MDI Yutani MD320B Shop Manual with Wiring Diagrams

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$39.99 USD · one-time payment

Model: MD320B
Type: Hydraulic Excavator
Serial: YC-0301~
454 Pages·28 MB·Searchable PDF·English·Print-Ready
  • ✓ Wiring Diagrams
  • ✓ Hydraulic Schematics
  • ✓ Torque Specs
  • ✓ Multi-Level Bookmarks (2-level navigation)
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MDI Yutani MD320B electric system wiring diagram showing controller, fuse box, switches, and color code table.
MDI Yutani MD320B Shop Manual with Wiring Diagrams
$39.99

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Written for the MDI Yutani MD320B hydraulic excavator, this 454-page shop manual (OEM ID S5YC0002E) is the factory book for that one model. Hydraulic schematics trace the travel, boom, arm, bucket and swing circuits through to the negative control signal circuit. Troubleshooting charts sort faults by drive, swing, travel, attachment and electrical system, and the undercarriage chapter takes you through track links, rollers, idler and track spring, and the sprocket. On the main hydraulic pump, run the Symbol A socketscrews to 46 ± 3.0 kgf·m (331.9 ft.lbs), then set the Symbol F capscrews at 7 ± 0.7 kgf·m with Loctite #242. A guessed torque is how pump mounts work loose. You can search the text or jump by bookmark, then print the pages your job calls for and let them take the grease at the bench.

What's Inside This Manual

SystemPagesKey Topics
Operation and Controls5-6Throttle Lever, Engine Stop Position, Low Idle Setting, Travel Control Lever, Pilot Valve Lever Stroke, Secondary Pressure
Specification7-22Names of Components, General Dimensions, Specifications and Performance
Location and Weight of Components23-28Location of Components, Weight of Components, Transportation Weight
Maintenance Standards and Test Procedures29-44Pressure Measurement and Adjustment, Cylinder Speed, Cylinder Oil-Tightness, Swing Performance, Travel Performance
Troubleshooting45-69Drive System, Hydraulic System, Swing System, Travel System, Attachment System, Electrical System
Tightening Torques for Capscrews and Nuts70-73Metric Coarse Screw Threads, Metric Fine Screw Threads, Nuts and Sleeves Tightening Torques
Systems Section Overview74-75Drive System, Hydraulic System, Swing System, Travel System, Attachments, Control System, Upper Frame, Electrical System
Drive System76-87Power Plant, Hydraulic Pump Removal and Installation, Coupling Removal and Installation, Engine Removal and Installation, Suction Stopper Detail
Hydraulic System88-106Hydraulic System Diagram, Travel Circuit, Boom Circuit, Arm Circuit, Bucket Digging, Swing Circuit, Negative Control Signal Circuit
Swing System107-116Swing System Operation, Swing Bearing, Swing Grease Bath, Swing Control Valve, Swing Motor, Swing Reduction Unit
Travel System117-149Lower Machinery Construction, Travel System Function, Track Link, Upper Roller, Lower Roller, Idler and Track Spring, Travel Reduction Unit, Sprocket
Attachments150-166Attachment System Functions, Backhoe Attachments, Bucket Removal and Installation, Arm Removal and Installation, Boom Removal and Installation, Pin and Bushing Clearance
Control System and Electrical System167-179Engine Control System, Travel Control System, Hydraulic Control System
Upper Frame180-194Fuel Tank, Removal and Installation of Counterweight, Removal and Installation of Cab
Electric System Diagram195-212Electrical System Diagram
Hydraulic Pump213-258Pump Control Curves, Pilot Valve
Control Valve259-330Main Relief Valve, Travel Relief Valve
Hydraulic Motor331-374Function of Brake Valve, Mounting Position of Changeover Valve
Swivel Joint375-388Thrust Plate, Slipper Ring, Square Ring
Hydraulic Cylinder389-408Tools and Jigs List
Reduction Unit409-441Planetary Shaft, Sun Gear, Pinion Shaft Assembly
Heavy Lift442-454Heavy Lift Modification

Quick Reference Specifications

SpecificationValuePage
O ring port tightening torque (Symbol A)10.0-12.0 kgf·m (72-86 lbs/in²)p. 176
O ring port tightening torque (Symbol B)7.0-8.0 kgf·m (50-57 lbs/in²)p. 176
Tightening torque of socketscrew (Symbol A)46 ± 3.0 kgf.m (331.9 ± 21.6 ft.lbs)p. 84
Tightening torque of socketscrew (Symbol C)44 ± 4 kgf.m (318.1 ± 28.9 ft.lbs)p. 84
Tightening torque of radiator upper frame mounting capscrew (Symbol E)15 kgf.m (108 ft.lbs)p. 85
Adjusting dimension of fan and radiator shroud (Symbol F)15 ± 5 mm (0.59 ± 0.20")p. 85
Socket bolt fastening swing control valve7 ± 0.7 kgf·m (50.5 ± 5.1 ft-lbs)p. 117
Socket bolts fastening swing motor and swing reduction unit55 ± 5.5 kgf·m (397.6 ± 39.7 ft-lbs)p. 117
For swivel joint fastening nut16 ± 2 kgf.m (115 ± 14 ft.lbs)p. 143
For reduction unit mounting capscrews55 ± 5.5 kgf.m (397 ± 40 ft.lbs)p. 143
Clearance between piston rod and rod bushing0.25 mm (0.0098 in)p. 405
Allowable bend of the rod1 mm/1 m (0.039 in/3'3")p. 405
BrandMdi Yutani
ModelMD320B
Machine TypeHydraulic Excavator
Manual TypeShop Manual
LanguageEnglish
FormatSearchable PDF (Digital Download)
Pages454
File Size28 MB
Manual No.S5YC0002E
Serial RangeYC-0301~
Wiring DiagramsYes
Hydraulic SchematicsYes
Torque SpecificationsYes
Bookmarked / IndexedYes
SKU: MDIYUTANI-MD320B-SHP-51F09 Categories: , Tags: , Brand:

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