Hitachi ZW550 Wheel Loader Operational Principle Technical Service Manual
526 pages · Publication TO11C5-E-00
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- Models
- ZW550
- Manual type
- Operational Principle Technical Service Manual
- Pages
- 526
- Publication
- TO11C5-E-00
- Condition
- Brand new
What's inside
From the manual's own table of contents: 58 sections, 338 entries. See sample pages (PDF, 496 KB)
General32 topics
- General Information
- How to Use Manual
- Safety precautions
- Symbols
- Outline
- Layout of main components
- Inspection and maintenance table
- Recommended lubricants
- Coolant
- Lubrication chart
- Weight of main components
- Bolt tightening torque
- Hose band tightening torque
- Liquid gasket and screw lock agent
- Cautions regarding welding repair service
- Measurement for Performance Check
- Cautions on Safety
- Standard Measurement Values for Performance Check
- Function & Structure Chassis Group
- Front Chassis
- Loading linkage
- Loading linkage pin
- Rear Chassis
- Fuel tank
- Floor board mount
- Center Pin
- Upper center pin
- Lower center pin
- Dust seal
- Check & Adjustment Chassis Group
- Linkage Pin
- Liner
Center Pin3 topics
- Adjusting shim
- Installing bearing cover
- Installing bearing outer ring
Function & Structure Power Group
Power Line
Engine / Transmission1 topic
- Engine / transmission mount
Radiator1 topic
- Radiator mount
Propeller Shaft3 topics
- First propeller shaft assembly
- Second propeller shaft assembly
- Third propeller shaft assembly
Axle Assembly
Axle Support
Differential Gear3 topics
- Conventional type
- Function of differential gear
- Operation of differential gear
Check & Adjustment Power Group
Engine5 topics
- Measuring engine speed
- Measuring engine oil pressure
- Propeller shaft phase
- Second propeller shaft alignment
- Propeller shaft tightening torque
Axle36 topics
- Axle nut tightening procedure
- Differential gear adjustment procedure
- Function & Structure Torque Converter and Transmission Group
- Torque Converter
- Torque converter structure
- Power flow path
- Torque multiplication
- Torque Converter (Lock-up) (Option)
- Lock-up clutch structure
- Lock-up clutch function (only forward)
- Torque Converter Gear Pump
- Gear pump specifications
- Transmission
- Clutch combination
- Planetary gear
- Shift lever position
- Downshift button operation
- Gear train and number of teeth
- Clutch Pack
- Power Flow Path in the Transmission
- Hydraulic System Diagram
- Hydraulic Circuit Diagram
- Oil Flow
- Oil flow in the torque converter line
- Oil flow in the transmission line
- T/C and T/M Oil Circulation
- Modulator Valve Unit
- Interior schematic (not exact representation)
- Modulation Mechanism
- Modulator valve operation
- Control Valve Assembly
- Clutch solenoid valve assembly
- Clutch valve assembly
- Accumulator assembly
- Direct charge valve
- Lock-up clutch solenoid valve
Check & Adjustment Torque Converter and Transmission Group
Clutch Oil Pressure and Time Lag1 topic
- Measuring clutch oil pressure
Function & Structure Hydraulic Group
Flushing Hydraulic Circuit1 topic
- Purpose of flushing
Cautions on Hydraulic Parts Replacement
Hydraulic Circuit Symbols9 topics
- Hydraulic lines
- Pumps & motors
- Cylinders
- Operation methods
- Pressure control valve
- Flow control valve
- Directional control valve
- Check valve
- Miscellaneous hydraulic symbols
Hydraulic System Operation1 topic
- Hydraulic system operation outline
Layout of Hydraulic Units
Hydraulic Tank3 topics
- Hydraulic tank breather valve (tank cap)
- Hydraulic tank specifications
- Hydraulic oil level check
Hydraulic Pump41 topics
- Loading and pilot and brake pump
- Pump specifications
- Steering pump
- Steering pump specifications
- Hydraulic pump principle
- Hydraulic pump wear plate
- Hydraulic pump bushing lubrication
- Hydraulic Cylinder
- Boom cylinder
- Bucket cylinder
- Steering cylinder
- Hydraulic cylinder specifications
- Loading System
- Reducing Valve (for Pilot Pressure)
- Pilot Valve
- Pilot valve function
- Pilot valve operation (modulated position)
