and fan-belt adjustment procedures.

• Electrical systems: Starting and charging components, stop-solenoid and stop-motor circuits, generator wiring diagrams, and ZEXEL electronic-governor diagnosis.

• Component reconditioning: Cylinder-head pressure testing, valve-seat and guide replacement, liner-counterbore machining, crankshaft regrinding, and component wear limits.

Written for service technicians working in a repair workshop, this manual includes jobs that require precision measuring instruments, lifting equipment, and dedicated test tools.

Engine Structure and Overhaul

The engine-body sections explain cylinder-head construction, valve-train operation, piston and liner arrangements, and main-bearing support. General Assembly Drawings and Timing Gear diagrams connect the component layouts with the disassembly and assembly procedures.

The overhaul sequence uses a stand-mounted SA6D170-1 as its reference configuration. Separate details address aluminum and FCD cast-iron pistons, while inspection sections cover crankshaft journals, connecting-rod alignment, cylinder liners, and bearing clearances.

Repair coverage extends to nozzle-holder sleeves, cylinder-block resurfacing, main-bearing-cap replacement, and flywheel ring gears. The tool lists identify engine repair stand 790-501-2000 and cylinder-liner puller 795-102-1300; general and component-specific tightening data accompany the work.

Injection Pumps and Application-Specific Data

Specification tables and Engine Performance Curves document horsepower, torque, and fuel-consumption characteristics for different installations. Pump calibration tables identify machine applications, engine serial ranges, and pump assembly numbers, helping technicians select the applicable test data before calibration.

Timing procedures distinguish a reinstalled, unrepaired pump from a repaired or replacement pump, with separate details for flange and laminated couplings. The Fuel System Chart supports the descriptions of injection-pump delivery, governor operation, and nozzle testing.

The stop-solenoid adjustment section explains how incorrect linkage clearance can burn out the solenoid coil or damage the injection-pump governor.

Turbochargers, Lubrication, and Cooling

Turbocharger sections distinguish Komatsu KTR110, KTR130, KTR150, and Garrett TV77 arrangements. Their specification and maintenance-standard tables cover operating limits and inspection clearances.

The Lubrication System Chart traces oil distribution through the pump, filters, cooler, and piston-cooling circuit. Cooling-system material covers water-pump construction, thermostats, corrosion resistors, fan drives, and automatic belt tensioners, with separate aftercooler configurations where applicable.

Troubleshooting and Electrical Repair

Engine fault charts connect reported symptoms with likely causes and follow-up checks. They cover oil or coolant contamination and rising oil level as well as starting, running, temperature, and exhaust complaints.

ZEXEL governor troubleshooting adds controller indicator patterns, rack-sensor and actuator checks, and electrical test specifications. Dedicated wiring diagrams cover SA6D170-A-1 generator installations for EG550-1 and EG580B-1L; the reference pages also explain wire sizes and color codes for starting, lighting, and signal circuits.

This is the engine volume. Separate chassis, electrical, and attachment volumes remain necessary for repair work beyond its documented engine systems.

Technicians must depressurize fluid lines and allow heavy components to cool completely before service to prevent severe injury.

PDF Contents and Navigation

The total comprises 464 technical pages and 25 introductory/reference pages. Those 25 pages include the cover, contents page, three-page List of Revised Pages, and 20 pages of safety, foreword, torque, wire-code, and conversion information; they are already included in the total.

The PDF has 144 bookmarks spanning all six main sections. Searchable text is limited to six pages; most repair content must be located through the bookmarks or contents. Small wiring-diagram labels need enlargement for comfortable reading.