JLG 20MSP, 20MVL Vertical Mast Service Manual
178 pages · Publication 31217401
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What's inside
From the manual's own table of contents: 322 sections, 375 entries. See sample pages (PDF, 591 KB)
General
Hydraulic System Safety
Maintenance1 topic
- Machine Specifications
Machine Wheel Loads and PSI - Per Wheel
Electrical Specifications
Platform Data
Machine Component Weights
Serial Number Locations1 topic
- Lubrication
Hydraulic Oil
Lubrication Specifications4 topics
- Cylinder Specifications
- Torque Requirements
- Threadlocking Compound
- Torque Charts
SAE Fastener Torque Chart
Metric Fastener Torque Chart1 topic
- Machine Preparation, Inspection, and Maintenance
Preparation, Inspection, and Maintenance
Pre-Start Inspection
Pre-Delivery Inspection and Frequent Inspection
Annual Machine Inspection
Preventative Maintenance1 topic
- Preventive Maintenance and Inspection Schedule
Inspection and Maintenance Codes
Footnotes1 topic
- Servicing and Maintenance Guidelines
Safety and Workmanship
Cleanliness
Components Removal and Installation
Component Disassembly and Reassembly
Pressure-Fit Parts
Show all 322 sections
Bearings
Gaskets
Bolt Usage and Torque Application
Hydraulic Lines and Electrical Wiring
Hydraulic System
Lubrication and Servicing
Batteries
Mast Chain Inspection Procedure1 topic
- Lubrication Information
Changing Hydraulic Oil2 topics
- Base Assembly Components
- Base Frame Covers
Drive Motor Cover - Installation
Battery Charger Cover - Installation2 topics
- Drive/Elevation Cut-out Switch Installation
- Drive and Caster Wheels
Tire Wear and Damage
Wheel and Tire Replacement
Wheel Installation
Caster Wheels - Installation1 topic
- Wheel Drive Assembly - Servicing
Roll and Leak Testing
Oil Type & Capacity
Drive Motor Brush Wear - Warning Indication
Wheel Drive Assembly - Removal From Machine
Wheel Drive Disassembly - Main Components
Replacing Drive Motor Brushes
Gear Box Main Disassembly
Input Carrier Disassembly
Hub Disassembly
Spindle Disassembly
Spindle Sub-Assembly
Hub Sub-Assembly
Input Carrier Sub-Assembly
Main Gear Box Sub-Assembly
Motor, Brake and Gear Box Assembly2 topics
- Pot Hole Protection System
- Battery Charger - Service Procedures
Battery Charger General Information
Battery Charger Maintenance Information
Battery Charge LED Indicator on Platform Control Console
Battery Low Voltage Warning Indicators
Battery Charging Status Indicators
Battery Charger Check/Change Charging Algorithm
Battery Charger Removal/Installation2 topics
- Control Components Overview
- Controls Cover Installation
Battery Cover Doors
Center, Left and Right Lower Covers1 topic
- Control Components - Installation
Ground Control Module
Traction Control Module
Platform Control Console Installation
Horn Installation
Alarm Installation1 topic
- Batteries - Service Procedures
Battery Replacement
Battery Condition Testing
Battery Disconnect (Option)
Battery - Installation - (2-12 V Batteries)
Battery Installation - (4-6 V Batteries) (Option)1 topic
- Ground Control Module - Service Procedure
Cover Removal/Installation
Power Selector/E-Stop Switch Installation1 topic
- Ground Control Station - Programming
Activating Programming Mode
Entering Password
Programming Mode Selection
Selecting Programmable Item to Adjust
Adjusting Programmable Setting
Service Programming Mode - (Level-2)
Operator Programming Mode - (Level-3)1 topic
- Platform Control Console - Service Procedures
Remove Platform Control Console
Display/Controller Module Electrical Connections
Mounting Bracket - Install/Remove
Rear Cover - Install/Remove
Display/Controller Module - Install/Remove
Drive/Lift Mode Switch - Install/Remove
Horn Button Switch - Install/Remove
Key Switch - Install/Remove
E-Stop/ShutDown Switch - Install/Remove
Joystick Assembly - Install/Remove1 topic
- Pump-Motor Assembly - Service Procedure
Hydraulic Pressure Settings and Adjustment
