Hitachi ZX27U-2 User Manual (English)

Questions and Answers:

J
jameswolfAug 19, 2025
How to troubleshoot a Hitachi Excavators engine that does not start?
- J
  jenniferingramAug 19, 2025
  If your Hitachi Excavator's engine won't start, several issues could be the cause. It could be due to a dead battery, in which case you should recharge or replace it. A faulty starter might also be the culprit, requiring repair or replacement. Check for loose or corroded connections and clean/tighten them. If the engine is too cold, preheat it by warming up the coolant. Air in the fuel system can also prevent starting, so thoroughly bleed the air. Make sure there is enough fuel, and if the fuel filter is restricted, clean or replace it.
A
Ashley CopelandAug 21, 2025
Why does my Hitachi ZX27U-2 engine overheat?
- T
  Thomas KellerAug 21, 2025
  If your Hitachi Excavator engine overheats, it could be due to several reasons. First, check the coolant level and look for any leaks, adding coolant and repairing any leaks as needed. Next, inspect the fan belt for looseness or oil contamination; adjust or replace it accordingly. Also, inspect the radiator fins for clogging or bending, clean or repair them. Finally, a malfunctioning thermostat can cause overheating, so consider replacing it.
K
Kathy QuinnAug 23, 2025
What to do if my Hitachi ZX27U-2 Excavators engine stalls?
- R
  robincarpenterAug 25, 2025
  If your Hitachi Excavator engine stalls, it could be due to a lack of fuel in the fuel tank, so refuel. Another potential cause is air in the fuel system, in which case you should re-tighten the connections and bleed the system.
G
Gregory ColemanAug 26, 2025
Why won't the starter rotate on my Hitachi ZX27U-2?
- D
  Dr. Daniel TuckerAug 26, 2025
  If the starter on your Hitachi Excavator doesn't rotate, it could be due to a few reasons. A harness failure could be the cause, so inspect and repair it. Low battery power can prevent the starter from working, so charge the battery. Loose or corroded battery connections can also be the problem, so clean and tighten them. Lastly, a faulty key switch could be the issue, requiring replacement.
E
Erin DavisAug 27, 2025
Why is my Hitachi ZX27U-2 Excavators engine knocking?
- C
  Christina GloverAug 28, 2025
  If your Hitachi Excavator engine knocks or runs irregularly, the fuel filter might be restricted, so clean or replace it. Air in the fuel system could also be the cause, so re-tighten the connections and bleed the system. Another possible reason is a restricted air cleaner, so clean or replace the element.
R
Rick WrightAug 30, 2025
What causes low engine oil pressure in Hitachi ZX27U-2?
- A
  Angela MorganAug 30, 2025
  If you notice low engine oil pressure in your Hitachi Excavator (the engine oil pressure indicator comes on), it could be due to insufficient engine oil, so add oil. Check for oil leaks at the connections and repair them if necessary. It could also be due to a faulty oil pressure switch, so replace it.
R
Richard FarmerSep 1, 2025
Why does the alternator indicator stay on in my Hitachi ZX27U-2?
- M
  Meghan HunterSep 1, 2025
  If the alternator indicator on your Hitachi Excavator doesn't turn off after starting the engine, it could be due to alternator failure, so replace it. Another possible cause is harness failure, in which case you should inspect and repair it.
J
Jenna StewartSep 3, 2025
Why aren't the monitor indicators working on my Hitachi ZX27U-2?
- T
  Thomas CantuSep 3, 2025
  If the monitor indicators on your Hitachi Excavator don't come on, or the gauges don't operate, it could be due to a blown fuse, so replace it. A sensor failure could also be the cause, so replace the sensor. Another possibility is harness failure, so inspect and repair the harness. Finally, burned indicator bulbs could be the issue, so replace them.
B
Bianca FerrellSep 5, 2025
Why does my Hitachi Excavators not travel smoothly?
- K
  Kim FletcherSep 5, 2025
  If your Hitachi Excavator doesn't travel smoothly, there are several potential causes: * The track might be too tight (sag), so adjust the track sag. * Foreign matter, like rocks, might be stuck in the tracks, so remove it. * A counterbalance valve failure could be the problem, so replace it. * The travel motor performance might have dropped, so replace it.
A
Angelica RuizSep 7, 2025
What causes a Hitachi ZX27U-2 to mistrack?
- Q
  qallenSep 7, 2025
  If your Hitachi Excavator is mistracking, it could be due to unequal track sag on both sides, so adjust the track sag properly and equally on both sides. Another cause could be hydraulic pump performance drop, so replace the pump. An oil leak inside the control valve might also be the issue, so replace the control valve.

Hitachi ZX27U-2 Specifications

General

Brand	Hitachi
Model	ZX27U-2
Category	Excavators
Language	English

Summary

SAFETY

Recognize Safety Information

Understand and follow safety alert symbols and recommended practices.

Understand Signal Words

Learn the meaning of DANGER, WARNING, CAUTION, IMPORTANT, and NOTE signals.

Follow Safety Instructions

Read and follow all safety signs and messages; ensure signs are maintained.

Prepare for Emergencies

Wear Protective Clothing

Wear appropriate fitting clothing and safety equipment for the job.

Inspect Machine

Adjust the Operator's Seat

Ensure Safety Before Rising From or Leaving Operator's Seat

Secure the machine (lower attachment, lock lever) before leaving the operator's seat.

Fasten Your Seat Belt

Always wear the seat belt securely fastened when operating the machine.

