New Holland E20.2SR, E22.2SR, E27.2SR mini excavator workshop manual

Table of Contents for NH-60413401 manual

• SAFETY PRECAUTIONS
  • GENERAL SAFETY INFORMATION
  • SAFETY PRECAUTIONS
• 1. OUTLINE
  • 1.1 GENERAL PRECAUTIONS FOR REPAIRS
  • 1.2 INTERNATIONAL UNIT CONVERSION SYSTEM (Based on MARKS' STANDARD HANDBOOK FOR MECHANICAL ENGINEERS)
  • Table 1-1
  • Table 1-2
  • Table 1-3
  • Table 1-4
  • Table 1-5
  • Table 1-6
• 2. SPECIFICATIONS
  • 2.1 COMPONENTS NAME
  • 2.2 MACHINE DIMENSIONS
  • 2.3 SPECIFICATIONS AND PERFORMANCE
  • 2.4 MACHINE & COMPONENTS WEIGHT (DRY)
  • 2.5 TRANSPORTATION
  • 2.6 TYPE OF CRAWLER SHOES
  • 2.7 TYPE OF BUCKET
  • 2.8 ENGINE SPECIFICATIONS
• 3. ATTACHMENT DIMENSIONS
  • 3.1 BOOM
  • Fig. 3-1 Boom Dimensional Drawings
  • Table 3-1
  • Fig. 3-2 Clearance of pin and bushing on boom section
  • Table 3-2
  • Table 3-3
  • Fig. 3-3 Clearance in thrust direction on boom section
  • Table 3-4
  • Table 3-5
  • Fig. 3-4 Dipper dimensional drawings
  • Table 3-6
  • Fig. 3-5 Clearance of pin and bushing on dipper section
  • Table 3-7
  • Table 3-8
  • Fig. 3-6 Clearance in thrust direction on dipper section
  • Table 3-9
  • Table 3-10
  • Fig. 3-7 Bucket dimensional drawings
  • Table 3-11
  • Fig. 3-8 Dimension of lug section
  • Table 3-12
  • Fig. 3-10 Dozer dimensional drawings
  • Table 3-14
  • Fig. 3-15 Dozer maintenance standards
  • Table 3-15
  • Table 3-17
  • Table 3-18
  • Fig. 3-12 Swing bracket dimensional drawings
  • Table 3-19
  • Fig. 3-13 Clearance of pin and bushing on swing portion
  • Table 3-20
  • Fig. 3-14 Clearance in thrust direction on swing portion
  • Table 3-21
• 11. TOOLS
  • 11.1 TORQUE SPECIFICATIONS FOR CAPSCREWS & NUTS
  • 11.2 SCREW AND TOOL SIZES
  • 11.3 TORQUE SPECIFICATIONS FOR JOINTS AND HOSES
  • 11.4 TORQUE SPECIFICATIONS FOR SLEEVE TYPE TUBE FITTINGS
  • 11.5 SPECIAL SPANNERS FOR TUBES
  • 11.6 APPLICATION OF SCREW LOCKING AND SEALING COMPOUNDS
  • 11.7 COUNTERWEIGHT LIFTING JIG
  • Fig. 11-1 Counterweight lifting jig
• 12. STANDARD MAINTENANCE TIME TABLE
  • PREFACE
  • 12.1 STANDARD WORKING TIME TABLE FOR THE MAINTENANCE OF EXCAVATOR
• 13. MAINTENANCE STANDARDS AND TEST PROCEDURES
  • 13.1 HOW TO USE MAINTENANCE STANDARDS AND PRECAUTIONS
  • 13.2 PERFORMANCE INSPECTION STANDARD TABLE
  • 13.3 MEASURING ENGINE SPEED
  • Fig. 13-1 Engine Speed measurement (The above figure shows concept)
  • WATER TEMP
  • Fig. 13-2 Accelerator wire adjustment
  • Fig. 13-3 Main hydraulic oil pressure measurement
  • Fig. 13-4 Main hydraulic oil pressure measurement
  • Fig. 13-5 Relief valve
  • Fig. 13-6 Relief valve (Slewing motor)
  • Fig. 13-7 Pilot oil pressure measurement
  • Fig. 13-8 Relief valve
• 22. HYDRAULIC SYSTEM
  • 22.1 SUMMARY
