Hitachi ZX27U, ZX30U, ZX35U Excavator Troubleshooting Technical Service Manual
261 pages · Publication ZX27U-30U-35U-TM
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What's inside
From the manual's own table of contents: 5 sections, 97 entries. See sample pages (PDF, 278 KB)
GENERAL12 topics
- Specifications
- Dimensions for Transportation
- Main Component
- Electrical System
- Relays
- Monitor and Switches
- Solenoid Valve Unit
- Engine
- Engine Accessories
- Hydraulic Component
- Filter
- Electrical Component
SYSTEM8 topics
- Outline
- Pilot Circuit
- Main Circuit
- (key Switch : OFF)
- (Key Switch : ON)
- Preheat Circuit (Key Switch : ON)
- Starting Circuit (Key Switch : START)
- Charging Circuit (Key Switch : ON)
COMPONENT OPERATION22 topics
- Main Pump (P1, P2)
- Horse Power Control Operation
- Swing Motor
- Parking Brake
- Valve Unit
- Swing Reduction Gear
- Hydraulic Circuit
- Arm Regenerative Valve
- Boom Anti-Drift Valve
- Flow Combiner Valve
- Flow Combining Selector Valve
- Main Relief Valve
- Overload Relief Valve
- Make-Up Valve
- Operation
- Travel Motor
- Travel Brake Valve
- Travel Reduction Gear
- Pilot Relief Valve
- Swing Bearing
- Center Joint
- Track Adjuster
OPERATIONAL PERFORMANCE TEST27 topics
- Preparation for Performance Tests
- Operational Performance Standard
- Engine Speed
- Engine Compression Pressure
- Valve Clearance
- Nozzle Check
- Injection Timing
- Travel Speed
- Track Revolution Speed
- Mistrack Check
- Travel Motor Leakage
- Swing Speed
- Swing Function Drift Check
- Swing Motor Leakage
- Maximum Swingable Slant Angle
- Swing Bearing Play
- Hydraulic Cylinder Cycle Time
- Dig Function Drift
- Control Lever Operating Force
- Control Lever Stroke
- Primary Pilot Pressure
- Secondary Pilot Pressure
- Main Relief Valve Set Pressure
- Overload Relief Valve Set Pressure
- Pump Driving Torque
- Swing Motor Drainage
- Travel Motor Drainage
TROUBLESHOOTING23 topics
- Introduction
- Diagnosing Procedure
- Troubleshooting A Procedure
- Engine System Troubleshooting
- Troubleshooting
- Swing System Troubleshooting
- Travel System Troubleshooting
- Blade System Troubleshooting
- Boom Swing System Troubleshooting
- Troubleshooting B Procedure
- Temperature Gauge
- Malfunction of Fuel Gauge
- Malfunction of Alternator Indicator
- Indicator
- Malfunction of Overheat Indicator
- Malfunction of Fuel Level Indicator
- Malfunction of Buzzer
- Malfunction of Hour Meter
- Maintenance
- Fuse Continuity Test
- Battery Voltage Check
- Voltage Check
- Continuity Check
Inside this manual
Real pages from this troubleshooting technical service manual (261 pages). Open the sample pages (PDF, 277 KB)
- Specifications, page 37: GENERAL / Specifications
- Diagram, page 113: COMPONENT OPERATION / Control Valve
- Troubleshooting, page 241: TROUBLESHOOTING / Troubleshooting B
This is a service manual
Here's how it compares to the other manual types.
Service manual
Factory repair procedures and technical information such as specifications, troubleshooting, and wiring and hydraulic diagrams, for the models and systems the manual covers. See What's inside for its topics.
Operator's manual
Safe operation, controls, maintenance schedules, lubrication points, inspections, and basic checks. Repair procedures are in the service manual.
Parts manual
Illustrated diagrams with factory part numbers for identifying components and ordering parts. Repair procedures are in the service manual.
Engine service manuals are sometimes sold separately, since certain machine models were offered with more than one engine option.
What it's used for
Factory manual for in-house farm and construction shop use. Straightforward, complete, and easy to follow. It contains the OEM information dealership service departments and parts counters use to diagnose problems, identify components, and perform maintenance or repairs correctly.
Service shops and owner/operators who repair their own equipment
Identifying correct parts and seeing how assemblies come apart and go back together
Keeping equipment running with less downtime
Factory manual, 261 pages
Quantity one is the manual described above.
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60-day returns
Free if the mistake is ours. A manual ordered in error must come back unopened in its shrink-wrap; you pay return shipping and a 20% restocking fee applies. Return policy
Other editions and similar models
Questions about model, serial number, engine coverage or contents? Contact us before purchasing and we'll help confirm it's the right manual. Please verify the manual type, machine model, serial number range and engine coverage before purchasing: manuals ordered in error carry a 20% restocking fee (return policy).