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Gehl 503Z - User Manual

Gehl 503Z
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Compact Excavator
Beginning Serial Number: AC02471
503Z / 603
Form No.
918070
Revision F
Aug. 2011
Operator’s Manual
© 2011 All Rights Reserved. • Printed in USA
®

Table of Contents

Questions and Answers

  • T
    Tracy WilliamsSep 4, 2025
    Why does the water temperature light come on in my Gehl 503Z?
    • S
      Scott MartinSep 4, 2025
      If the water temperature display light comes on during operation of your Gehl Compact Excavator, the coolant level may be too low, so add coolant. Another possible cause is that the fan blades are rotating too slowly. Also, the air filter may be contaminated.
  • A
    Ashley KennedySep 18, 2025
    What should I do if my Gehl 503Z engine runs at over-speed?
    • A
      Alexander AndersonSep 18, 2025
      If the engine of your Gehl Compact Excavator runs at over-speed, reduce engine RPMs and stop the machine. Check/replace defective component(s) due to wiring harness error.
  • D
    David McbrideSep 16, 2025
    What does it mean when the fuel light comes on in my Gehl 503Z Compact Excavator?
    • G
      Gregory GloverSep 16, 2025
      If the fuel light comes on in your Gehl Compact Excavator, it indicates low fuel. Add fuel to resolve this issue.
  • J
    John VelezSep 14, 2025
    Why is my Gehl Compact Excavator leaking oil, coolant, or fuel?
    • E
      Edward CookSep 14, 2025
      If you notice oil, coolant, or fuel leakage under the engine of your Gehl Compact Excavator, check for loose hose connections and tighten them. Also, inspect seals or hoses for damage and replace them if necessary. After addressing leaks, check engine oil, engine coolant, and fuel levels, adding fluids as needed.
  • B
    Benjamin JohnsonSep 13, 2025
    Why are the hydraulic lines on my Gehl 503Z overheating?
    • L
      lewismoniqueSep 13, 2025
      If the hydraulic lines on your Gehl Compact Excavator are overheating, the hydraulic fluid level in the reservoir may be low, so add hydraulic fluid.
  • R
    Richard YorkSep 12, 2025
    Why is it difficult to rotate the swing frame on my Gehl 503Z Compact Excavator?
    • M
      Michael MillsSep 12, 2025
      If rotating the swing frame on your Gehl Compact Excavator is difficult or impossible, check if the swing lock pin is engaged and release it. Also, ensure that there is sufficient lubrication by lubricating the swing gear using the remote grease fitting.
  • D
    Dustin MullenSep 9, 2025
    What does it mean when the battery voltage light comes on in my Gehl Compact Excavator?
    • O
      orossSep 9, 2025
      If the battery voltage light comes on during operation of your Gehl Compact Excavator, the alternator may not be charging properly or is malfunctioning. Also, check for loose or corroded charging circuit connections and repair the charging circuit.
  • N
    Nicole MendozaSep 7, 2025
    Why won't my Gehl Compact Excavator travel straight?
    • R
      Robert ShafferSep 7, 2025
      If your Gehl Compact Excavator will not travel straight forward or backward, check for any foreign object jammed in the track and remove it. Also, the track tension may be unequal and needs adjustment.
  • J
    Jack WhiteSep 5, 2025
    Why is my Gehl Compact Excavator losing hydraulic fluid?
    • D
      danny82Sep 6, 2025
      If you're experiencing hydraulic fluid losses from the hydraulic system of your Gehl Compact Excavator, check for loose hose fittings and tighten them. Also, inspect seals, hoses, or lines for damage and replace them as needed.
  • E
    egordonAug 20, 2025
    Why won't my Gehl 503Z Compact Excavator engine start?
    • W
      williamwyattAug 21, 2025
      If your Gehl Compact Excavator's engine won't start, several factors could be at play. First, ensure you have sufficient fuel in the tank and that air is bled from the fuel system. Check the battery to ensure it has sufficient power, charging or replacing it if necessary. A contaminated fuel filter can also prevent starting, so clean it. Other potential issues include incorrect engine oil or fuel grade (replace with the proper grade), loose or corroded starter circuit connections (repair the circuit), a malfunctioning fuel injector (repair the injector), a faulty glow plug system (replace the system), incorrect engine valve clearance (adjust the valve clearance), or a malfunctioning starter/pinion (repair the starter/pinion).

