Hitachi ZW370-G Wheel Loader Operational Principle Technical Service Manual
647 pages · Publication TONHB-E-00
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- Models
- ZW370-G
- Manual type
- Operational Principle Technical Service Manual
- Pages
- 647
- Publication
- TONHB-E-00
- Condition
- Brand new
What's inside
From the manual's own table of contents: 51 sections, 381 entries. See sample pages (PDF, 640 KB)
General30 topics
- General Information
- How to Use Manual
- Safety precautions
- Symbols
- Outline
- Layout of main components
- 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
- 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
- Grease nipple installation direction
- Installing bearing outer ring
Function & Structure Power Group
Power Line
Engine / Transmission1 topic
- Engine / transmission mount
Radiator1 topic
- Radiator mount
Propeller Shaft2 topics
- Second propeller shaft assembly
- Third propeller shaft assembly
Axle Assembly
Axle Support
Differential Gear2 topics
- Function of T.P.D
- Operation of T.P.D
Check & Adjustment Power Group
Engine5 topics
- Measuring engine speed
- Measuring engine oil pressure
- Propeller shaft phase
- Second propeller shaft alignment
- Propeller shaft tightening torque
Axle33 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 Gear Pump
- Gear pump specifications
- Clutch combination
- Planetary gear
- Shift lever position
- QUAD switch 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 to the clutch
- T/C and T/M Oil Circulation
- Modulator Valve Unit
- Interior schematic (example)
- Modulation Mechanism
- Modulator valve function
- Modulator valve operation
- Clutch Solenoid Valve
- For high/reverse and speed clutches
- Check & Adjustment Torque Converter and Transmission Group
- Clutch Oil Pressure and Time Lag
- Measuring clutch oil pressure
- Measuring clutch time lag
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 specifications
- Hydraulic oil level check
- Hydraulic tank (S/N 0451~)
Hydraulic Pump34 topics
- Loading and pilot and brake pump
- Pump specifications
- Steering pump (S/N 0399~)
- 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)
- Multiple Control Valve (KML35A/2T003B)
- Multiple control valve specifications
- Multiple control valve main relief valve
- Multiple control valve overload relief valve
- Multiple control valve make-up valve
- Multiple control valve bucket spool
- Multiple control valve boom spool
- Adapter (Orifice)
- Vibration Damper (OPT)
- Vibration damper hydraulic circuit
- Vibration damper operation
- Vibration damper hydraulic line
- Steering System
- Orbitrol ®
- Orbitrol ® specification
- Orbitrol ® structure
- 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)6 topics
- Steering valve operation
- Steering plunger variable throttle
- Steering valve flow control plunger
- Steering valve main relief valve
- Steering valve overload relief valve
- Steering pilot circuit and its operation
Stop Valve2 topics
- Stop valve function
- Stop valve operation
Reducing Valve (for Orbitrol ® )
Show all 52 sections
Steering Line Filter
Fan Motor System36 topics
- Valve assembly (for fan motor)
- Relief valve (two-step relief)
- Relief valve (two-step relief) operation
- Solenoid valve (for fan speed control)
- Thermo sensing valve
- Fan motor relief valve assembly
- Fan motor relief valve
- Fan motor check valve (make-up valve)
- Thermo sensing valve
- Fan motor relief valve assembly
- Fan motor relief valve
- Fan motor check valve (make-up valve)
- Emergency Steering (for Europe)
- Emergency steering operation condition
- Emergency steering line oil flow
- Emergency steering motor and pump
- Check & Adjustment Hydraulic Group
- Loading/Steering Circuit Relief Valve
- Loading circuit relief valve setting pressures
- Steering circuit relief valve setting pressures
- Cylinder natural drift
- Stop Valve
- Stop valve adjustment procedure
- Fan Revolution (S/N 0101~)
- Fan maximum revolution measurement (S/N 0101~0230)
- Fan maximum revolution measurement (S/N 0231~)
- Fan Revolution (S/N 9001~)
- Fan maximum revolution measurement (S/N 9001~9010)
- Fan maximum revolution measurement (S/N 9011~)
- Function & Structure Brake Group
- Brake System Outline
- Service brake
- Parking brake
- Auto brake
- Adjustment of axle internal pressure
- Brake Units Layout
Unloader Valve1 topic
- Unloader valve operation
Valve Unit
Reducing Valve
Brake Accumulator Line1 topic
- Brake circuit check valve
Brake Valve4 topics
- Brake main valve (left pedal)
- Brake pilot valve (right pedal)
- Brake valve performance chart
- Brake valve outline
Stop Lamp Pressure Switch2 topics
- Pressure switch (for stop lamp)
- Pressure switch (for declutch)
Service Brake6 topics
- Service brake operation
- Service brake friction plate
- Service brake steel plate
- Service brake piston
- Service brake pedal stroke adjusting mechanism (S/N 0101~0311, 9001~9095)
- Brake circuit air bleeding procedure
Parking Brake1 topic
- Parking brake operation chart
Parking Brake (Rear)3 topics
- Parking brake solenoid valve (rear)
- Parking brake manual release procedure (rear)
- Parking brake spring chamber
Parking Brake (Front) (for Europe only)43 topics
- Parking brake solenoid valve (front)
- Front parking brake auto adjuster mechanism
- Parking brake line air bleeding procedure (front parking)
- Parking brake manual release procedure (front)
- Auto Brake
- Auto brake circuit
- Auto brake operation set value
- Shuttle valve
- Check & Adjustment Brake Group
- Brake Circuit Oil Pressure
- Unloader valve setting pressure
- Accumulator circuit pressure
