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JLG G5-18A Service Manual

JLG G5-18A
192 pages
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An Oshkosh Corporation Company
Service Manual
Models
G5-18A
&
2505
31200361
Revised
January 15, 2018

Table of Contents

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JLG G5-18A Specifications

General IconGeneral
Maximum Lift Capacity5, 500 lbs
Maximum Lift Height18 ft
Engine ManufacturerDeutz
Engine ModelTD 2.9 L4
Horsepower74 hp
Tire TypePneumatic
Weight2, 900 lbs

Summary

Effectivity Page

Section 1: Safety Practices

1.1 Introduction

Provides general directions for service and repair procedures.

1.2 Disclaimer

States JLG's right to make changes and improvements to products.

1.3 Operation & Safety Manual

Outlines requirements for operating the machine safely.

1.4 Do Not Operate Tags

Procedures for using "Do Not Operate" tags for safety.

1.5 Safety Information

General guidelines to avoid death or injury, including emergency info.

1.5.1 Safety Alert System and Signal Words

Explains DANGER, WARNING, and CAUTION signal words.

1.6 Safety Instructions

General safety statements for maintenance and specific task procedures.

1.6.1 Personal Hazards

Safety gear and lifting procedures for personal protection.

1.6.2 Equipment Hazards

Safe practices for lifting and using equipment.

1.6.3 General Hazards

Hazards related to solvents, housekeeping, first aid, and cleanliness.

1.6.4 Operational Hazards

Hazards related to engine, ventilation, slopes, fluids, and pressure.

1.7 Safety Decals

Importance of checking and maintaining safety decals on the machine.

Section 2: General Information and Specifications

2.1 Replacement Parts and Warranty Information

Information on obtaining replacement parts and warranty registration.

2.2 Specifications

Details on travel speed, hydraulic, electrical, engine, and tire specifications.

2.3 Fluids, Lubricants and Capacities

Lists required fluids, lubricants, and their capacities for the machine.

2.4 Maintenance Schedules

Outlines required maintenance at different hour intervals.

2.5 Lubrication Schedule

Details the lubrication points and schedule for the machine.

2.6 Thread Locking Compound

Lists JLG P/N and ND Industries equivalents for thread locking compounds.

2.7 Torque Charts

Provides torque values for SAE and Metric fasteners.

2.8 Hydraulic Connection Assembly and Torque Specifications

Procedures for assembling hydraulic connections and their torque specifications.

2.8.1 Definitions

Defines various types of hydraulic threads, tubes, and hoses.

2.8.2 - 2.8.13 Hydraulic Fitting Assembly Instructions

Step-by-step guides for assembling various hydraulic fittings.

2.8.14 Double Wrench Method

Explains the double wrench method for hose and connector rotation.

2.8.15 FFWR and TFFT Methods

Details FFWR and TFFT methods for tightening fittings.

2.8.16 Adjustable Stud End Assembly

Steps for assembling adjustable stud end connections.

2.8.17 O-ring Installation (Replacement)

Guidance on proper installation and replacement of O-rings.

Section 3: Boom System

3.1 Boom System Component Terminology

Identifies and explains major components of the boom system.

3.2 Boom System - Two Section Boom

Describes the operation of the two-section boom system.

3.3 Boom Assembly Maintenance

Covers the maintenance procedures for the boom assembly.

3.3.1 - 3.3.12 Boom Section Removal and Installation

Detailed procedures for removing and installing boom sections and related components.

3.4 Boom Wear Pads

Information on inspection, replacement, and lubrication of boom wear pads.

3.5 Quick Attach Assembly

Procedures for connecting and removing quick attach devices.

3.6 Forks

Inspection guidelines for forks before attachment to the carriage.

3.7 Troubleshooting

Common boom problems, their causes, and remedies.

Section 4: Cab and Covers

4.1 Operator’s Cab and Covers Component Terminology

Identifies and explains the components of the machine's cab and covers.

4.2 Operator’s Cab

Describes the cab structure, safety features, and general contents.

4.3 Cab Components

Details the removal and installation of various cab components.

4.3.1 - 4.3.3 Steering, Brakes, and Throttle Controls

Procedures for servicing steering wheel, column, brake, and throttle pedal.

4.3.4 - 4.3.8 Joystick, Wiper, Washer, and Heater/Defroster Systems

Procedures for servicing joystick, wipers, washer, and heater/defroster.

4.4 Cab Removal

Step-by-step instructions for removing the machine's cab.

4.5 Cab Installation

Step-by-step instructions for installing the machine's cab.

Section 5: Axles, Drive Shafts, Wheels, and Tires

5.1 Axle, Drive Shaft and Wheel Component Terminology

Identifies major components of axles, drive shafts, wheels, and tires.

5.2 General Information

General guidelines for inspecting, maintaining, and servicing axles and drive shafts.

5.3 Axle Assemblies

Information and procedures related to axle assemblies.

5.3.1 - 5.3.6 Axle Specifications, Service, Removal, and Installation

Details on axle serial numbers, specs, internal service, maintenance, removal, and installation.

5.3.7 Axle Assembly and Drive Shaft Troubleshooting

Identifies common axle and drive shaft problems, causes, and remedies.

5.3.8 Steering System Purge Procedure

Step-by-step guide to purge air from the steering system.

5.4 Drive Shafts

Procedures for drive shaft inspection, maintenance, removal, and installation.

5.5 Wheels and Tires

Guidelines for selecting, removing, and installing wheels and tires.

5.6 Steering Adjustment

Instructions for adjusting steering angle.