Summary

CHAPTER 1 - GENERAL INFORMATION

503 Z General Specifications

Detailed specifications and dimensions for the 503Z model excavator.

603 General Specifications

Detailed specifications and dimensions for the 603 model excavator.

Load Diagrams

Permissible load charts for the 503Z standard dipper arm.

CHAPTER 2 - SAFETY

SAFETY ALERTS

Explanation of safety alert symbols and signal words used in the manual.

GENERAL SAFETY RULES

Essential rules and recommendations for safe operation and operator qualifications.

MANDATORY SAFETY SHUTDOWN PROCEDURE

Step-by-step procedure for safely shutting down the machine before leaving.

OPERATION SAFETY

General safety guidelines and precautions for operating the machine.

Before Operation

Precautions and checks to perform before starting machine operation.

During Operation

Safety guidelines to follow while the machine is in operation.

FIRE HAZARDS

Information on potential fire hazards related to machine components and operation.

MAINTENANCE SAFETY

Safety rules and precautions for performing maintenance on the machine.

Battery Electrolyte and Explosive Gas Hazard

Precautions related to battery acid, explosive gases, and first aid.

Jump-starting or Charging the Battery

Safe procedures for jump-starting or charging the machine's battery.

CHAPTER 3 - OPERATION

OPERATING CONTROLS

Overview of the machine's operating controls and safety features.

Ignition Key Switch

Description of the ignition key switch positions and their functions.

Battery Disconnect Switch

Location and operation of the battery disconnect switch for electrical lockout.

Travel Controls

Instructions on operating the machine's travel controls for forward, reverse, and turning.

Tilting the Cab or Canopy

Procedure for safely tilting the cab or canopy up and down.

SAE Operating Controls

Description of SAE control configuration for joysticks and functions.

ISO Operating Controls

Description of ISO control configuration for joysticks and functions.

Boom Swivel;Auxiliary Hydraulics Pedal

Operation of the boom swivel and auxiliary hydraulics using the pedal.

Dozer Blade Controls

How to operate the dozer blade using the control pedal/lever.

Seat Belt

Importance and proper use of the seat belt for operator safety.

Mounting;Removing Buckets

Safety precautions and procedures for mounting and removing buckets.

Auxiliary Hydraulics Connections

Procedure for connecting and disconnecting auxiliary hydraulic quick couplings.

MACHINE OPERATION

General procedures and checks for operating the machine.

Pre-Operation Checklist

Daily and 12-hour checks to ensure the machine is ready for operation.

Engine Start and Stop

Basic procedures for starting and stopping the machine's engine.

Engine Start Procedure

Detailed steps for starting the engine, including indicator checks.

After Starting;During Operation

Checks to perform after startup and during operation for proper function.

Engine Shut Down

Procedure for safely shutting down the engine.

Mandatory Safety Shutdown Procedure

Detailed steps for safely shutting down the machine before leaving.

Travel

Safety warnings and instructions for operating the machine's travel functions.

Machine Operation

Details on operating specific machine functions like joysticks and brakes.

CHAPTER 4 - MAINTENANCE

Maintenance Safety

Critical safety rules and precautions to follow during maintenance procedures.

MAINTENANCE SCHEDULE

Recommended maintenance intervals for various service activities.

Checking Engine Oil Level

Step-by-step guide to checking the engine oil level using the dipstick.

Changing Engine Oil and Filter

Procedure for changing the engine oil and oil filter.

Filling the Fuel Tank

Procedure for filling the fuel tank with diesel fuel.

Checking Coolant Level

Step-by-step guide to checking the engine coolant level.

Using a Booster Battery (Jump-Starting)

Safe procedures for jump-starting the machine using a booster battery.

Checking Hydraulic Oil Level

Step-by-step guide to checking the hydraulic oil level.

CHAPTER 5 - TROUBLESHOOTING

ENGINE

Troubleshooting guide for engine-related problems like starting and running issues.

ENGINE ERROR CODES

Information on engine error codes, diagnostic examples, and their meanings.

Gehl 503Z Specifications

General IconGeneral
BrandGehl
Model503Z
CategoryCompact Excavator
LanguageEnglish

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