  • 22.2 HYDRAULIC CIRCUITS AND COMPONENT MODELS
  • 22.3 HYDRAULIC CIRCUIT OPERATION
  • 22.4 SCHEMATIC PIPING FOR HYDRAULIC SYSTEM
• 23. ELECTRICAL SYSTEM
  • 23.1 HOW TO READ CIRCUIT DIAGRAM AND HARNESS CONNECTION
  • 23.2 ELECTRICAL EQUIPMENT & HARNESS
  • Fig. 23-1 Upper Frame Portion (1/6)
  • Fig. 23-2 Upper Frame Portion (2/6)
  • Fig. 23-3 Upper Frame Portion (3/6)
  • Fig. 23-4 Upper Frame Portion (4/6)
  • Fig. 23-5 Upper Frame Portion (5/6)
  • Fig. 23-6 Upper Frame Portion (6/6)
  • Fig. 23-7 Engine Portion (1/3)
  • Fig. 23-8 Engine Portion (2/3)
  • Fig. 23-9 Engine Portion (3/3)
  • Fig. 23-11 Relay Unit Portion (2/2)
  • Fig. 23-12 Fuel Tank Portion (1/2)
  • Fig. 23-13 Fuel Tank Portion (2/2)
  • Fig. 23-13 Socket and Hour meter Assembly
  • Fig. 23-14 Cab Portion (OPT) (1/2)
• 24. COMPONENTS SYSTEM
• 24.1 HYDRAULIC COMPONENTS
  • 24.1.1 HYDRAULIC PUMP
  • 2. SPECIFICATIONS
  • 2. Operation
  • 2. Swash plate (Hanger)
  • 3. Rotary group
  • 4. Control spring
  • 5. Cover
  • 6. Gear pump
  • 7. Housing
  • 8. Trochoid pump
  • 2. Specifications
  • 3. Performance Characteristics
  • 2. Dumping mechanism
  • 2. Component Parts The control valve is roughly classified into the following four sections.
  • 2. Pilot operating section
  • 3. Manual operation section
  • 4. Flow conflux function
  • 5. Independent travel function
  • 6. Function of Lock Valve
  • 7. Operation of relief valve
  • 2. Parking brake
  • 3. The hydraulic timer is provided to protect the parking brake from dragging and plays to secure delay time so that the parking...
  • 4. Operating principle of relief valve
  • 5. Make-up valve (check valve, No.54)
  • 6. Reduction Unit (2-stage planetary)
  • 2. Hydraulic circuit
  • 2. Arm cylinder
  • 3. Bucket cylinder
  • 4. Swing cylinder
  • 5. Dozer cylinder
  • 2. Function of each Parts
• 24.2 ELECTRICAL EQUIPMENT
  • 24.2.1 ELECTRICAL EQUIPMENT LIST
  • 24.2.2 SPECIFICATIONS ELECTRICAL EQUIPMENT
• E20_22_27.2SR_2.pdf
  • 2. Crawler
  • 3. Upper roller (E27.2SR ONLY)
  • 4. Lower roller
  • 5. Front idler
  • 6. Idler adjuster
  • 7. Sprocket
  • 8. Travel motor
  • 9. Slewing bearing
  • B. Link height
  • C. Height of shoe lug
  • D. Bushing O.D.
  • E. Interference of bushing and link
  • F. Interference of track pin and link
  • G. Fitting of master pin and link
  • H. Clearence gap of link
  • I. Master pin
  • Slewing speed is slow.
  • Replace seal for pump shaft.
  • NO
  • Medium speed
  • OK
  • Not reach max. speed
  • Adjust engine speed
  • OK
  • 1. Diaphragm cover
  • 2. Spring
  • 3. Center plate
  • 4 Diaphragm
  • 5. Remove this side
  • 6. Bonnet
  • 7. Breather baffle
  • 8. Breather pipe
  • 9. Baffle plate
  • 10. Plug
  • 11. Suction manifold