Part of the Hitachi manuals.
Printed by Hitachi under document number EM1CC-1-1, this 260-page Hitachi Zaxis 75US operator manual PDF is the factory operator's book for the ZAXIS 75US hydraulic excavator. Maintenance fills close to a third of it, setting out the inspection guide, service intervals and filter changes, while the controls chapters explain the monitor panel, pilot control shut-off lever, travel mode switch and power mode before you move a track. Troubleshooting charts sort engine, electrical and hydraulic faults, and the transport section covers trailer loading, the machine lifting procedure and road travel. Plan on 75 L (19.8 US gal) for a hydraulic oil change and 12.0 L (3.2 US gal) of engine oil, then turn the pilot filter case down to 20 to 29 N·m. Half-remembered fill figures cost a crew its morning. Text is searchable, chapters are bookmarked, and you buy it once and keep it for the life of this machine.
What's Inside This Hitachi ZAXIS 75US Operator Manual
| System | Pages | Key Topics |
|---|---|---|
| Machine Numbers | 3-7 | Machine Type, Serial Number, Product Identification Number, Engine Type, Travel Motor Type, Hydraulic Pump Type |
| Safety | 8-37 | Recognize Safety Information, Understand Signal Words, Follow Safety Instructions, Prepare for Emergencies, Wear Protective Clothing, Protect Against Noise, Inspect Machine |
| Safety Signs | 38-47 | Explosion Hazard, Crush Hazard, Flying Plug Hazard, Electrical Hazard, Burn Hazard, Falling Window Hazard |
| Components Name | 48 | Bucket, Arm, Boom, Fuel Tank, Hydraulic Oil Tank, Engine |
| Operator's Station | 49-95 | Monitor Panel, Air Conditioner Operation |
| Break-In | 96-97 | Engine Operation, Fluid Leaks, Front Joint Pins, Hardware Torque |
| Operating the Engine | 98-105 | Pre-Start Inspection, Engine Starting, Cold Weather Starting, Booster Batteries, Engine Stopping |
| Driving the Machine | 106-115 | Travel Pedals, Travel Levers, Travel Mode Switch, Travel Alarm, Soft Ground Operation, Slope Travel |
| Operating the Machine | 116-131 | Horn, Control Levers, Pilot Control Shut-Off Lever, Engine Speed Control, Auto-Idle, Power Mode |
| Transporting | 132-137 | Trailer Loading, Trailer Unloading, Machine Lifting Procedure, Transport by Road |
| Maintenance | 138-217 | Correct Maintenance and Inspection Procedures, Maintenance Guide |
| Maintenance Under Special Environmental Conditions | 218-219 | Muddy Soil, Dusty Atmosphere, Rocky Ground, Freezing Weather |
| Storage | 220-221 | Hydraulic Cylinders, Batteries, Alternator Belt, Fan Belt, Fuel Tank |
| Troubleshooting | 222-233 | Engine Troubleshooting, Electrical System Troubleshooting, Hydraulic System Troubleshooting |
| Specifications | 234-237 | Engine, Bucket Capacity, Operating Weight, Ground Pressure, Swing Speed, Travel Speed |
| Optional Attachments and Devices | 238-257 | Breaker Operation, Hydraulic Crusher |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Engine Oil Change Capacity | 12.0 L (3.2 US gal) | p. 146 |
| Hydraulic Oil Change Capacity | 75 L (19.8 US gal) | p. 147 |
| Engine oil capacity | 12.0 L | p. 156 |
| Hydraulic oil tank capacity | 200 liters | p. 167 |
| Pilot Oil Filter tightening torque | 20 to 29 N·m | p. 170 |
| Track sag specifications | 210 to 245 mm (8.3 to 9.0 in) | p. 203 |
| Tightening torque for track valve (1) | 147 N·m (15 kgf·m, 108 lbf·ft) | p. 204 |
| Swing Internal Gear Capacity | 3.5 L | p. 153 |
| Fuel Tank Capacity | 89 L | p. 176 |
| Hydraulic Tank Capacity | 200 L | p. 166 |
| Track Sag Specification | 210 to 245 mm | p. 203 |
| Operating Weight (Standard) | 7100 kg | p. 234 |
Hitachi ZAXIS 75US Common Problems This Manual Covers
Hitachi Zaxis 75US engine will not start on cold mornings after sitting overnight in the yard
Check the no-start causes in the engine troubleshooting chart on page 222 before you swap any parts. Follow the cold weather starting steps in Operating the Engine on page 98. If the batteries are weak, connect booster batteries in the order that section gives. Make sure the tank has fuel; page 176 lists its capacity as 89 L.