Move and Operate Machine Safely

Be aware of surroundings, check for bystanders, and use alarms/horns for safe movement.

Operate Only From Operator's Seat

Start and operate the engine only while seated in the operator's seat.

Precautions for Operations

Ensure work site safety, wear proper clothing, and keep bystanders clear.

Investigate Job Site Beforehand

Assess job site conditions to prevent tip-overs, collapses, and ensure safe operation.

Drive Machine Safely

Select flat routes, check bridges, avoid obstructions, and use caution on slopes.

Avoid Injury from Rollaway Accidents

Avoid Injury from Back-Over and Swing Accidents

Always look around before backing up or swinging; keep bystanders clear.

Keep Person Clear from Working Area

Ensure no persons are in the operating or swing radius area to prevent contact.

Never Position Bucket Over Anyone

Never lift, move, or swing the bucket over anyone to avoid injury or damage.

Avoid Tipping

Be careful on grades, prepare area flat, keep bucket low, reduce speed, and avoid changing direction.

Never Undercut a High Bank

Dig with Caution

Avoid Power Lines

Maintain safe distances from electric lines, considering wet ground conditions.

Do Not Use for Craning Operations

Never use the machine for craning operations; it is designed only for excavation and loading.

Park Machine Safely

Park on solid level surface, lower attachments, lock lever, turn off auto-idle, and secure doors.

Handle Fluids Safely – Avoid Fires

Handle fuel and lubricants with care; store flammable fluids away from fire hazards.

Safety Transporting

Observe local regulations, use appropriate transport, and have a signal person for loading/unloading.

Practice Safe Maintenance

Coordinate procedures, park safely, keep area clean, use tags, and wait for components to cool.

Warn Others of Service Work

Support Machine Properly

Never work on a lifted machine or attachment without securing it with stays or blocks.

Stay Clear of Moving Parts

Keep body parts, clothing, and hair away from moving parts to prevent entanglement.

Prevent Parts from Flying

Prevent Burns

Handle hot fluids and surfaces with care; wait for components to cool before maintenance.

Replace Rubber Hoses Periodically

Avoid High-Pressure Fluids

Relieve pressure before disconnecting lines; protect hands and body from high-pressure fluids.

Prevent Fires

Check for oil leaks, tighten connections, and ensure electrical connections are secure to prevent fires.

Precautions for Handling Flammables

Evacuating in Case of Fire

Follow procedures for safe evacuation from the machine in case of fire.

Beware of Exhaust Fumes

Precautions for Welding and Grinding

Avoid Heating Near Pressurized Fluid Lines

Avoid Applying Heat to Lines Containing Flammable Fluids

Prevent Battery Explosions

Keep sparks away from batteries, avoid charging frozen batteries, and ensure terminals are tight.

Handle Chemical Products Safely

Safety Signs

Familiarize yourself with all safety signs on the machine and keep them clean and intact.

OPERATOR’S STATION

Pedals, Levers, and Monitor Panel Overview

Familiarize with the layout and function of the operator's station controls and displays.

Key Switch and Switch Panel

Monitor Panel Indicators and Gauges

Learn the meaning of indicators and gauges for machine status and system alerts.

Liquid Crystal Display (LCD) Operation

Understand the LCD display for hour meter, trip meter, and how to select displays.

Emergency Exit Procedures

Follow procedures for safe emergency escape from the operator's cab if doors are obstructed.

Seat Belt and Cab Light Operation

Ensure seat belt is used and check cab light operation for safety.

BREAK-IN

Breaking in New Machine

Perform break-in operation carefully to ensure machine's service life and performance.

OPERATING THE ENGINE

Before Starting Engine

Perform pre-start checks including pilot control, levers, indicator bulbs, and seat adjustment.

Starting Engine Procedures

Follow steps to start the engine in ordinary and cold weather conditions.

Check Machine After Starting Engine

Stopping the Engine

DRIVING THE MACHINE

Travel Levers and Pedals Operation

Precautions for Traveling on Slopes

Parking and Stopping on Slopes

OPERATING THE MACHINE

Control Lever Patterns (ISO, H-Pattern, SAE-Backhoe)

Precautions for Blade Operation

Pilot Control Shut-Off Lever Function

Warming Up Operation Procedures

Operating Backhoe Techniques

Avoid Driving Bucket Teeth Into Ground

Avoid Striking with Bucket

Avoid Other Than Specified Machine Operations

Precautions for Lifting Work

Hydraulic Breaker and Crusher Operations

Emergency Boom Lowering Procedure

TRANSPORTING

Transporting by Road

Trailer Loading/Unloading Procedures

Loading and Securing Machine for Transport

Unloading and Lifting Machine with Crane

MAINTENANCE

Procedures and Daily Inspection

Follow general maintenance procedures and perform daily inspections for machine health.

Periodic Replacement of Parts

Maintenance Guide and Lubrication Points

Recommended Oils and Lubricants

Engine Oil and Filter Service

Check engine oil level daily and change oil/filter at specified intervals for engine health.

Transmission and Hydraulic System Maintenance

Fuel System Maintenance

Air Cleaner Element Service

Cooling System Maintenance

Electrical System: Batteries

Check Tightening Torque of Bolts and Nuts

Track Sag Adjustment and Crawler Maintenance

TROUBLESHOOTING

Engine Troubleshooting

Diagnose and resolve common engine problems like starting issues, stalling, and overheating.

Electrical System Troubleshooting

Hydraulic System Troubleshooting

Diagnose and resolve hydraulic system problems like insufficient power, travel, and swing issues.

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