JLG Telehandler 8042 / 10042 / 10054 Service Manual

Comprehensive service and repair manual for JLG 8042, 10042, and 10054 telehandlers. Covers all maintenance, troubleshooting, and part replacement procedures. PN: 8990396 C.

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Document Details

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Document Number / Seller:
30676 / Amy Cooper
File Size:
56.96 MB
File Type:
PDF
Language:
English
Printable:
Yes
Category:
Telehandler
Last updated / verified
Oct 17, 2025

Models Covered & Key Technical Specifications

JLG Telehandler Service Manual: 8042, 10042, 10054 - Diagnostics, Safety & Maintenance Hydraulic-Guide

Integrated Documentary Specification | Kit. Design Specs: 41' 11" maximum lift height, boom extended for vertical reach Capability. Nominal Velocity Specs: 0-20 mph (0-32.2 km/hr) defines the maximum travel speed Parameters. Technical Velocity Specs: 225.25" (5.721 mm) length without attachment establishes the overall machine dimension Standards. Standard Specs: 18.0" (457 mm) ground clearance for operational movement Margin. Principal Specifications: 68.5° maximum boom lift angle dictates the steepest angle Architecture. Key Specs: 102.0" (2.591 mm) width (outriggers up) represents the machine's stowed size Norms.

Professional Workshop Service Manual & Technical Specifications

JLG Telehandler Service Manual: 8042, 10042, 10054 - Diagnostics, Safety & Maintenance Hydraulic-Guide

Series-Validation: JLG Telehandlers // Equipment-Series: 8042, 10042, 10054 Legacy // Series-Validation: Telehandler

Metric Technical-Path Architecture
Model 8042, 10042, 10054 Component Terminology
Safety Practices Information
General Information & Specifications Data
Boom Systems Components
Axles, Drive Shafts, Wheels and Tires Specifications Data

Coverage is segmented into:

Safety Practices

Provides essential safety information, including hazard statements, warnings, and precautions. Covers personal and equipment hazards, as well as general and operational safety considerations. Outlines procedures for accident prevention and emergency information decal locations.

General Information and Specifications

Details component terminology, service methods, and essential specifications for the JLG telehandler models. Includes torque values, metric conversion factors, vehicle dimensions, and tire information. Also covers fluids, lubricants, capacities, and electrical system specifications.

Boom

Covers the boom system for four-section booms (10054), including system description, operation, and maintenance. Details boom chain inspection and adjustment for both three-section and four-section booms, with specific procedures for extend and retract chains.

Engine: Cummins 4BT3.9 and 4BTA3.9

Provides engine manufacturer specifications, including horsepower, displacement, and fuel delivery. Details engine oil and cooling system requirements, as well as fuel tank capacity and specifications.

Hydraulic System

Covers hydraulic fluid specifications, system capacity, and reservoir capacity. Details hydraulic relief valve settings for different models and includes information on hydraulic systems, pumps, cylinders, and troubleshooting. ...documents torque specifications for various components to ensure proper oscillation integrity.

FAQ

What does the **exact** assembly sequence for the boom chains involve? keyboard_arrow_down

17 pins is the span for measuring extend chain elongation, and 13 pins for inner extend chain, with pin center to pin center measurements.

Reference the **specific** service interval parameters for boom chain inspection. keyboard_arrow_down

Extend chains require inspection every 250 hours of operation, while retract chains need inspection every 1000 hours.

What are the **designated** system architecture specifications for the boom? keyboard_arrow_down

The boom chains' normal life expectancy is expressed as a maximum of 3% elongation of pitch.

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Reviews (2)

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The service manual is comprehensive and covers all necessary safety practices. The download process was smooth, and customer support was very professional and responsive.
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New
This manual has been a lifesaver for my team. The detailed maintenance procedures are clear and easy to follow. I also appreciate the quick email response with the download link.