Kobelco SK70SR-2 Excavator Shop Manual S5YT0015E01 – Complete Service & Repair Guide PDF

Description

Kobelco SK70SR-2 Shop Manual – Book Code S5YT0015E01

This Kobelco SK70SR-2 shop manual is the complete service and repair documentation for the SK70SR-2 hydraulic excavator, issued by Kobelco Construction Machinery Co., Ltd. as book code S5YT0015E01, First Edition, October 2010, for the Australian market, applicable from serial number YT06-18444 onward. Across 946 pages it brings together the specifications, maintenance standards, system descriptions, disassembly procedures, troubleshooting charts and engine service data that a technician needs to keep this 7.7-tonne class machine working.

File Details

• Manual type: Shop Manual (Service, Repair & Maintenance)
• Brand: Kobelco (Kobelco Construction Machinery Co., Ltd.)
• Model covered: SK70SR-2 hydraulic excavator
• Book code: S5YT0015E01
• Edition: First Edition, October 2010 (AUS)
• Applicable serial range: YT06-18444~
• Engine covered: ISUZU AU-4LE2X
• Language: English
• Page count: 946
• File format: PDF

Chapters Covered

The SK70SR-2 shop manual is organised into seven top-level sections, each building on the last.

• 1. Specifications
• 2. Maintenance
• 3. System
• 4. Disassembly
• 5. Troubleshooting
• 6. Engine
• 7. Procedure of Installing Options

1. Specifications

Machine outline, general dimensions, weight of components table, transportation dimensions, specifications and performance (speed, climbing capability, engine ratings, hydraulic components, weight), crawler and bucket type tables, attachment combination matrix, and full engine specifications for the ISUZU AU-4LE2X including the engine characteristic curve. Attachment dimensions for the boom, arm, bucket and dozer are drawn with their maintenance standards.

2. Maintenance

Three chapters. Tools covers tightening torques for capscrews, nuts, hose and fitting joints and plugs, plus special spanners, special tools, screw-locking and sealing compound application, the suction stopper, counterweight lifting jig, boom foot pin pulling tools, trunnion cylinder pin pulling tools, upper frame lifting jig, engine mounting pedestal and track spring set jig. Standard Maintenance Time Schedule gives the standard working time tables for attachment, cab and guard, swing frame, travel system, electric equipment and engine maintenance service. Maintenance Standard and Test Procedure covers the performance inspection standard table, engine speed measurement, hydraulic pressure measurement, relief valve adjustment, travel and swing performance measurement, attachment operating performance, swing bearing performance, and mechatro controller output adjustment.

3. System

Five chapters explaining how the SK70SR-2 works. Mechatro Controller (multi-display, self-diagnosis, service diagnosis, trouble history, maintenance schedule setting, display adjustment, controller connectors). Hydraulic System (component circuits, standard and offset specifications, breaker and hand-control breaker specifications, and circuit operation for neutral, travel, bucket, boom, swing, arm, dozer and combined circuits). Electric System (wiring diagrams, electrical equipment and harness lists, harness routing). Components System (hydraulic pump and regulator, control valve, pilot valves, swing motor unit, travel motor, swivel joint, cylinders, and the electrical equipment list with part numbers). Air-Conditioner System (air cycle, components, piping, cooling circuit, disassembly and assembly, refrigerant charging, electric circuit, troubleshooting, self-diagnosis).

4. Disassembly

Four chapters taking the machine apart and putting it back together. Disassembling & Assembling is the general chapter. Attachment covers removing and installing the bucket, arm, boom and dozer, plus cylinder disassembly and assembly. Upper Structure covers the operator seat, cab, battery, guard, under cover, fuel tank, hydraulic tank, hydraulic pump, air cleaner, muffler, counterweight, radiator and oil cooler, engine, console cover, control valve, pilot valves, swing motor unit, swivel joint and upper frame, with pump-regulator, control valve, pilot valve, swing motor unit and swivel joint disassembly. Travel System covers the crawler, upper roller, lower roller, front idler and idler adjuster, sprocket, travel motor and swing bearing, with travel motor disassembly.

5. Troubleshooting

Two chapters. Troubleshooting by Error Codes covers site judgment, classification of failures, the blown fuse of the mechatro controller, and code-by-code tables for A, B, C, F, G, H, I, K, R and other mechatro error codes with judging conditions, symptoms, fail-safe control behaviour, return-to-normal conditions, service diagnosis screens and checking procedures. Troubleshooting by Trouble covers hydraulic system symptoms (slow or dead functions, engine stall, drift, poor fine operability, swing noise, travel deviation, two-speed failure, boom swing issues), electric system checks with the wiring checking procedure, and engine-related troubleshooting.

6. Engine

Service information for the ISUZU AU-4LE2X industrial diesel engine, adapted from the ISUZU Motors service manual. Covers general information, service precautions, reading the model, recommended lubricants, trouble symptom lists, repair standards, and the mechanical, cooling, fuel, electrical, exhaust, lubrication, intake and preheating systems with component removal, disassembly, inspection, reassembly and torque specifications.

7. Procedure of Installing Options

The final section covers procedures for installing optional attachments and equipment on the machine.

What This SK70SR-2 Shop Manual Lets You Do

With the SK70SR-2 shop manual on the bench, an experienced technician can diagnose machine faults from the display error code list and follow each code’s checking procedure to the failing sensor, solenoid, wiring run or controller. The hydraulic circuit can be traced through every operating mode – neutral, travel, boom, arm, bucket, swing, dozer and combined operations – using the colour-coded circuit diagrams. Hydraulic pressures, relief valves, engine speed, travel speed, swing performance, swing bearing play, cylinder operating times and drift limits can all be measured and adjusted against the book’s standard, repair-reference and service-limit values. The attachment, upper structure and travel system can be removed and reinstalled following the exact slinging, blocking, pin-pulling and torque steps. The main hydraulic pump and regulator, control valve, pilot valves, swing motor unit, travel motor, swivel joint and cylinders can be overhauled with their illustrated construction and assembly jigs. The ISUZU AU-4LE2X engine and its cooling, fuel, electrical, exhaust, lubrication, intake and preheating systems can be serviced from the same volume.

Why Correct Procedures and Specs Matter

A 7.7-tonne mini excavator is not cheap to repair, and incorrect tightening torques, wrong shim selections, or a mis-set relief valve can cause expensive follow-on damage. The SK70SR-2 shop manual gives the exact figures and the exact procedures the machine was designed around: shim-adjusted clearances on bucket and boom pin joints, the warm-up condition for measuring pump pressures, the sensitivity of the relief valve adjustment, the correct order for releasing hydraulic pressure before breaking any line, the order for loosening cylinder head bolts, the temperature at which to press-fit bearings, and the mechatro controller’s A-adjustment sequence. It is the difference between a repair that holds and a repair that comes back.

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