Description

Hitachi ZW370, ZW370-G Wheel Loader Service Manual

The manual is applicable for the Hitachi ZW370, ZW370-G Wheel Loader Model

Format: PDF
Language: English
Service Manual consists of the following:

For Model ZW370-G as mentioned above:

Service Manual (Troubleshooting) : Vol. No.TTNHB (92 Pages)
Operation Manual : Vol. No.TONHB (647 Pages)
Workshop Manual : Vol. No.WNHB (347 Pages)

For Model ZW370 as mentioned above:

Service Manual (Troubleshooting) : Vol. No.TT97C5-E (113 Pages)
Operation Manual : Vol. No.TO97C5-E (593 Pages)
Workshop Manual : Vol. No.W97C5-E (349 Pages)

Table of Content of the Workshop Manual

CONTENTS
General Information ……………………………………………………………………………………………………………………………. 00-1
Symbols ………………………………………………………………………………………………………………………………………… 00-2
Weight of Main Components …………………………………………………………………………………………………………….. 00-3
Bolt Tightening Torque …………………………………………………………………………………………………………………….. 00-4
Hose Band Tightening Torque …………………………………………………………………………………………………………… 00-8
Liquid Gasket and Screw Lock Agent ………………………………………………………………………………………………… 00-9
Cautions regarding parts removal ………………………………………………………………………………………………… 00-9
Cautions regarding reassembly …………………………………………………………………………………………………… 00-9
Screw lock agent application procedure ……………………………………………………………………………………… 00-10
How to wind a seal tape ……………………………………………………………………………………………………………. 00-10
Cautions Regarding Welding Repair Service ………………………………………………………………………………………00-11
Cautions Regarding Handling of Bearing ………………………………………………………………………………………….. 00-13
Bearing installation cautions ……………………………………………………………………………………………………… 00-13
Interference fits for a bearing …………………………………………………………………………………………………….. 00-13
Bearing removal cautions …………………………………………………………………………………………………………. 00-14
Applying and Storing Articulation Stopper …………………………………………………………………………………………. 00-15
Applying articulation stopper ……………………………………………………………………………………………………… 00-15
Storing articulation stopper ……………………………………………………………………………………………………….. 00-16
Disassembly & Reassembly Chassis Group …………………………………………………………………………………………… 14-1
Deck ……………………………………………………………………………………………………………………………………………… 14-2
Deck removing and installing ………………………………………………………………………………………………………. 14-2
Fuel Tank ………………………………………………………………………………………………………………………………………. 14-3
Fuel tank removing and installing ………………………………………………………………………………………………… 14-3
Hydraulic Tank ……………………………………………………………………………………………………………………………….. 14-5
Hydraulic tank removing and installing …………………………………………………………………………………………. 14-5
Engine Room …………………………………………………………………………………………………………………………………. 14-7
Engine room removing and installing ……………………………………………………………………………………………. 14-7
Cab ………………………………………………………………………………………………………………………………………………. 14-9
Cab removing and installing ………………………………………………………………………………………………………… 14-9
Floor Board ……………………………………………………………………………………………………………………………………14-11
Floor board removing and installing ……………………………………………………………………………………………..14-11
Boom …………………………………………………………………………………………………………………………………………… 14-13
Boom removing and installing ……………………………………………………………………………………………………. 14-13

The above is only an extract of the table of content and not the whole table.

Hitachi ZAXIS ZW370, ZW370-G service manual consists of the Troubleshooting and the Workshop Manual.

• Information included in the Service Manual: Technical information needed for redelivery and delivery, operation and activation of all devices and systems, operational performance tests, and troubleshooting procedures.
• Information included in the Workshop Manual: Technical information needed for maintenance and repair of the machine, tools and devices needed for maintenance and repair, maintenance standards, and removal / installation and assemble / disassemble procedures.

Pilot valve assembling
To reassemble the pilot valve, follow the above disassembly procedure in reverse order.
Pilot valve assembly cautions
– Clean and check all the parts. If any part is defective, replace or repair it.
– Replace all the O-rings and seals with new ones.
– Apply the specified torque to tighten each main part.
– Apply a thin coat of hydraulic oil or grease to each part before reassembly.
– Measure the resistance of each coil magnet assembly.
The resistance should be 62 Ω at normal room temperature [(20ºC) (70ºF)]. If measured in extremely low temperatures the resistance will be less, and at operating temperature the resistance will be higher.
– Be aware that the assembled parts, such as the push rod, spring, etc. are different depending on the ports. Use the correct parts.
– Insert scraper (41) in correct direction.
– Do not push push rod (37) too much with the set screw while adjusting the position of the lever (31). It may cause bumping at Neutral position, resulting in unexpected movement at starting the engine.

• Workshop Manual
• SECTION 1 GENERAL INFORMATION
  Group 1 Precautions for disassembling and
  Assembling
  Group 2 Tightening Torque
  Group 3 Painting
  Group 4 Bleeding Air from Hydraulic Oil Tank
  SECTION 2 UPPERSTRUCTURE
  Group 1 Cab
  Group 2 Counterweight
  Group 3 Main Frame
  Group 4 Pump Device
  Group 5 Control Valve
  Group 6 Swing Device
  Group 7 Pilot Valve
  Group 8 Pilot Shut-Off Valve
  Group 9 Signal Control Valve
  Group 10 Travel Shockless Valve
  Group 11 Solenoid Valve
  Group 12 Pilot Relief Valve
  Group 13 Steering Valve
  Group 14 Brake Valve
  Group 15 Accumulator Charging Valve
  Group 16 Transmission Control Valve
  SECTION 3 UNDERCARRIAGE
  Group 1 Swing Bearing
  Group 2 Travel Motor
  Group 3 Center Joint
  Group 4 Transmission
  Group 5 Axle
  Group 6 Axle Lock Cylinder
  Group 7 Operate-Check Valve
  Group 8 Propeller Shaft
  SECTION 4 FRONT ATTACHMENT
  Group 1 Front Attachment
  Group 2 Cylinder
  Group 3 Hose-Rupture Safety Valve
  Group 4 Operate-Check Valve
  SECTION 5 ENGINE

  Service Manual (Troubleshooting)
  SECTION 4 OPERATIONAL PERFORMANCE
  TEST
  Group 1 Introduction
  Group 2 Standard
  Group 3 Engine Test
  Group 4 Excavator Test
  Group 5 Component Test
  Group 6 Adjustment
  SECTION 5 TROUBLESHOOTING
  Group 1 General
  Group 2 Component Layout
  Group 3 Troubleshooting A
  Group 4 Troubleshooting B
  Group 5 Troubleshooting C
  Group 6 Electrical System Inspection
  Group 7 ICX