- Pre-detent and detent magnet solenoid
- Multiple Control Valve (KML35A/2T103)
- Multiple control valve specifications
- Multiple control valve main relief valve
- Multiple control valve overload relief valve (with make-up function)
- Multiple control valve make-up valve
- Multiple control valve bucket spool
- Multiple control valve boom spool
- Adapter (Orifice)
- Ride Control (OPT)
- Ride control hydraulic circuit
- Ride control operation
- Ride control valve assembly (Reducing valve circuit)
- Ride control valve assembly (Accumulator circuit)
- Accumulator (for ride control)
- Steering System
- Orbitrol ®
- Orbitrol ® structure
- Orbitrol ® specifications
- Orbitrol ® operation
- Orbitrol ® feed-back mechanism operation
- Steering speed and flow rate control
- Hydraulic pump oil amount and steering force
- Orbit rotor operation principle
Steering Valve (KVS32-A4.0/21)6 topics
- Steering valve operation
- Steering spool variable throttle
- Steering valve flow control spool
- Steering valve main relief valve
- Steering valve overload relief valve
- Steering pilot circuit and its operation
Show all 59 sections
Stop Valve2 topics
- Stop valve function
- Stop valve operation
Reducing Valve (for Orbitrol ® )
Steering Line Filter
Efficient Loading System4 topics
- Efficient loading system outline
- Mounting of the ELS valve
- Mounting of the variable kickout sensor
- Efficient loading system operation
Fan Motor System1 topic
- Mounting of fan motor
Fan Motor Line3 topics
- Hydraulic circuit (fan motor normal rotation)
- Proportional relief valve (S/N 9001~9050)
- Proportional relief valve (S/N 9051~)
Reversing Fan Motor Line (OPT)2 topics
- Reversing fan motor function
- Hydraulic circuit (Reverse rotation)
Secondary Steering1 topic
- Secondary steering circuit
Check & Adjustment Hydraulic Group
Loading/Steering Circuit Relief Valve/Ride Control Circuit Reducing Valve (OPT)38 topics
- Loading circuit relief valve setting pressures
- Ride control circuit reducing valve setting pressures (OPT)
- Steering circuit relief valve setting pressures
- Cylinder natural drift
- Stop Valve
- Stop valve adjustment procedure
- Function & Structure Brake Group
- Brake System Outline
- Service brake
- Parking brake
- Adjustment of axle internal pressure
- Brake Units Layout
- Unloader Valve
- Unloader valve operation
- Valve Unit
- Accumulator
- Brake Valve
- Brake valve performance chart
- Brake valve outline
- Service Brake
- Service brake operation
- Service brake friction disc
- Service brake steel plate
- Service brake piston
- Service brake pedal stroke adjusting mechanism
- Brake circuit air bleeding procedure
- Parking Brake
- Parking brake operation
- Parking brake friction disc
- Parking brake steel plate
- Parking brake solenoid valve
- Parking Brake Manual Release
- Brake Circuit Check Valve
- Auto Brake
- Auto brake circuit
- Auto brake operation set value
- Reducing valve (for Autobrake circuit)
- Solenoid valve (for Autobrake circuit)
Pressure Sensor (for stop lamp and declutch)2 topics
- Pressure sensor (for stop lamp)
- Pressure sensor (for Declutch)
Check & Adjustment Brake Group
Brake Circuit Oil Pressure2 topics
- Unloader valve setting pressure
- Brake valve oil pressure
Service Brake3 topics
- Service brake performance check
- Service brake friction plate wear measurement
- Cautions on installing brake discs
Parking Brake1 topic
- Parking brake performance check
Function & Structure Electrical Group
How to Use Electrical Wiring Diagram
Utilisation des schémas des câblages électriques (FRANÇAIS)
Verwendung des elektrischen Schaltplans (DEUTSCH)
Modalità di utilizzo dello schema dei collegamenti elettrici (ITALIANO)
Cómo utilizar un Diagrama de Alambrado Eléctrico (ESPAÑOL)
Como Utilizar o Diagrama de Ligações Eléctricas (PORTUGUÊS)
Electrical Cable Color Codes
Electrical Circuit Symbols
Sensor Mount
Fuse2 topics
- Fuse box
- Fusible link
Engine Start Circuit40 topics
- Engine start circuit diagram
- Neutral starter
- Starter switch
- Battery relay
- Alternator I terminal wire
