Hitachi 70ZIV-2 Wheel Loader Shop Manual – Disassembly, Reassembly & Service Standard

Description

Hitachi 70ZIV-2 Wheel Loader Shop Manual – Disassembly, Reassembly & Service Standard

This Hitachi 70ZIV-2 Wheel Loader Shop Manual is the dedicated disassembly, reassembly, and service standard volume (document 93208-00661, dated April 2019). It is the hands-on companion to the General Information and Function & Structure manuals, providing the step-by-step removal, installation, teardown, and rebuild procedures plus the dimensional and torque standards a technician needs to bring a 70ZIV-2 back to specification.

File Details

• Manual type: Shop Manual – Disassembly & Reassembly and Service Standard
• Brand: Hitachi
• Model: 70ZIV-2 Wheel Loader
• Document number: 93208-00661
• Edition/date: April 2019
• Language: English
• Page count: 304 pages
• File format: PDF

Chapters Covered

General Information

• Symbols
• Weight of Main Components
• Bolt Tightening Torque
• Hose Band Tightening Torque
• Liquid Gasket and Screw Lock Agent
• Cautions Regarding Welding Repair Service
• Applying and Storing Articulation Stopper

Disassembly & Reassembly – Chassis Group

• Deck
• Fuel Tank
• Hydraulic Tank (including return filter and breather valve)
• Engine Room
• Cab
• Floor Board
• Boom
• Dust Seal
• Bushing
• Center Pin (upper and lower)

Service Standard – Chassis Group

• Linkage
• Linkage Pin Standard Clearance Values
• Center Pin
• Bucket
• Bucket Positioner and Boom Kick-Out

Disassembly & Reassembly – Power Group

• Power Line
• Radiator
• Engine
• Propeller Shaft
• Air Cleaner
• Muffler
• Front Axle Assembly (including Planetary Assy, Floating Seal, Internal Gear Hub, Spider Assembly)
• Rear Axle Assembly
• Axle Support
• Differential Assembly
• Front Differential
• Special Tools for Axle

Service Standard – Power Group

• Propeller Shaft Service Standard
• Axle and Differential Service Standard

Disassembly & Reassembly – Torque Converter and Transmission Group

• Torque Converter and Transmission Assembly
• Transmission Assembly
• Torque Converter
• Transmission Clutch Pack (Forward/Reverse)
• Control Valve Assembly

Service Standard – Torque Converter and Transmission Group

• Piston/Spool-Housing Clearances
• Spring Free Length and Installed Load
• Oil Seal Lip and Shaft Diameter
• Seal Ring (Piston Ring)
• Clutch Thrust Washer, Clutch Plate, Steel Plate, Clutch Clearance

Disassembly & Reassembly – Hydraulic Group

• Hydraulic Parts Removal and Installation Warning
• Hydraulic Parts Disassembly and Assembly Cautions
• Gear Pump (Triple Pump)
• Steering Valve (S/N ~2200, ~8250)
• Multiple Control Valve (S/N ~1481 and S/N 1482~)
• Hydraulic Cylinder (Boom, Bucket, Steering)
• Pilot Valve
• Orbitrol (S/N 2201~, 8251~)
• Priority Valve (S/N 2201~, 8251~)
• Accumulator (S/N 2201~, 8251~)

Service Standard – Hydraulic Group

• Steering Linkage
• Gear Pump
• Hydraulic Cylinder
• Pilot Valve

Disassembly & Reassembly – Brake Group

• Brake Valve Assembly
• Air Master Assembly
• Service Brake
• Air Cylinder for Parking Brake
• Parking Brake
• Air Tank

Service Standard – Brake Group

• Brake Valve
• Air Master
• Service Brake
• Parking Brake

Disassembly & Reassembly – Electrical Group

• Wiper Motor (front and rear)
• Controller
• Fuse Box

Disassembly & Reassembly – Operator Station Group

• Air Conditioner
• A/C Condenser
• A/C Compressor

Service Standard – Operator Station Group

• Air Conditioner Periodical Inspection/Servicing
• Tightening Torque
• Compressor Adjustment Standard

What This Hitachi 70ZIV-2 Shop Manual Delivers

Where the General Information and Function & Structure manuals explain how the machine is built and how its systems operate, this 70ZIV-2 Shop Manual is the volume you actually have open on the bench. Every chapter follows a remove – disassemble – assemble – install pattern, backed by the wear limits, clearances, and torque figures that decide whether a component goes back into service or into the scrap bin.

The Chassis Group chapters walk through pulling the deck, fuel tank, hydraulic tank, engine room, cab, floor board, and boom, then cover the bushings, dust seals, and center pins that carry the articulation. The matching Service Standard section gives you the linkage pin clearance table, liner adjustment method, bucket tooth and wear edge torque values, and the shim procedure for setting center pin clearance.

The Power Group is covered in depth – radiator, engine, propeller shafts, air cleaner, muffler – along with full teardown of the front and rear axle assemblies. That includes the planetary assembly, floating seal installation, internal gear hub, spider assembly, axle support bushings, and differential. The differential chapter alone walks through pinion preload measurement, backlash adjustment (0.25-0.33 mm), tooth contact patterns, and the shim/spacer selection that gets you there. Special tool drawings for axle work are included so you can fabricate or verify the jigs.

For the Torque Converter and Transmission Group, the manual covers pulling the complete assembly, separating the transmission, rebuilding the torque converter, disassembling the forward/reverse and speed clutch packs, and servicing the control valve. The Service Standard section lists piston-to-housing clearances, spring free lengths and installed loads, seal ring dimensions, clutch plate thicknesses, and the conical plate free heights that tell you when a clutch pack is out of spec.

Hydraulics get the same treatment – the triple gear pump, steering valve, multiple control valve (both early and late serial versions), boom/bucket/steering cylinders, pilot valve, Orbitrol, priority valve, and accumulator. Cylinder rebuild chapters give piston nut torque, rod cover bolt torque, slipper ring heating temperature, and the air bleeding sequence that prevents seal seizure.

Brakes are covered from the pedal down – brake valve, air master, service brake, parking brake air cylinder, parking brake, and air tank – with assembly cross sections, torque values, and the air bleeding procedure that must be followed before the machine moves.

Rounding it out are the Electrical Group (wiper motors, controller, fuse box with full fuse chart) and Operator Station Group (air conditioner, condenser, compressor, and the periodic inspection criteria for the A/C system).

Why This Manual Matters for 70ZIV-2 Service

The 70ZIV-2 is a articulated wheel loader with a lot of systems packed into a compact chassis. Guessing at torque values, shim thicknesses, or preload settings on the center pin, differential, or clutch packs leads to premature failure, vibration, oil leaks, or worse – a machine that won’t hold a grade or steer predictably. This shop manual removes the guesswork. It gives you the sequence, the tool, the measurement, and the limit for each job.

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Instant PDF Delivery

The manual is delivered as an instant-download PDF after checkout – no shipping, no waiting. Open it on a laptop, tablet, or phone in the shop, print the pages you need for the job, and keep the full 304-page reference on hand for every 70ZIV-2 service task.