Hydraulic Pressure Gauge Connection
After Filter Pressure Check
Pump/Motor/Tank Installation
General Installation and Disassembly
Inline Hydraulic Filter Installation
Fenner Brand Pump - Brush Replacement
Motor Cap/Motor Installation
Motor Brush Installation
Brush Housing Final Assembly Tips
Monarch Brand Pump - Brush Replacement
Motor Assembly - Remove/Install - Reference Marks
Motor/Brush Cover - Remove/Install
Brush Carrier Assembly - Remove/Install
Brush Assembly - Remove/Install
Tank Installation
Filter Screen Installation
Pump Installation
Pressure Adjust Valve Installation
Pressure Check Valve Installation2 topics
- Mast Components Overview
- Mast Chains And Sequencing Cables Adjustment
Mast Chain/Cable Adjustment
Sequencing Cable Adjustment1 topic
- Sequence Cable Replacement Kit
Remove Old Cable
Replacement Cable Installation
Clamp Installation (Drum/Socket Type)1 topic
- Hydraulic Line - Disconnect - Special Tool
Tool Use - In-Line Style Fittings
Tool Use - Angled Style Fittings1 topic
- SECTION NO. TITLE PAGE NO. Hydraulic Lift Cylinder - Removal, Inspection and rebuild
Lift Cylinder Removal
Cylinder Disassembly
Lift Cylinder Component Inspection
Cylinder Assembly (See Figure 5-11.)
Cylinder Installation1 topic
- Mast Assembly Installation
Mast Removal
Mast Installation1 topic
- Mast Assembly And Disassembly Procedures
Mast Disassembly Procedure - MVL/MSP
Mast Assembly Procedure - MVL/MSP4 topics
- MSP - Stockpicker Platform - Installation
- MSP - Stockpicker Platform - Mid-Gate Interlock Installation
- Mast Beacon - Installation
- Gate Alarm - Installation - Option (For Side Entry W/folding Material Tray Platform Only)
Switches and Wiring1 topic
- Load Sensing System (LSS)
Setting Spring Pre-Load
Setting Positive Stops
Adjusting Switch5 topics
- General
- Troubleshooting Information
- Hydraulic Circuit Checks (See Figure 6-10.)
- Electrical Circuit Checks
- Multimeter Basics
Grounding
Back-Probing
Min/Max
Polarity
Scale
Continuity Measurement Over Long Distances
Requirements
Procedure1 topic
- Electrical Switch Testing
Basic Check
Limit Switches
Automatic Switches
Switch Wiring - Low Side, High Side2 topics
- Ground Control Module LCD Display
- Troubleshooting Tables Index
Specifications for Various Components
Special Pin Extractor Tools for Electrical Connectors
Fault Code Troubleshooting Tables
Main Power Circuit Troubleshooting
Mast Troubleshooting
Hydraulic Leak Troubleshooting
Base Frame Components Troubleshooting
Drive System Troubleshooting3 topics
- Specifications for Various Components
- Special Pin Extractor Tools for Electrical Connectors
- Fault Code Troubleshooting Tables
Machine in Drive Speed Cut-Back (Turtle) Mode All The Time
Battery Voltage Low - Warning Level 3 - Three (3) LED/LCDs lit
Overload Alarm and Overload Indicator
Code 02 - Left PHP Bar - UP
Code 03 - Right PHP Bar - UP
Code 04 - Tilt Condition
Code 05 - Reserved
Code 06 - Drive Motor Brush Wear Warning Indicator
Code 07 - Left Drive Motor - Disconnected
Code 08 - Right Drive Motor - Disconnected
Code 09 - Left Brake - Disconnected
Code 10 - Right Brake - Disconnected
Code 11 - Left Drive Motor - Short Circuit
Code 12 - Right Drive Motor - Short Circuit
Code 13 - Traction Module - in Fold Back
Code 14 - Pump Motor - Disconnected
Code 15 - Lift Down Valve - Disconnected
Code 16 - Lift Down Valve - Short Circuit
Code 17 - Ground Control Module - in Fold Back
Code 18 - Alarm - Short Circuit
Code 19 - Alarm - Disconnected
Code 20 - Beacon - Short Circuit
Code 21 - Beacon - Disconnected
Code 22 - Horn - Short Circuit
Code 23 - Horn - Disconnected
Code 24 - Auxiliary #1 Circuit - Short Circuit
Code 25 - Auxiliary #1 Circuit - Disconnected
Code 26 - Auxiliary #2 - Short Circuit
Code 28 - Reserved
Code 29 - Reserved
Code 30 - Traction Module - No Communication with Ground Control Module
Code 31 - Platform Control Console - No Communication with Ground Control Module
Code 32 - Pump Motor - Over Current