5.7 Brakes

Information on brake disk inspection.

Section 6: Transmission System

6.1 Transmission Assembly Component Terminology

Identifies major components of the transmission assembly.

6.2 Transmission Description

Provides general information, towing, and maintenance for the transmission.

6.3 Transmission Specifications

Details transmission specifications and maintenance requirements.

6.4 Transmission Replacement

Procedures for removing, disassembling, installing, and post-replacement checks.

6.4.1 Transmission Removal

Step-by-step instructions for removing the transmission.

6.4.2 Transmission Disassembly

Refers to the Rexroth Repair Manual for disassembly procedures.

6.4.3 Transmission Installation

Step-by-step instructions for installing the transmission.

6.4.4 After Transmission Replacement

Post-replacement checks including filters, oil level, and bleeding.

6.5 Transmission Filter Replacement

Procedures for removing and installing the transmission filter.

6.6 Towing a Disabled Machine

Safe procedures for towing a disabled machine.

Section 7: Perkins 1104D-44T Engine

7.1 Introduction

Disclaimer, scope, and component terminology for the Perkins engine.

7.2 Engine Serial Number

Location and importance of the engine serial number.

7.3 Specifications and Maintenance Information

Refers to Section 2 for engine, coolant, and oil specifications.

7.4 Engine Cooling System

Information on radiator pressure cap and radiator/oil cooler replacement.

7.5 Engine Electrical System

Refers to Section 9 for engine electrical system details.

7.6 Fuel System

Guidelines for diesel fuel use, fuel/hydraulic oil tank service, and after-service procedures.

7.6.1 Diesel Fuel

Recommendations for diesel fuel quality and type based on temperature.

7.6.2 Fuel/Hydraulic Oil Tank

Procedures for cleaning, drying, inspecting, and disassembling the fuel/hydraulic tank.

7.6.3 After Fuel System Service

Steps to follow after servicing the fuel system.

7.7 Engine Exhaust and Air Cleaner System

Safety precautions for exhaust and air cleaner systems.

7.8 Engine Replacement

Procedures for engine removal, disassembly, and installation.

7.8.1 Engine Removal

Step-by-step instructions for removing the engine.

7.8.2 Engine Disassembly, Inspection and Service

Refers to the Perkins engine manual for detailed service procedures.

7.8.3 Engine Installation

Step-by-step instructions for installing the engine.

7.9 Engine Coupler

Procedures for removing and installing the engine coupler.

7.10 Troubleshooting

Common engine problems, their causes, and remedies.

Section 8: Hydraulic System

8.1 Hydraulic Component Terminology

Identifies and explains the hydraulic components of the machine.

8.2 Safety Information

Safety precautions for working with hydraulic systems and fluids.

8.3 Specifications

Refers to Section 2 for hydraulic system specifications.

8.4 Hoses, Tube Lines, Fittings, Etc.

Guidelines for inspecting and replacing hydraulic hoses, tubes, lines, and fittings.

8.5 Hydraulic Pressure Diagnosis

Procedures for diagnosing hydraulic pressure issues and performing checks.

8.5.1 - 8.5.5 Pressure Checks and Adjustments

Detailed steps for checking pressure in main control valve, charge, boom, and steering circuits.

8.6 Hydraulic Schematics

Provides hydraulic schematic diagrams for G5-18A and 2505 models.

8.7 Hydraulic Reservoir

Information on the hydraulic reservoir, including fill cap, draining, and filling.

8.8 Hydraulic System Pump

Analysis of implement pump failures and procedures for pump replacement.

8.9 Front Drive Motor

Procedures for front drive motor removal and installation.

8.10 Valves and Manifolds

Procedures for servicing various hydraulic valves and manifolds.

8.10.1 Main Control Valve Procedures

Removal, disassembly, cleaning, inspection, assembly, and installation of the main control valve.

8.10.2 - 8.10.11 Other Valve Procedures

Procedures for servicing brake, parking brake, steering, inching, joystick, decompression, and LSI valves.

8.11 Hydraulic Cylinders

Procedures for hydraulic cylinder removal, disassembly, inspection, assembly, installation, and torque specifications.

8.11.1 - 8.11.7 Hydraulic Cylinder Service

Detailed procedures for cylinder removal, disassembly, cleaning, inspection, assembly, and installation.

8.11.8 Hydraulic Cylinder Torque Specifications

Lists torque specifications for various hydraulic cylinder components.

Section 9: Electrical System

9.1 Electrical Component Terminology

Identifies and explains the electrical components of the machine.

9.2 Specifications

Refers to Section 2 for electrical system specifications.

9.3 Fuses and Relays

Details engine compartment and cab compartment fuses, relays, and power distribution module.

9.4 Electrical System Schematics

Provides schematic diagrams for various wiring harnesses and chassis.

9.5 Circuit Breakdowns

Breaks down electrical circuits for charge, start, constant power, and drive.

9.6 Engine Start Circuit

Procedures for testing, removing, and installing the starter motor.

9.7 Charging Circuit

Information on charging the battery and alternator removal/installation.

9.8 Electrical System Components

Details on back-up alarm, instrument cluster, and speedometer.

9.9 Window Wiper/Washer

Procedures for windshield and rear window wiper motors, and washer system.

9.10 Cab Heater and Fan

Procedures for removing and installing the cab heater assembly.

9.11 Switches, Solenoids and Senders

Procedures for various switches, sensors, and solenoids including ignition, fuel level, coolant temp, oil pressure, LSI.

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