Fiat Hitachi WHEEL LOADER W90 Excavator Service Manual – PDF DOWNLOAD

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Fiat Hitachi WHEEL LOADER W90 Excavator Service Manual – PDF DOWNLOAD

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Fiat Hitachi WHEEL LOADER W90 Excavator Service Manual – PDF DOWNLOAD

Language : English
Pages : 321
Downloadable : Yes
File Type : PDF

DESCRIPTION:

Fiat Hitachi WHEEL LOADER W90 Excavator Service Manual – PDF DOWNLOAD

SAFETY RULES
GENERALITIES

• Read this Manual carefully before starting, operating, maintaining, fuelling or servicing the machine. Read and comply with all safety precautions before any intervention. Do not allow unauthorised personnel to operate or service this machine.
• Do not wear rings, wrist watches, jewellery, loose or hanging garments, such as ties, torn clothing, scarves, unbuttoned or unzipped jackets that can get caught in moving parts. Wear certified safety clothes such as: hard hat, noslip footwear, heavy gloves, ear protection, safety glasses, reflector vests, respirators.
• Ask your employer about specific safety equipment requirements. Keep the operator’s compartment, step plates, grab-rails and handles clean and clear of foreign objects, oil, grease, mud or snow to minimize the danger of slipping or stumbling. Remove mud or grease from your shoes before attempting to mount or operate the machine. Do not jump on or off the machine.
• Always keep both hands and one foot, or both feet and one hand in contact with steps and grab rails. Do not use controls or hoses as hand holds when climbing on or off the machine. Hoses and controls are movable parts and do not provide solid support. Besides, controls may be inadvertently moved and cause unexpected movement of the machine or its attachments. Never operate the machine or its attachments from any position other than sitting in the driver’s seat.
• Keep head, body, limbs, hands and feet inside the operator’s compartment at all times to reduce exposure to external hazards . Be careful of possible slippery conditions of the steps and hand rails as well as of the ground around the machine. Do not leave the machine until it is has come to a complete stop. Check the seat safety belt at least twice per year and replace it if it shows signs of wear, fraying or other weakness that could lead to failure.

IMAGES PREVIEW OF THE MANUAL:

TABLE OF CONTENTS:

