Hitachi ZAXIS 30U-5N Operator's Manual page 7

Layout ..................................................................................................7-3
Maintenance Guide Table .............................................................7-4
Preparations for Inspection and Maintenance .....................7-6
Access Covers ....................................................................................7-7
Maintenance Guide ..................................................................... 7-10
Periodic Replacement of Parts ................................................. 7-14
Kind of Oils ...................................................................................... 7-15
A. Greasing ...................................................................................... 7-19
Front Joint Pins ........................................................................ 7-19
Bucket ......................................................................................... 7-19
Swing Post and Others .......................................................... 7-19
Blade Pins ................................................................................... 7-21
Swing Bearing .......................................................................... 7-22
Swing Internal Gear................................................................ 7-23
Control Lever Universal Joint .............................................. 7-23
B. Engine .......................................................................................... 7-24
Engine Oil Level ....................................................................... 7-24
Change Engine Oil ................................................................. 7-25
Replace Engine Oil Filter ....................................................... 7-25
C. Transmission .............................................................................. 7-28
Travel Reduction Gear ........................................................... 7-28
D. Hydraulic System ..................................................................... 7-31
Inspection and Maintenance of Hydraulic
Equipment ........................................................................... 7-31
Check Hydraulic Oil Level .................................................... 7-35
Drain Hydraulic Oil Tank Sump .......................................... 7-36
Change Hydraulic Oil ............................................................. 7-37
Suction Filter Cleaning .......................................................... 7-37
Replace Full-Flow Filter ......................................................... 7-41
Replace Pilot Oil Filter Element .......................................... 7-43
Check Hoses and Lines ......................................................... 7-45
E. Fuel System ................................................................................ 7-52
Recommended Fuel ............................................................... 7-52
Check Fuel Level ...................................................................... 7-53
Drain Fuel Tank Sump ............................................................ 7-54
Check Water Separator (ZX30U-5N, 35U-5N) ................ 7-55
Bleed Air from Fuel System (ZX30U-5N, 35U-5N) ........ 7-55
Replace Fuel Main Filter Element ...................................... 7-58
Replace Fuel Pre-Filter Element (ZX50U-5N,
60USB-5N) ........................................................................... 7-59
Check Fuel Hoses .................................................................... 7-60
F. Air Cleaner ................................................................................... 7-61
Clean Air Cleaner Outer Element ...................................... 7-61
Replace Air Cleaner Outer and Inner Elements ............ 7-61
Replace Air Cleaner Inner Element (Optional) .............. 7-61
G. Cooling System ........................................................................ 7-63
Check Coolant Level .............................................................. 7-64
Check and Adjust Fan Belt Tension .................................. 7-65
Change Coolant ....................................................................... 7-68
Clean Radiator/Oil Cooler Core .......................................... 7-70
Clean Air Conditioner Condenser .................................... 7-71
Clean Air Conditioner Condenser Front Screen ........... 7-71
Clean Fuel Cooler (ZX50U-5N, 60USB-5N) ..................... 7-71
H. Electrical System ...................................................................... 7-72
Batteries ..................................................................................... 7-72
Check Electrolyte Specific Gravity .................................... 7-75
CONTENTS
Replacing Fuses ....................................................................... 7-76
I. Miscellaneous ............................................................................. 7-77
Check and Replace Bucket Teeth ...................................... 7-77
Change Bucket ......................................................................... 7-79
Adjust Track Sag (Rubber Crawler) and Check for
Damage ................................................................................ 7-80
Check Rubber Track for Damage ....................................... 7-80
Replace Rubber Crawler ...................................................... 7-82
Removing Rubber Crawler .................................................. 7-82
Installing Rubber Crawler .................................................... 7-83
Check Track Sag (Steel Crawler) (Optional) .................... 7-84
Converting the Track ............................................................. 7-86
Check and Replace Seat Belt ............................................... 7-87
Check Air Conditioner (Cab Equipped Machine) ......... 7-88
Clean and Replace Heater / Air Conditioner Filter ...... 7-91
Clean Circulating Air Filter ................................................... 7-91
Replace Circulating Air Filter ............................................... 7-91
Clean Fresh Air Filter .............................................................. 7-93
Replace Fresh Air Filter .......................................................... 7-93
Clean Fresh Air Filter .............................................................. 7-94
Replace Fresh Air Filter .......................................................... 7-94
Clean Cab Floor........................................................................ 7-95
Check, Clean and Function Check of Injection
Nozzle (ZX30U-5N, 35U-5N) .......................................... 7-96
Check, Clean and Function Check Injector
(ZX50U-5N, 60USB-5N) .................................................... 7-96
Inspect and Adjust Valve Clearance ................................ 7-96
Check and Adjust Injection Timing (ZX30U-5N,
35U-5N) ................................................................................. 7-96
Measure Engine Compression Pressure ......................... 7-96
Check Starter and Alternator .............................................. 7-96
Check Crankcase Breather .................................................. 7-96
Check Radiator Cap ............................................................... 7-97
Clean EGR Cooler (ZX50U-5N/60USB-5N) ...................... 7-97
Function Check Intake Throttle Valve (ZX50U-5N/
60USB-5N) ............................................................................ 7-97
Check, Clean and Function Check EGR Valve
(ZX50U-5N/60USB-5N) .................................................... 7-97
Tightening and Retighten Torque of Bolts and
Nuts ........................................................................................ 7-98
J. Muffler Filter (ZX50U-5N, 60USB-5N)...............................7-104
Check and Clean Filter Element of Muffler Filter .......7-104
Check and Clean Muffler Filter .........................................7-104
MAINTENANCE UNDER SPECIAL ENVIRONMENTAL
CONDITIONS ................................................................. 9-1
Maintenance Under Special Environmental Conditions ...9-1
STORAGE ..................................................................... 10-1
Storing the Machine .................................................................... 10-1
TROUBLESHOOTING ................................................... 11-1
Troubleshooting ........................................................................... 11-1
SPECIFICATIONS ......................................................... 12-1
Std. Specification .......................................................................... 12-1
Working Ranges ............................................................................ 12-2
Shoe Types and Applications ................................................... 12-3