Cummins QSK23 / Komatsu 170-3 Engine Troubleshooting Factory Service Repair Manual

Cummins QSK23 / Komatsu 170-3 Engine Troubleshooting Factory Service Repair Manual

Loaded with illustrations, instructions, photos, and diagrams, complete to service and repair your engine. 

Bulletin Number: 4021375

1453 Pages

This manual provides instructions for troubleshooting and repairing this engine in the chassis.

Component and assembly rebuild procedures are provided in the engine shop manual.

The manual is organized to guide a service technician through the logical steps of identifying

and correcting problems related to the engine.

This Troubleshooting and Repair Manual is intended to aid in determining the cause of

engine related problems and to provide recommended repair procedures.

The manual is divided into sections. Each section is equivalent to a group used in

Cummins’ filmcard system. Some sections contain Reference numbers and procedure

numbers. Reference numbers provide general information, specifications, diagrams,

and service tools where applicable. Procedure numbers are used to identify and

reference specific repair procedures for correcting the problem.

This manual does not contain fuel systems electronic troubleshooting. Use the

troubleshooting trees in this manual, if there are no electronic fault codes.

This manual is designed so the troubleshooting trees are used to locate the cause of an

engine problem. The troubleshooting trees then direct the user to the correct repair

procedure. The repair procedures within a section are in numerical order. However, the

repair steps within a given procedure are organized in the order the repair must be

performed regardless of the numerical order of the steps. The user must use the

contents pages or the index at the back of the manual to locate specific topics when not

using the troubleshooting trees.

This manual is the same as the manual used by workshops. Service Manual contains detailed instructions and step by step diagrams for all workshop procedures.

 Language: English 
Format: PDF

COMPATIBLE WITH ALL WINDOWS & MAC COMPUTERS 
(WINDOWS 11, WINDOWS 10, WINDOWS 8, ETC.) 

Windows/Mac/Tablet/Phone Friendly

• Engine Configuration: In-line 6-cylinder, 4-cycle, turbocharged and aftercooled.
• Displacement: 23.15 liters (1413 cubic inches).
• Bore x Stroke: 170 mm x 170 mm (6.69 in x 6.69 in).
• Horsepower Range: The engine provides power ratings from approximately 760 HP to 950 HP (567 kW to 708 kW), depending on the specific application and emissions certification.
• Fuel System: It utilizes the Cummins High-Pressure Injection (HPI) PT full authority electronic fuel system, which operates at high pressure for optimal combustion and fuel efficiency.
• Emissions: The QSK23 meets various global emissions standards, including US EPA Tier 2 and EU Stage IIIA, depending on the model year and configuration.
• Durability: The engine features a rugged one-piece cast-iron block, forged-steel crankshaft, and robust cylinder head designed for long life, with an expected life cycle of up to 20,000 hours before the first overhaul. 

• Komatsu PC1250 Excavator Series: The QSK23 engine is a primary power source for certain PC1250 models.
• Komatsu EX1200-6 Excavator: This model also uses the QSK23 engine. 

• Saa6d170e3 Diesel Engine – Qsk23-c For Komatsu Equipment: New engine assemblies are available from suppliers like Alibaba.com, with prices starting around $42,000 USD.
• Cummins QSK23/Komatsu 170-3 Engine Troubleshooting Service Repair Manual CD: Service manuals providing detailed repair and troubleshooting instructions are available on platforms like eBay.
• QSK23 Diesel Engine For Komatsu PC1250 & EX1200-6: New/OEM replacement engines can be purchased from specialist engineering suppliers.