Code 33 - Both PHP Bars - UP
Code 34 - P2-Auxiliary #1 - Inhibit
Code 35 - P2-Auxiliary #1 - Tie Down
Code 38 - Battery Voltage Low - Warning Level 2 - Two (2) LED/LCDs lit
Code 39 - Battery Voltage Low - Warning Level 3 - One (1) LED/LCDs lit
Code 40 - Obstruction Sensor System - No Communication with Ground Control Module
Codes
Codes (100 - 199) Ground Control Module - Fault Condition
Codes (200 - 299) Platform Control Console - Fault Condition
Codes (300 - 399) Traction Control Module - Fault Condition1 topic
- Main Power Circuit Troubleshooting
Machine Will Not Power Up1 topic
- Mast Troubleshooting
Platform Will Not Lower Manually
Platform Lift Up And Down - Jerky
Mast Noisy When Lifting And Lowering
Platform (Mast) Won’t Stay Elevated
Platform (Mast) Descends Too Slowly1 topic
- Hydraulic Leak Troubleshooting
Miscellaneous Hydraulic Leak Troubleshooting1 topic
- Base Frame Components Troubleshooting
Caster Wheels Not Operating Freely
Pot Hole Protection (PHP) Bars will not Lower1 topic
- SECTION NO. TITLE PAGE NO. Drive System Troubleshooting
Won’t Climb Grade
Machine Drives in Opposite Direction
Machine Won’t Drive Straight
Noise From Drive Assembly
Base Components
Drive Motor Cover Installation
Battery Charger Cover Installation
Drive/Elevation Switch Cut-Out Switch Installation
Wheel Lug Nut Tightening Sequence
Caster Wheel - Installation
Wheel Drive Assembly - Installation (Right Side Shown)
Drive Motor Disassembly - Main Components
Drive Motor - Brush Holder Components
Pot-Hole-Protection System Components
PHP Link Installation (Item 5 in Component Illustration Above)
Pot-Hole Switch and Mounting Bracket
MVL/MSP Battery Charger Removal
Control Components Location - MVL/MSP
Ground Control Module Installation
Traction Control Module Installation
Platform Control Console - Installation
Battery Installation (Left Side Battery Shown)
Component Electrical Connections. (2-12 V Batteries shown)
Battery Installation - 4-6 V (Left Side Batteries Shown with Machine Covers Removed)
Battery Cable to Battery Terminal Connections (4-6 V)
Ground Control Module Components
Cover Installation
Disconnect the Ribbon Cable
Release Ribbon Cable
Reconnecting Ribbon Cable
Emergency Stop Switch Installation
Power Selector Switch Installation
Power Selector/E-Stop Switch - Connectors Location
Platform Control Console Components
Platform Console - Circuit Board Connections
Platform Console - Mounting Bracket
Platform Console - Rear Cover Installation
Platform Console - Display Module
Platform Console - Drive/Lift Mode Select Switch
Platform Console - Horn Switch Installation
Platform Console - Key Switch Installation
Platform Console - E-Stop Switch Installation
Platform Console - Joystick Installation
Hydraulic Pressure Adjustment Screw (Machine Rear Covers Removed)
Typical Hydraulic Pressure Gauge Installation (Hydraulic Filter Removed)
Typical Hydraulic Pressure Gauge Installation (After Hydraulic Filter)
Pump/Motor/Tank Assembly Installation
Motor Cap Installation
Motor Installation
Brush Housing Installation
Brush Assembly Connections
New Brush Installation
Brush Final Positioning
Motor/Brush Cover - Removal/Installation
Pump O-Ring Installation
Mast Components. (MVL/MSP)
MVL/MSP - Mast Chain and Sequence Cable Adjustment Components
Machine Positioned for Cylinder Removal
Hydraulic Extend and Return Lines
Extending Mast Sections
Chain Assembly - Bottom of Mast Section-3
Exposing Top of Mast Section-2
Snap Ring Installation
Cylinder Rod Pin Installation
Lift Cylinder Mount Installation
Lift Cylinder Component Cross-Section (MVL/MSP)
Lift Down Valve and Manual Release Installation
Mast Assembly Installation
Mast Section - Assembly Reference
Mast Chain Routing Diagram. - MVL/MSP
Chain/Anchor Plate Installation
Mast Bottom End - Slide Pad Installation (Typical)
Mast Top End - Slide Pad Installation (Typical)
Install Chain/Anchor Block to Top of Lift Cylinder
