Mec 3072RT User manual

SERVICE AND PARTS MANUAL
Part # 91220 R1
March 2008
3072RT / 3772RT
3772RT HD
Serial Number Range
3072RT: 9201000 - Present
3772RT / 3772RT HD: 9301000 - Present
1775ParkStreet,Suite77
Selma,California93662
Phone:[phone]Fax:[phone]
1775ParkStreet, Suite77
Selma,California93662
Phone:[phone]Fax:[phone]
ART_2497

1775 Park Street, Suite 77 • Selma, CA 93662 USA
Ph: 1-800-387-4575 • 559-891-2488 • Fax: [phone]
E-mail:[e-mail] • Web:www.mecawp.com
Aerial Platform Sales Corp.
Service Section 2
Update illustration: Deutsch Connectors
Add illustrations and update text: Continuity Checks
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Revision History:
March 2008
Service Section 4
Update Step 3:Setting Counterbalance ValvesPage 4-11
Service Section 5
Update text: Hydraulic Schematic - bold table heads
Update illustration: Hydraulic Schematic
Update illustration: Outrigger Electric Schematic
Update illustration: Generator Option Schematic
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Parts Section 1
Update illustration: Base Control Box
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Parts Section 4
Update illustration: Rear Axle Assembly
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Parts Section 6
Update illustration: Base Assembly
Update parts list to identify Power to Platform Bracket
Update illustration: Control Module
Update parts list to identify Hole Plug
Update illustration: Engine, Dual Fuel
Update illustration: Engine, Dual Fuel
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Update illustration: Engine, Diesel
Update parts list to identify new part numbers
Update illustration: Engine, Diesel
Update parts list to identify new part numbers
New illustration: Harnesses
Update parts list to identify new part numbers
Update illustration: Outrigger Install
Update parts list to identify Power to Platform Bracket
New Illustration: Generator Option, Dual Fuel
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New Illustration: Generator Option, Diesel
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Reason for update
Pages
Parts Section 7
Update illustration: 3072RT Sides
Update parts list
Update illustration: 3072RT Ends
Update parts list
Update illustration: 3772RT / 3772RT HD Sides
Update parts list
Update illustration: 3772RT / 3772RT HD Ends
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Introduction
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Table of Contents
"3072RT / 3772RT / 3772RT HD" Service & Parts Manual - ANSI Specifications March 2008
Page i
Service Sections
INTRODUCTION ............................................................................................... I
General Safety Tips ............................................................................................... III
Hydraulic System ............................................................................................... IV
Electrical System................................................................................................ IV
Total System ....................................................................................................... IV
Machine Specifications .......................................................................................... V
Primary Machine Components ............................................................................ VII
LUBRICATION ...................................................................................................... VIII
SECTION 1:
HYDRAULIC SYSTEM ............................................................................. 1-1
Hydraulic System - General ................................................................................ 1-2
Hydraulic Fluid ..................................................................................................... 1-3
Hydraulic Fluid Reservoir ................................................................................... 1-6
Hydraulic Pump ................................................................................................... 1-7
Wheel Drive .......................................................................................................... 1-7
Parking Brake and Towing Circuit .................................................................... 1-14
Emergency Systems And Procedures ............................................................. 1-15
Steering Circuit .................................................................................................. 1-16
Platform Lift Circuit ........................................................................................... 1-18
Optional Outriggers ........................................................................................... 1-20
Cylinder Repair .................................................................................................. 1-21
Hydraulic Manifold............................................................................................. 1-24

Table of Contents
March 2008 "3072RT / 3772RT / 3772RT HD" Service & Parts Manual - ANSI Specifications
Page ii
SECTION 2:
ELECTRICAL SYSTEM ........................................................................... 2-1
Electrical System - General ................................................................................ 2-2
Deutsch Connectors............................................................................................ 2-3
Battery .................................................................................................................. 2-4
Battery Preventative Maintenance:................................................................... 2-5
Battery Replacement........................................................................................ 2-6
Alarms and Switches .......................................................................................... 2-7
Tilt Alarm .......................................................................................................... 2-8
Relays .............................................................................................................. 2-9
Limit Switch ....................................................................................................... 2-10
Optional Outriggers Switches .......................................................................... 2-10
Continuity Checks ............................................................................................. 2-11
SECTION 3:
MECHANICAL COMPONENTS ............................................................... 3-1
Torque Specifications ......................................................................................... 3-2
Mechanical Components .................................................................................... 3-3
Base/ Undercarriage ........................................................................................ 3-3
Raising the Machine ......................................................................................... 3-3
Tires ................................................................................................................. 3-4
Drive Motors ..................................................................................................... 3-5
Steer Cylinder .................................................................................................. 3-6
Hoses and Cables ............................................................................................ 3-7
Platform Removal ............................................................................................. 3-7
Lift Cylinder Removal and Installation .............................................................. 3-8
Scissor Beam Assembly................................................................................... 3-8
Engine Maintenance ............................................................................................ 3-9
Diesel Engine ................................................................................................... 3-9
Gasoline and Dual Fuel Engine...................................................................... 3-12
Outrigger Function ............................................................................................ 3-14
Outrigger Calibration ...................................................................................... 3-15
GP106 Outrigger Control Module Troubleshooting ......................................... 3-17
Outrigger Module GP106 LED Flash Codes .................................................. 3-18

Table of Contents
"3072RT / 3772RT / 3772RT HD" Service & Parts Manual - ANSI Specifications March 2008
Page iii
SECTION 4:
TROUBLESHOOTING ............................................................................. 4-1
Troubleshooting ................................................................................................... 4-3
General Troubleshooting Tips ........................................................................... 4-3
Common Causes of Hydraulic System Malfunctions:....................................... 4-3
Hydraulic Pressure Adjustment Procedures..................................................... 4-9
Proportional Speed Adjustment ....................................................................... 4-12
Controls and Switches ...................................................................................... 4-14
SECTION 5:
SCHEMATICS ..........................................................................................5-1
Hydraulic Schematic ........................................................................................... 5-2
Main Hydraulic Manifold ................................................................................... 5-4
Optional Outriggers Hydraulic Manifold ............................................................ 5-5
Electric Schematics ............................................................................................. 5-6
Circuit Board .................................................................................................... 5-8
Controls .......................................................................................................... 5-10
Engine ............................................................................................................ 5-13
Optional Outriggers ........................................................................................ 5-15
Optional Generator ......................................................................................... 5-16