Komatsu SK12SR-3 Shop Manual S5PA0013E01

Description

• Model List:
  • SK12SR-3

• 1. Cover
• 2. CONTENTS
• 3. General Cautions for Maintenance Work
• 3.1. Correct Work
• 3.2. Safety Precautions
• 3.3. Preparations
• 3.4. Cautions for Disassembly and Reassembly
• 3.5. Cautions for Removal and Installation of Hydraulic Equipment
• 3.6. Cautions for Removal and Installation of Hydraulic Piping
• 3.7. Cautions for Handling Seals
• 3.8. Correct Installation of Hydraulic Hose
• 3.9. Specifications of Hydraulic Hose
• 3.10. Air Release of Hydraulic Equipment
• 4. Technical Data
• 4.1. Specifications
• 4.2. Outline Drawing and Working Area
• 4.3. Weight List of Main Parts
• 4.4. Lifting Capacity List
• 5. Service Standards
• 5.1. Machine Performance
• 5.2. Engine
• 5.3. Undercarriage
• 5.3.1. Rubber Crawler Specifications
• 5.4. Controls
• 5.5. Hydraulic Equipment
• 5.5.1. Hydraulic Cylinders
• 5.6. Implement
• 5.6.1. Front Attachments
• 5.6.2. Blade Moving Device
• 5.6.3. Bucket Teeth
• 5.7. List of Tightening Torque
• 5.7.1. Machine
• 5.7.2. Engine
• 5.7.3. Tightening Torque for General Bolts and Nuts
• 6. Engine
• 6.1. Exploded View (General layouts of major engine components)
• 6.2. Measurement, Inspection and Adjustment
• 6.2.1. Measuring the Compression Pressure
• 6.2.2. Adjusting the Valve Clearance
• 6.2.3. Checking the Vbelt Tension
• 6.2.4. Checking the Fuel Injection Valve
• 6.2.5. Checking and Adjusting Fuel Injection Timing
• 6.2.6. Adjusting the Maximum (or Minimum) Idling Speed
• 6.2.7. Checking the Cooling Water System and Radiator for Water Leakage
• 6.2.8. Checking the Sensors
• 6.3. Measurement Procedure, Service Data and Corrective Action
• 6.3.1. Cylinder Head
• 6.3.2. Cylinder Block
• 6.3.3. Valve Rocker Arm
• 6.3.4. Piston and Piston Rings
• 6.3.5. Connecting Rod
• 6.3.6. Cam shaft
• 6.3.7. Crank shaft
• 6.3.8. Gears
• 6.3.9. Trochoid Pump
• 6.4. Precautions for Reassembly
• 6.5. Electrical Equipment
• 6.5.1. Starter Motor
• 6.5.2. Alternator
• 7. Hydraulic System
• 7.1. Outline
• 7.1.1. Control Valve Operation
• 7.2. Hydraulic Circuit Schematic
• 7.3. Circuit Operation
• 7.3.1. Boom
• 7.3.3. Bucket
• 7.3.4. Swing
• 7.3.5. Boom Swing
• 7.3.6. Blade
• 7.3.7. Travel
• 7.3.8. Track Gauge Change
• 7.3.9. Simultaneous Operation of Travel and Blade
• 7.3.10. Simultaneous Operation of Boom Up and Bucket
• 7.3.11. Hydraulic P.T.O.
• 7.3.12. Safety Lock
• 7.4. Pressure Adjustment
• 7.4.1. System Relief Valves
• 7.4.2. Circuit Relief Valves
• 7.4.3. Swing Brake Valve
• 7.4.4. CutOff Valve
• 8. Hydraulic Equipment
• 8.1. Hydraulic Pump
• 8.2. Control Valve
• 8.3. Pilot Valve
• 8.4. Cutoff Valve
• 8.5. Swing Motor
• 8.6. Travel Motor
• 8.7. Solenoid Valve
• 9. Adjustment and Repair
• 9.1. Electrical Equipment and Engine of Machine
• 9.1.1. Parts Layout of Electrical Equipment
• 9.1.2. Monitor and Alarm Systems
• 9.1.3. Wiring Diagram
• 9.1.4. Circuit Description of Engine Start and Stop
• 9.1.5. Removal and Reinstallation of Engine
• 9.1.6. Removal and Reinstallation of Starter Motor
• 9.1.7. Removal and Reinstallation of Fuel Injection Pump
• 9.1.8. Removal and Reinstallation of Fuel Tank
• 9.1.9. Removal and Reinstallation of Radiator
• 9.2. Undercarriage
• 9.2.1. Outline
• 9.2.2. Points of Reassembly
• 9.2.3. Removal and Reinstallation of Crawler
• 9.2.4. Disassembly and Reassembly of Idler
• 9.2.5. Disassembly and Reassembly of Track Roller
• 9.2.6. Removal and Reinstallation of Track Gauge Change Cylinder
• 9.3. Controls
• 9.3.1. Control Train
• 9.3.2. Mechanical Control Linkage
• 9.3.3. Adjustment of Travel and Blade Levers
• 9.3.4. Adjustment of Boom Swing and P.T.O. Pedals and P.T.O. Pedal Lock
• 9.3.5. Lock Lever Switches
• 9.3.6. Adjustment of Travel Lever Lock
• 9.3.7. Adjustment of Accelerator Lever
• 9.4. Swing Bearing
• 9.4.1. Removal and Reinstallation of Swing Bearing
• 9.5. Hydraulic Equipment
• 9.5.1. Removal and Reinstallation of Hydraulic Oil Pump
• 9.5.2. Removal and Reinstallation of Control Valve
• 9.5.3. Removal and Reinstallation of Swing Motor
• 9.5.4. Removal and Reinstallation of Swivel Joint
• 9.5.5. Disassembly and Reassembly of Swivel Joint
• 9.5.6. Disassembly and Reassembly of Hydraulic Cylinders
• 9.5.7. Removal and Reinstallation of Boom Swing Cylinder
• 9.5.8. Removal and Reinstallation of Hydraulic Oil Tank
• 9.5.9. Piping Layout
• 9.6. Implement
• 9.6.1. Removal and Reinstallation of Implement
• 10. Periodic Inspection and Servicing
• 10.1. List of Periodic Inspection and Servicing
• 11. Fuel, Lube Oil and Grease Recommended
• 12. Troubleshooting
• 12.1. NonBreakdowns
• 12.1.1. Natural Release of Bucket
• 12.1.2. Discontinuous Arm Movement
• 12.1.3. Drifting of Upperstructure on Quick Travel Operation
• 12.1.4. Thermal Shock of Travel Motor
• 12.1.5. Change of Blade Speed in Loaded Condition
• 12.1.6. Time Lag on Travel Speed Switching
• 12.1.7. Fluctuation in Oil Level of Hydraulic Oil Tank Due to Temperature Change
• 12.2. Troubleshooting
• 12.2.1. Machine and Engine
• 12.2.2. Electrical Equipment on Panel
• 13. Reference Data
• 13.1. Specifications for Attachment