Fiat Hitachi WHEEL LOADER W90 Excavator Service Manual – PDF DOWNLOAD

Introduction......................................................................  1
Summary...........................................................................  3
	Specifications................................................................  4
	Capacities and Fluid Types....................................................  6
	Safety Rules..................................................................  7
	Units of Measure Used in the Manual........................................... 14
	Tightening Torques............................................................ 14
	Section 1 : Engine............................................................ 17
		1.1 General Description................................................... 18
		1.2 General Characteristics............................................... 19
		1.3 Specifications and Assembly Clearances................................ 22
		1.4 Fuel Injection Pump Specifications.................................... 28
		1.5 External Views........................................................ 29
		1.6 Engine Supports....................................................... 30
		1.7 Main Tightening Torques and Pressure Ports............................ 31
		1.8 Lubrication System.................................................... 32
		1.9 Cooling System........................................................ 33
			1.9.1 General Description............................................. 34
			1.9.2 Radiator........................................................ 35
		1.10 Fuel System.......................................................... 36
			1.10.1 Fuel Tank...................................................... 37
		1.11 Air Intake and Exhaust System........................................ 38
			1.11.1 General Description............................................ 38
			1.11.2 Turbocharger................................................... 38
			1.11.3 Air Filter..................................................... 40
		1.12 Electrical System.................................................... 41
			1.12.1 Batteries...................................................... 41
			1.12.2 Start Switch................................................... 41
			1.12.3 Cold Engine Start.............................................. 42
			1.12.4 Engine Shut-Down Solenoid Valve................................ 42
			1.12.5 Engine Pre-Heating Sequence.................................... 43
			1.12.6 Pre-Heating Malfunction Warning Lamp Modes..................... 43
			1.12.7 Throttle Control Linkage....................................... 44
	Section 2 : Transmission...................................................... 45
		2.1 General Description................................................... 46
		2.2 Torque Convertor - Transmission....................................... 47
		2.3 Torque Convertor...................................................... 52
		2.4 Transmission - Convertor Pump......................................... 53
		2.5 Transmission.......................................................... 54
			2.5.1 Directional Clutch Shaft........................................ 54
			2.5.2 Power Transfer Schematic........................................ 57
			2.5.3 Transmission Control Valve...................................... 59
			2.5.4 Transmission Control System..................................... 75
		2.6 Transmission Disassembly/Re-Assembly.................................. 80
			2.6.1 Disassembly..................................................... 80
			2.6.2 Re-Assembly..................................................... 94
			2.6.3 Troubleshooting.................................................108
			2.6.4 Standard Values for Manteinance.................................111
			2.6.5 Tightening Torques for Main Bolts...............................113
		2.7 Oil Circuits..........................................................114
		2.8 Drive Shafts..........................................................116
		2.9 Axles (Front and Rear)................................................118
			2.9.1 Axle............................................................118
			2.9.2 Differential Assembly...........................................122
			2.9.3 Final Drives....................................................124
			2.9.4 Axles...........................................................126
		2.10 Wheels...............................................................157
			2.10.1 Tyres..........................................................157
	Section 3 : Braking System....................................................159
		3.1 General Description...................................................160
		3.2 Operation.............................................................162
			3.2.1 Operating Conditions............................................162
		3.3 Disc Brake............................................................165
		3.4 Brake Pedal Valve.....................................................166
			3.4.1 Circuit Separation Valve Operation Inside the Braking System....168
		3.5 Parking Brake Control Valve...........................................169
		3.6 Parking Brake.........................................................170
			3.6.1 Manual Release Procedure........................................170
			3.6.2 Disc Parking Brake Operation....................................171
			3.6.3 Brake Disengagement.............................................171
		3.7 Other Components......................................................172
			3.7.1 Brake Accumulator...............................................172
			3.7.2 Check Valve.....................................................172
		3.8 Brake Pedal Valve Hydraulic Connections...............................173
		3.9 Diagnostics and Testing...............................................174
			3.9.1 Brake Control Pressure Testing Test.............................176
			3.9.2 Min and Max Accumulator Recharge Pressure Adjustment............177
			3.9.3 Parking Brake Engagement Test...................................178
			3.9.4 Accumulator Pre-Charge Test.....................................179
			3.9.5 Accumulator Pre-Charge Reset Instruction........................180
			3.9.6 Bleeding the Brake System.......................................181
			3.9.7 Brake Disc Wear Check...........................................182
	Section 4 : Steering System...................................................183
		4.1 General Description...................................................184
		4.2 Principles of Operation of Nain Priority Valve........................188
		4.3 Steering Valve (Orbitrol).............................................189
			4.3.1 Removal.........................................................190
			4.3.2 Main Priority Valve.............................................195
			4.3.3 Secondary Priority Valve (Optional).............................196
			4.3.4 Cushion Valve...................................................197
			4.3.5 Steering Cylinders..............................................198
			4.3.6 Multiple Check Valve............................................200
	Section 5 : Bucket Booms and Frame............................................201
		5.1 Load Handling System..................................................202
		5.2 Boom, Bellcrank and Bucket............................................203
			5.2.1General Description..............................................203
			5.2.2 Bucket..........................................................205
			5.2.3 Bucket Automatic Leveller.......................................206
			5.2.4 Boom Kickout (Optional).........................................207
		5.3 Frame Pivot Pins......................................................208
	Section 6 : Attachment Hydraulic System.......................................210
		6.1 General Description...................................................211
		6.2 Oil Circuit...........................................................212
			6.2.1 Attachment Hydraulic Circuit....................................212
		6.3 Hydraulic System Pump.................................................214
			6.3.1 Attachment/Steering Pump Testing and Repair.....................217
		6.4 Attachment Control Valve..............................................219
			6.4.1 General Description.............................................219
			6.4.2 Control Valve Operation.........................................224
			6.4.3 Pressure Relief Valve...........................................229
		6.5 Control Valve Controls................................................232
		6.6 Hydraulic Oil Reservoir...............................................233
		6.7 Cylinders.............................................................234
			6.7.1 Boom Raise Cylinders............................................234
			6.7.2 Bucket Roll Cylinder............................................234
		6.8 L.T.S. Anti-Pitch System (Option).....................................237
			6.8.1 Description.....................................................237
			6.8.2 Accumulator Discharge...........................................237
			6.8.3 L.T.S. Hydraulic Diagram........................................239
			6.8.4 L.T.S. System Operating Tests...................................240
			6.8.5 L.T.S. Accumulator Pre-Charge Check.............................241
			6.8.6 Accumulator Pre-Charge Reset Instructions.......................242
		6.9 Auxiliary Hydraulics Operation (Option)...............................243
	SECTION 7 ELECTRICAL SYSTEM...................................................244
		SAFETY RULES..............................................................245
		GENERAL LAY-OUT OF ELECTRICAL SYSTEM......................................246
		LOGIC BOARD AND CAB CONNECTIONS...........................................247
		FUSES.....................................................................248
		CONNECTORS................................................................249
		INDICATORS ON INSTRUMENT PANEL............................................253
		SWITCH PANEL..............................................................253
		TRANSMISSION CONTROL SELECTOR.............................................254
		STARTER SWITCH............................................................255
		MACHINE GROUPS ELECTRIC DIAGRAMS..........................................267
	SECTION 8 CAB.................................................................294
		GENERAL DESCRIPTION.......................................................295
		WINDSCREEN WIPERS AND WASHERS.............................................296
		HEATER....................................................................297
		GLASSES...................................................................298
		REPAIR....................................................................302
		AIR CONDITIONING UNIT.....................................................305
		TROUBLESHOOTING...........................................................313

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