Mast Section 2 - Chain/Anchor Block (Sheave Wheel Assembly)
Mast Section 3 - Chain Anchor Bracket
Mast Section 3 - Chain/Anchor Plate Installation (Mast Section-3 Shown Cut-away)
Mast Section 3 - Sheave Wheel Assembly
Mast Section 4 - Chain Anchor Bracket
Mast Section 4 - Sheave Wheel Assembly
Mast Section 5 - Bottom End Components (Chain Anchor Bracket and Slide Pad Installation)
Lanyard Attach Installation
Sequence Cable Bracket Installation (Bottom End)
MSP - Stockpicker Platform Installation
MSP - Platform - Mid-Gate Interlock Switch Installation
MSP - Platform - Mid-Gate Interlock Switch
Mast Mounted Beacon Installation (MVL/MSP)
Load Sensing System (LSS)
Voltage Measurement (DC)
Resistance Measurement
Continuity Measurement
Current Measurement (DC)
Component Electrical Connections
Overview of Electrical System Components (MVL/MSP) - Sheet 1 of 2
Overview of Electrical System Components (MVL/MSP) - Sheet 2 of 2
Electrical Diagram (MVL/MSP)
Hydraulic Diagram (MVL/MSP)
20MVL/MSP - Machine Maximum Wheel Loads (lb) and (PSI) - Per Wheel
Max. Capacity with Side Entry Platform w/Folding Material Tray Installed
Hydraulic Oil Operating Range
Cylinder Specifications
Lubrication Intervals for Various Components
Inspection and Maintenance
MVL/MSP - Preventive Maintenance & Inspection Schedule
Chain Stretch Tolerance
Wheel Torque Chart
Battery Charger Algorithm Settings
MVL/MSP Ground Control Module - Field Programmable Settings and Factory Preset
MVL/MSP Mast Component Features
LCD Display - Service Fault Code Conditions
Ohm Ratings for Various Components
Amperage Draw for Various Components
Code 08 - Right Drive Motor Disconnected
Code 21 - Beacon - Short Disconnected
Code 40 - OSS - No Communication with Ground Control Module
Code (200 - 299) Platform Control Console - Fault Condition
Platform Lift Up and Down Jerky
Machine Drive in Opposite Direction
Inside this manual
Real pages from this service manual (178 pages). Open the sample pages (PDF, 588 KB)
- Specifications, page 18: SECTION 1 - GENERAL SPECIFICATIONS
- Troubleshooting, page 144: 6.11 FAULT CODE TROUBLESHOOTING TABLES
- Diagram, page 152: Code 19 - Alarm - Disconnected
- Color page: SECTION 6 - TROUBLESHOOTING
Other manuals for this machine
Save 10% on 2 manuals, 15% on 3 or more. Other manuals for the 20MSP, 20MVL are listed below. Editions cover different serial number ranges: check the serial coverage and tick only the ones that match your machine.
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This is a service manual
Here's how it compares to the other manual types.
This manual
Service manual
Factory repair procedures and technical information such as specifications, troubleshooting, and wiring and hydraulic diagrams, for the models and systems the manual covers. See What's inside for its topics.
Operator's manual
Safe operation, controls, maintenance schedules, lubrication points, inspections, and basic checks. Repair procedures are in the service manual.
Parts manual
Illustrated diagrams with factory part numbers for identifying components and ordering parts. Repair procedures are in the service manual.
Engine service manuals are sometimes sold separately, since certain machine models were offered with more than one engine option.
What it's used for
Factory manual for in-house farm and construction shop use. Straightforward, complete, and easy to follow. It contains the OEM information dealership service departments and parts counters use to diagnose problems, identify components, and perform maintenance or repairs correctly.
Service shops and owner/operators who repair their own equipment
Identifying correct parts and seeing how assemblies come apart and go back together
Keeping equipment running with less downtime
Factory manual, 178 pages
Quantity one is the manual described above.
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Other editions and similar models
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