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Skytrak 8042 Service Manual

Skytrak 8042
418 pages
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An Oshkosh Corporation Company
Service Manual
Models
6036, 6042, 8042,
10042 & 10054
SN 0160069719 to Present
including 0160065791, 0160065792, 0160065796,
0160065798, 0160065824, 0160065825,
0160065826, 0160069336, 0160069359,
0160069383, 0160069411, 0160069441,
0160069566, 0160069567 & 0160069568
31211015
Revised
July 31, 2017

Table of Contents

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Skytrak 8042 Specifications

General IconGeneral
BrandSkytrak
Model8042
CategoryLifting Systems
LanguageEnglish

Summary

Service Manual

Models

Specifies the models covered by this service manual: 6036, 6042, 8042, 10042 & 10054.

Section 1 Safety Practices

Safety Instructions

General safety statements to consider before performing maintenance procedures on the telehandler.

Section 2 General Information and Specifications

Service and Maintenance Schedules

Outlines maintenance tasks required at different hour intervals (e.g., Every 10 Hours, First 250 Hours).

Torque Charts

Provides torque values for SAE and Metric fasteners, with different coating options.

Section 3 Boom

Boom Assembly Maintenance

Provides sequential instructions for removing and installing boom sections for the four-section boom.

Section 4 Cab and Covers

Cab Removal

Provides step-by-step instructions for safely removing the cab from the machine.

Cab Installation

Details the procedure for reinstalling the cab onto the machine, including checks and connections.

Section 5 Axles, Drive Shafts, Wheels and Tires

Axle Assembly and Drive Shaft Troubleshooting

Lists common problems related to axle noise, oil leaks, and steering effort, with causes and remedies.

Towing a Disabled Machine

Outlines procedures for safely preparing a disabled machine for towing.

Section 6 Transmission

Transmission Replacement

Provides notes on contacting JLG Service for internal repairs and emphasizes cleanliness before removal.

Transmission Troubleshooting

Covers common transmission problems, their causes, and recommended remedies.

Section 7 Engine

Engine Replacement

Details engine removal and installation procedures, including necessary tools and safety precautions.

Section 8 Hydraulic Section

Hydraulic Pressure Diagnosis

Details pressure checks and adjustments, including general procedures and specific pressure specifications.

Section 9 Electrical System

Safety Information

Emphasizes following all safety precautions outlined in Section 1 before servicing the machine.

Engine Start Circuit

Covers starter testing, circuit checks, and starter removal/installation procedures.

Troubleshooting

Covers fault detection and offboard diagnostics for machine and engine issues.

Machine Fault Codes

Lists fault codes related to power-up, cabin controls, engine, and communications.

Engine Fault Codes

Provides a comprehensive list of SPN, FMI, Fault Code, SPN Description, and Description for engine faults.

Section 10 Stabil-TRAK™ System and Boom Interlock System

Stabil-TRAK™ Operation

Describes the machine's operation in Free Pivot, Slow Pivot, and Locked modes, including specific conditions.

Stabil-TRAK™ System Test

Outlines instructions and procedures for testing the Stabil-TRAK system's proper function.

Stabil-TRAK™ Electrical Circuit Operation and Troubleshooting (6042/8042/10042)

Covers electrical circuit operation and troubleshooting for the Stabil-TRAK system on specific models.

Stabil-TRAK™ and Boom Interlock Electrical Circuit Operation and Troubleshooting (10054)

Details electrical circuit operation and troubleshooting for Stabil-TRAK and boom interlock systems on Model 10054.

Boom/Outrigger Interlock System Test

Provides procedures to test the Boom/Outrigger Interlock System and Stabil-TRAK system functionality.

Stabil-TRAK™ Hydraulic Circuit Operation and Troubleshooting

Troubleshooting Symptom Chart

Lists symptoms, conditions, and references for troubleshooting Stabil-TRAK system issues.

Hydraulic Troubleshooting - FREE PIVOT Mode, Rod Oil Out

Provides troubleshooting steps for FREE PIVOT Mode when rod oil is out, covering wiring, solenoids, and check valves.

Hydraulic Troubleshooting - SLOW PIVOT Mode, Base Oil Out

Provides troubleshooting steps for SLOW PIVOT Mode when base oil is out, covering wiring, solenoids, and check valves.

Hydraulic Troubleshooting - SLOW PIVOT Mode, Rod Oil Out

Provides troubleshooting steps for SLOW PIVOT Mode when rod oil is out, covering wiring, solenoids, and check valves.

Hydraulic Troubleshooting - LOCKED MODE, Will Not Frame Level Right

Troubleshooting guide for Locked Mode when frame leveling to the right is unsuccessful.

Hydraulic Troubleshooting - LOCKED MODE, Will Not Frame Level Left

Troubleshooting guide for Locked Mode when frame leveling to the left is unsuccessful.

Hydraulic Troubleshooting - Extend Interlock Mode

Troubleshooting guide for the boom extend interlock system when boom does not extend.

Hydraulic Troubleshooting - Outrigger Interlock Mode

Troubleshooting guide for the outrigger interlock system when boom will not extend to its full limits.

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