JLG Scissor Lift 260MRT Service & Maintenance Manual 3121801 2025

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JLG Scissor Lift 260MRT Service & Maintenance Manual 3121801 2025
Size: 7.36 MB
Format: PDF
Language: English
Brand: JLG
Type of Machine: Scissor Lift
Type of Manual: Service & Maintenance Manual, Electrical and Hydraulic Diagrams
Model: JLG 260MRT Scissor Lift
Part Number: 3121801
Publication Date: 2025
Number of Pages: 108 Pages

Contents:
Section A. Introduction - Maintenance Safety Precautions

General​

Hydraulic System Safety​

Maintenance​

Section 1. Specifications

1.1 Operating Specifications​

1.2 Capacities​

1.3 Component Data​

Engine​

Tires​

Pumps​

Steer/Drive System​

Hydraulic Filter - Inline​

Torque Requirement​

1.4 Lubrication​

Hydraulic Oil​

1.5 Lubrication Specifications​

1.6 Cylinder Specifications​

1.7 Pressure Settings​

1.8 Limit Switches​

1.9 Major Component Weights​

1.10 Critical Stability Weights​

1.11 Serial Number Locations​

1.12 Torque Charts​

Section 2. Procedures

2.1 General​

2.2 Servicing and Maintenance Guidelines​

General​

Safety and Workmanship​

Cleanliness​

Components Removal and Installation​

Component Disassembly and Reassembly​

Pressure-Fit Parts​

Bearings​

Gaskets​

Bolt Usage and Torque Application​

Hydraulic Lines and Electrical Wiring​

Hydraulic System​

Lubrication​

Batteries​

Lubrication and Servicing​

2.3 Lubrication Information​

Hydraulic System​

Hydraulic Oil​

Changing Hydraulic Oil​

Lubrication Specifications​

2.4 Cylinders - Theory of Operation​

2.5 Valves - Theory of Operation​

Solenoid Control Valves (Bang-Bang)​

Proportional Control Valves​

Relief Valves​

Crossover Relief Valves​

2.6 Component Functional Description​

Hydraulic Pump​

Lift Cylinder Counterbalance/Manual Descent Valve​

2.7 Wear Pads​

Sliding Pads​

2.8 Cylinder Checking Procedures​

Cylinder w/o Counterbalance Valves - Steer Cylinder​

Cylinders w/Single Counterbalance Valves - Lift Cylinder​

2.9 Lift Cylinder Removal and Installation.​

Removal​

Installation​

2.10 Cylinder Repair​

Disassembly​

Cleaning and Inspection​

Assembly​

2.11 Steer Cylinder Repair​

Removal​

Disassembly​

Cleaning and Inspection​

Assembly​

Installation​

2.12 Limit Switch Adjustment​

Platform Limit Switch​

2.13 Pressure Setting Procedures​

Main Pressure Adjustment​

Lift Relief Adjustments​

Steer Relief Adjustment​

Leveling Jack Relief Adjustment​

Main Valve Components​

Leveling Jacks Directional Valve​

2.14 Drive Pump Start-up Procedure​

2.15 Automatic Choke - Field Adjustment (DF-750)​

Inspection​

Adjustments​

Reassembly​

Diesel Engine​

2.16 Joystick Controller​

2.17 Tilt Sensor​

Tilt Sensor, JLG P/N 4000006:​

Tilt Sensor, JLG P/N 4000021:​

2.18 Calibrations​

Tilt Sensor Calibration:​

Joystick Calibration (Software 1.5 and Higher and Higher)​

2.19 Electronic Control System​

Hand Held Analyzer​

To Connect the Hand Held Analyzer​

Using the Analyzer​

Changing the Access Level of the Hand Held Analyzer​

Adjusting Parameters Using the Hand Held Analyzer​

Machine Setup​

2.20 Flash Codes and Descriptions​

2.21 Machine Model Adjustment​

2.22 Machine Configuration Programming Information​

2.23 Preventive Maintenance and Inspection Schedule​

Section 3. General Electrical Information & Schematics

3.1 General​

3.2 Multimeter Basics​

Grounding​

Backprobing​

Min/Max​

Polarity​

Scale​

Voltage Measurement​

Resistance Measurement​

Continuity Measurement​

Current Measurement​

Continuity Measurement Over Long Distances​

Requirements:​

Procedure​

3.3 Applying Silicone Dielectric Compound To Amp Connectors​

Assembly​

Disassembly​

Wedge Lock​

Service - Voltage Reading​

3.4 Working With Deutsch Connectors​

DT/DTP Series Assembly​

DT/DTP Series Disassembly​

HD30/HDP20 Series Assembly​

HD30/HDP20 Series Disassembly​

3.5 Switches​

Basic check​

Limit Switches​

Automatic Switches​

Switch Wiring - Low Side, High Side​

3.6 Troubleshooting​

General​

Troubleshooting Information​

Hydraulic Circuit Checks​

3.7 Electrical Schematics​