Name: Hitachi EX27U
Brand: Hitachi
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PART NO. EM1BU-NA3-1

Operator’s Manual

EX27U

EX35U

EX50U

Excavator

Table of Contents4
Machine Numbers7
Machine Type and Serial Number7
Product Identification Number (PIN)7
Safety9
Recognize Safety Information9
Understand Signal Words9
Follow Safety Instructions10
Prepare for Emergencies10
Wear Protective Clothing11
Protect against Noise11
Inspect Machine11
Use Handholds and Steps12
Adjust the Operator's Seat12
Fasten Your Seat Belt13
Move and Operate Machine Safely13
Operate Only from Operator's Seat14
Jump Starting14
Keep Riders off Machine14
Investigate Job Site Beforehand15
Protect against Falling Stones and Debris15
Provide Signals for Jobs Involving Multiple Numbers of Machines16
Confirm Direction of Machine to be Driven16
Drive Machine Safely17
Avoid Injury from Rollaway Accidents18
Avoid Injury from Back-Over and Swing Accidents19
Keep Person Clear from Working Area20
Never Position Bucket over Anyone20
Avoid Undercutting20
Avoid Tipping21
Never Undercut a High Bank21
Dig with Caution22
Operate with Caution22
Avoid Power Lines22
Do Not Use for Craning Operation23
Protect against Flying Debris23
Park Machine Safely23
Handle Fluids Safely - Avoid Fires24
Safety Transporting25
Practice Safe Maintenance26
Support Machine Properly27
Stay Clear of Moving Parts27
Warn Others of Service Work27
Prevent Parts from Flying28
Store Attachments Safely28
Prevent Burns29
Replace Rubber Hoses Periodically29
Avoid High-Pressure Fluids30
Prevent Fires31
Evacuating in Case of Fire32
Beware of Exhaust Fumes32
Avoid Heating Near Pressurized Fluid Lines33
Avoid Applying Heat to Lines Containing Flammable Fluids33
Remove Paint before Welding or Heating33
Prevent Battery Explosions34
Avoid Harmful Asbestos Dust34
Handle Chemical Products Safely35
Dispose of Waste Properly35
Safety Signs36
Operator's Station44
Pedals and Levers44
Monitor Panel and Switch Panel45
Key Switch46
Work Light Switch46
Monitor Panel47
Alternator Indicator47
Engine Oil Pressure Indicator47
Preheat Indicator48
Coolant Temperature Gauge and Overheat Indicator48
Fuel Gauge and Fuel Level Indicator49
Hour Meter49
Cab Heater50
Wiper/Washer Switch50
Opening and Closing Front Window51
Emergency Exit52
Tool Box and Operator's Manual Box53
Cab Door Release Lever53
Cab Light53
Adjusting the Operator's Seat54
Seat Belt (Ex27U, Ex35U)55
Seat Belt (Ex50U)56
Break-In57
Breaking in a New Machine57
Correct Break-In Procedures57
Operating the Engine59
Before Starting Engine59
Engine Speed Control Lever59
Starting the Engine60
Check Instruments after Starting60
Using Booster Batteries61
Stopping the Engine62
Fast Speed Travel Pedal64
Travel Alarm64
Traveling65
Operating on Soft Ground66
Raise One Track Using Boom and Arm66
Towing Machine a Short Distance67
Operating in Water or Mud68
Precautions for Traveling on Slopes69
Parking and Stopping on a Slope70
Parking the Machine70
Shifting the Control Lever Control Pattern73
Boom-Swing Pedal74
Optional Pedal75
Blade Lever77
Pilot Control Shut-Off Lever78
Warming up Operation80
Warming up in Cold Weather80
Precautions for Operations81
Avoid Tipping82
Operating Backhoe83
Grading Operation84
Avoid Abusive Operation84
Select Correct Track Shoes85
Operating Tips85
Object Handling86
Avoid Hitting Blade with Front Attachment87
Avoid Hitting Blade with Bucket87
Avoid Striking the Blade into a Rock87
Boom Cylinder May Hit Track88
Precautions for Installing Wide Bucket or Special Type Bucket88
Operate the Machine Safely89
Using Rubber Crawler90
Traveling and Other Cautions91
Emergency Stop Procedure to Lower Front Attachment92
Hydraulic Breaker Operating Tips93
Replacement of Hydraulic Oil and Filter Element95
Operating Hydraulic Crusher96
After Finishing Work97
Transporting99
Transporting by Road99
Transporting the Machine by Truck99
Precautions for Transporting Machines with Rubber Tracks101
Lifting the Entire Machine with Acrane103
Maintenance105
Correct Maintenance and Inspection Procedures105
Service Your Machine at Specified Intervals106
Check the Hour Meter Regularly106
Prepare Machine for Maintenance107
Hood and Access Covers108
Daily Inspection109
Daily Inspection Check List110
Periodic Replacement of Parts111
Maintenance Guide112
Greasing112
Front Joint Pins112
Bucket and Link Pins112
Precautions for Front Attachment and Blade Removal117
Swing Bearing118
Swing Internal Gear119
Control Lever Universal Joint120
Engine121
Change Engine Oil122
Replace Engine Oil Filters122
Transmission124
Hydraulic System126
Inspection and Maintenance of Hydraulic Equipment126
Check Hydraulic Oil Level127
Drain Hydraulic Tank Sump128
Change Hydraulic Oil129
Replace Hydraulic Oil Tank Filter133
Check Hoses and Lines138
Fuel System142
Drain Fuel Tank Sump143
Check Water Separator144
Replace Fuel Filter145
Air Cleaner146
Clean the Air Cleaner Element146
Cooling System148
Check Coolant Level149
Check and Adjust Fan Belt Tension150
Change Coolant151
Clean Radiator Core153
Electrical System154
Replacing Fuses156
Electical Socket157
Miscellaneous158
Check Bucket Teeth158
Replace Bucket160
Adjusting Bucket Linkage161
Check Track Sag (Rubber Crawler)162
Replace Rubber Track164
Check Track Sag (Steel Crawler)165
Check and Replace Seat Belt168
Check Fuel Injection Nozzles168
Check and Adjust Valve Clearance168
Check Injection Timing169
Measure Engine Compression Pressure169
Check Starter and Alternator169
Check Radiator Cap169
Check Tightening Torque of Bolts and Nuts170
Often-Replaced Parts173
Maintenance under Special Environmental Conditions174
Storing the Machine175
Removing the Machine from Storage176
Troubleshooting177
SPECIFICATIONS Specifications (Ex27U)179
Working Ranges (Ex27U)180
Shoe Types and Applications (Ex27U)181
Bucket Types and Applications (Ex27U)182
Specifications (Ex35U)183
Working Ranges (Ex35U)184
Shoe Types and Applications (Ex35U)185
Bucket Types and Applications (Ex35U)186
Specifications (Ex50U)187
Working Ranges (Ex50U)188
Shoe Types and Applications (Ex50U)189
Bucket Types and Applications (Ex50U)190
Index191

Brand	Hitachi
Model	EX27U
Category	Excavators
Language	English

Hitachi EX27U User Manual

Table of Contents

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Hitachi EX27U Specifications

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