- Diode unit
- Neutral relay
- Magnetic switch
- Voltage relay
- Power Generating/Charging Circuit
- Alternator
- ECM (Engine Controller)
- Function of ECM
- Connection diagram
- Monitor lamp test
- Failure diagnosis
- Quantum fault code information
- Accelerator pedal
- Transmission Control Circuit and Monitor Circuit
- Machine control unit (MCU)
- MCU connection diagram
- Machine control unit (MCU) function
- Modulator valve operation
- Adjustable declutch preset switch
- Monitoring system
- Operation monitor lamps
- Instrument Panel and Switch
- Instrument panel
- Instrument panel rear surface
- Gauge circuit
- Fuel gauge circuit
- MODM
- MODM function
- Monitor Changeover
- Information Monitor
- Replacement Monitor
- Fault Log Monitor
- Input/Output Monitor
- Parameter Setting Monitor
- Specification Setting Monitor
Electrical Detent Circuit5 topics
- Bucket leveler
- Detent solenoid
- Lift kickout & lower kickout
- Sensor assy
- Preset height adjustment
Diode3 topics
- Diode check method
- Caution for diode check method
- Surge voltage and surge suppression diodes
Function & Structure Operator Station Group
Cabin3 topics
- Glass
- Wiper mount
- Wiper motor
Operator Seat
Steering and Transmission Shift Lever3 topics
- Tilt case
- Column shaft
- Shift lever
Air Conditioner7 topics
- Air conditioner components
- Denso air conditioner structure
- Function of cooling mechanism
- Cooling circuit
- Electrical circuit
- Air conditioner functions of components
- Charge of refrigerant
Troubleshooting12 topics
- Air conditioner
- Check & Adjustment Operator Station Group
- Adjustment of lubricating oil quantity when components of air conditioner are replaced
- Adjustment of air gap (between hub and rotor) in compressor magnetic clutch
- Compressor V-belt adjustment
- Parts to be replaced periodically
- Function & Structure Supplement
- Foreword
- Quick Coupler
- Power Boost Circuit
- Short Boom (OPT)
- Limited Slip Differential (LSD)
Inside this manual
Real pages from this operational principle technical service manual (526 pages). Open the sample pages (PDF, 496 KB)
- Diagram, page 136: Function & Structure Hydraulic Group
- Specifications, page 224: Function & Structure Hydraulic Group
- Troubleshooting, page 376: Function & Structure Electrical Group
Other manuals for this machine
Save 10% on 2 manuals, 15% on 3 or more. Other manuals for the ZW550 are listed below. Editions cover different serial number ranges: check the serial coverage and tick only the ones that match your machine.
This manual: Operational Principle Technical Service Manual TO11C5-E-00$69.93
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Manual types
This manual is a operational principle technical service manual. For reference, the three main manual types:
Service manual
Factory repair procedures and technical information such as specifications, troubleshooting, and wiring and hydraulic diagrams, for the models and systems the manual covers. See What's inside for its topics.
Operator's manual
Safe operation, controls, maintenance schedules, lubrication points, inspections, and basic checks. Repair procedures are in the service manual.
Parts manual
Illustrated diagrams with factory part numbers for identifying components and ordering parts. Repair procedures are in the service manual.
Engine service manuals are sometimes sold separately, since certain machine models were offered with more than one engine option.
What it's used for
Factory manual for in-house farm and construction shop use. Straightforward, complete, and easy to follow. It contains the OEM information dealership service departments and parts counters use to diagnose problems, identify components, and perform maintenance or repairs correctly.
Service shops and owner/operators who repair their own equipment
Identifying correct parts and seeing how assemblies come apart and go back together
Keeping equipment running with less downtime
Factory manual, 526 pages
Quantity one is the manual described above.
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