- Brake valve oil pressure
- Service Brake
- Service brake performance check
- Service brake friction plate wear measurement
- Parking Brake
- Parking brake performance check
- Parking brake clearance adjustment
- 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
- Fuse
- Fuse box
- Fusible link
- Engine Start Circuit
- Neutral starter
- Engine start circuit diagram (S/N 0361~)
- Neutral starter
- Starter switch
- Battery relay
- Alternator I terminal wire
- Diode unit
- Neutral relay
- Magnet switch
- Voltage relay
Power Generating/Charging Circuit1 topic
- Alternator
ECM (Engine Controller)6 topics
- Function of ECM
- Connection diagram
- Monitor lamp test
- Failure diagnosis
- Quantum fault code information
- Accelerator pedal
Transmission Control Circuit and Monitor Circuit (S/N 0101~0358, 9001~)3 topics
- Controller
- Controller connection diagram
- Controller function
Transmission Control Circuit and Monitor Circuit (S/N 0359~)3 topics
- Machine control unit (MCU)
- Machine control unit (MCU) connection diagram
- Emergency steering function (For Europe only)
Monitoring System3 topics
- Monitor controller
- Monitor controller connection diagram
- Monitor controller function
Instrument Panel and Switch43 topics
- Instrument panel
- Instrument panel rear surface
- Gauge circuit
- Tachometer circuit
- Fuel gauge circuit
- Electrical Detent Circuit
- Bucket leveler
- Boom kick-out (option)
- Detent solenoid
- Diode
- Diode check method
- Caution for diode check method
- Surge voltage and surge suppression diodes
- Diagnostic System
- Diagnostic system flow
- Monitor controller
- Diagnostic failure history indication and deletion
- Diagnostic switch
- MODM function
- Monitor Changeover
- MODM: Input/output monitor - Input/output signal correspondence table
- Check & Adjustment Electrical Group
- Cautions Regarding Electric Circuit Check
- Disconnecting or reinstalling connector
- How to attach the probes of the circuit tester
- Electrical Transmission Control System Troubleshooting Flowchart
- Standard troubleshooting flowchart
- Transmission Controller Abnormal Operation Judgment
- Transmission controller check
- Transmission controller LED indicator
- Electrical Circuit Check
- Shift lever input electrical circuit check
- Inching (declutch) input electrical circuit check
- QUAD switch input electrical circuit check
- Machine speed sensor input electrical circuit check
- Clutch solenoid valve output electrical circuit check
- Modulator valve output electrical circuit check
- Check output circuit wiring
- Neutral relay electrical circuit check
- Parking brake electrical circuit check
- Auto brake electrical circuit check
- Gauge circuit electrical circuit check
- Fuel level gauge electrical circuit check
Shift Lever1 topic
- Operation force measurement
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 Conditioner8 topics
- Air conditioner components
- Air conditioner structure
- Cooling mechanism
- Cooling circuit
- Electrical circuit
- Air conditioner functions of components
- Charge of refrigerant
- Air conditioner troubleshooting
Check & Adjustment Operator Station Group26 topics
- Adjustment of lubricating oil quantity when components of air conditioner are replaced
- Adjustment of air gap (between hub and rotor) in compressor magnetic clutch
- Parts to be replaced periodically
- Cross-Section Drawing & Diagrams
- Axle Assembly
- Torque Converter and Transmission
- Loading/Steering Hydraulic Line (S/N 0101~0230)
- Loading/Steering Hydraulic Line (S/N 0231~)
- Loading/Steering Hydraulic Circuit (S/N 9001~9010)
- Loading/Steering Hydraulic Circuit (S/N 9011~)
- Brake Circuit
- Electrical Wiring Diagram (1/3) (S/N 0359~)
- Electrical Wiring Diagram (2/3) (S/N 0359~)
- Electrical Wiring Diagram (3/3) (S/N 0359~)
- Electrical Wiring Diagram (1/2) (S/N 9081~)
- Electrical Wiring Diagram (2/2) (S/N 9081~)
- Electrical wiring diagram abbreviation chart (S/N 0101~0360, 9001~)
- Electrical wiring diagram abbreviation chart (S/N 0361~)
- Electrical Wiring Diagram (CAB)
- Electrical Connection Diagram (S/N 0101~0237)
- Electrical Connection Diagram (S/N 0238~0252)
- Electrical Connection Diagram (S/N 0253~0360)
- Electrical Connection Diagram (S/N 0361~)
- Electrical Connection Diagram (S/N 9001~9064)
- Electrical Connection Diagram (S/N 9065~)
- Electrical Equipment Layout
Electrical Circuit Diagram (Cabin Air Conditioner)
Electrical Wiring Diagram (Cabin Air Conditioner)
Equipment Operation Table (Cabin Air Conditioner)
Inside this manual
Real pages from this operational principle technical service manual (647 pages). Open the sample pages (PDF, 639 KB)
- Troubleshooting, page 448: Function & Structure Electrical Group
- Diagram, page 518: Function & Structure Operator Station Group
- Specifications, page 578: Cross-Section Drawing & Diagrams
- Foldout diagram, page 594: Cross-Section Drawing & Diagrams
Other manuals for this machine
Save 10% on 2 manuals, 15% on 3 or more. Other manuals for the ZW370-G 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 TONHB-E-00$69.55
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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, 647 pages
Quantity one is the manual described above.
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Questions about model, serial number, engine coverage or contents? Contact us before purchasing and we'll help confirm it's the right manual. Please verify the manual type, machine model, serial number range and engine coverage before purchasing: manuals ordered in error carry a 20% restocking fee (return policy).