Manual Section: Engine Troubleshooting p. 222Engine temperature climbing into overheat while digging all day in dusty conditions
Check the overheating causes listed in the engine troubleshooting chart on page 223 and work through them in order. When the machine runs in heavy dust, follow the dusty atmosphere maintenance guidance on page 218. Verify the engine oil level, and when you change the oil, refill with 12.0 L as listed on page 156.
Manual Section: Engine Troubleshooting p. 223Engine cranks slowly and charging indicator stays lit on the monitor panel after startup
Check the slow crank and charging indicator causes in the electrical system troubleshooting chart. Inspect the alternator belt. If the machine sat parked for weeks, review the battery and alternator belt care in the Storage section on page 220. To get it running, use booster batteries following the Operating the Engine procedure on page 98.
Manual Section: Electrical System TroubleshootingHydraulic oil foaming and boom, arm, and bucket functions running slow under load
Check the oil level in the hydraulic oil tank. Page 166 says it holds about 200 liters up to the specified level. Then work through the slow function and foaming causes in the hydraulic system troubleshooting chart. When the maintenance schedule calls for an oil change, refill with 75 L (19.8 US gal) as listed on page 147.
Manual Section: Hydraulic System TroubleshootingTrack chain hanging loose and sagging past spec when inspecting the undercarriage
Measure track sag following page 203 and compare it against 210 to 245 mm (8.3 to 9.0 in). Adjust track tension until the sag falls inside that range. Then turn valve (1) clockwise and tighten it to 147 N·m (108 lbf·ft) per page 204. Check both tracks before you put the machine back to work.
Manual Section: Maintenance p. 203Control levers not responding or not returning to neutral after engine start
Verify the pilot control shut-off lever position following the Operating the Machine section on page 116 before you check anything else. Then work through the hard movement, no response, and neutral return causes in the control levers troubleshooting chart. If the pilot oil filter is due for service, replace it and tighten the filter case to 20 to 29 N·m per page 170.
Manual Section: Control Levers TroubleshootingFrequently Asked Questions
How do you reset the trip meter on a Hitachi ZAXIS 75US?
To reset the trip meter, press the display selection switch to display either Trip Meter 1 or 2 on the LCD. Then, press the SET switch to reset the currently indicated hours to the default set-hour (e.g., 35.2 resets to 50.0). p. 55
What engine and ground pressure does the Hitachi ZAXIS 75US have?
The ZAXIS 75US is equipped with an ISUZU A-4JG1 engine producing 40.5 kW (55 PS) at 1900 min-1 (rpm). The ground pressure is 34 kPa (0.34 kgf/cm2). p. 234
What are the fuel filter replacement specifications for the Hitachi ZAXIS 75US?
The fuel filter should be replaced every 500 hours. After replacing the cartridge filter, you must bleed air from the fuel system to ensure proper engine operation. p. 179
What are the engine oil filter replacement specs for the Hitachi ZAXIS 75US?
The engine oil filter should be replaced every 500 hours. When installing a new filter, apply a thin film of clean oil to the gasket and tighten it 1 1/4 turns after the gasket touches the contact area. p. 156
What is the tightening torque for the engine cushion rubber mounting nut on the Hitachi ZAXIS 75US?
The engine cushion rubber mounting nut (14 mm diameter) should be tightened to 140 N·m (14.3 kgf·m, 103 lbf·ft). p. 210
How quickly can I access this Hitachi Zaxis 75US manual after buying?
One searchable PDF covering 260 pages, delivered instantly. No disc, no shipping, no waiting on the post.
Is this Hitachi Zaxis 75US Operator Manual printable?
Yes. Print the sections you need to take out to the shop for your own use. Standard letter or A4 paper works.
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