Mec Speed Level 2684 RT Building instructions

SERVICE AND PARTS MANUAL
Speed Level™ Sigma
Lifts
May 2010
Serial Number Range
11800001 - Up Part # 91885
2684 & 3084 RT Internal Combustion
2684 & 3084 ES Electric
CE & ANSI certifications

1401 S. Madera Avenue • Kerman, CA 93630 USA
Ph: 1-800-387-4575 • 1-559-842-1500 • FAX [phone]
E-mail:[e-mail] • Web:www.mecAWP.com
Speed Level™ is a trademark of MEC.
Aerial Platform Sales Corp.
Revision History
Original Release Date: May 2010
Date Reason for Update
5/2010 New Release

“3084 Speed Level™ Sigma Lift” Service and Parts Manual October 2009
Page i
Service Table of Contents
Introduction I Page
Machine Specifications - 3084RT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . II
Machine Specifications -3084ES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . III
MEC Operator Policy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .IV
Safety Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . V
General Safety Tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .VI
Hydraulic System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VII
Electrical System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VII
Total System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VII
Primary Machine Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VIII
Emergency Systems and Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . XI
Emergency Lowering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .XI
Parking Brake and Towing Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . XII
Lift and Support the Machine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .XIII
Transporting the Machine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .XIV
Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .XIV
Section 1: Hydraulic System Page
Hydraulic System – General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Hydraulic Fluid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Hydraulic Fluid Reservoir . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
Hydraulic Pump - 3084RT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
Hydraulic Pump - 3084ES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10
Hydraulic Manifold . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11
Drive and Brake System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16
Steering Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-24
Platform Leveling System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-25
Platform Lift Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-26
General Cylinder Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-28
Generator Option - 3084RT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-31
Section 2: Electrical System Page
Electrical System – General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
Battery Maintenance (in storage) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
Battery Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7
Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
Lower Controls - 3084RT Dual Fuel/Diesel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
Lower Controls - 3084ES Electric . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9
Upper Controls - 3084RT Dual Fuel/Diesel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10
Upper Controls - 3084ES Electric . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11
Alarms and Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12
Deutsch Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14
Continuity Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15
GP400 Control Module Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18
Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18

“3084 Speed Level™ Sigma Lift” Service and Parts ManualOctober 2009
Page ii
Service Table of Contents
General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-19
GP400 Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-20
Calibration Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-25
Failure Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-25
Information Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-30
Section 3: Mechanical Components Page
Mechanical Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
Base . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
Tires and Wheels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
Drive Motors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
Steer Cylinder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6
Floating Axle Lock Cylinders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7
Platform Leveling Cylinders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9
Hoses and Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10
Platform Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10
Lift Cylinder Removal and Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11
Boom - Elevating Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12
Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13
Engine Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14
Diesel Engine Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14
Gasoline & Dual Fuel Engine Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-17
Section 4a: Troubleshooting - 3084RT Model Page
General Troubleshooting Tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4a-3
Electrical System Troubleshooting - 3084RT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4a-4
GP400 Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4a-5
Matrix Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4a-6
Terminal Block Module (TBM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4a-6
EZ-Cal Scan Tool . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4a-7
EZ-Cal Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4a-13
EZ-Cal Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4a-15
EZ-Cal Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4a-16
Ez-Cal Retrieve Mode And Help Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4a-19
MODE Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4a-19
Troubleshooting Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4a-29
Hydraulic Pressure Adjustment - 3084RT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4a-33
Adjusting Relief Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4a-33
Adjustments - 3084RT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4a-34
Counterbalance Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4a-35
Component Illustrations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4a-36

“3084 Speed Level™ Sigma Lift” Service and Parts Manual October 2009
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Service Table of Contents
Section 4b: Troubleshooting - 3084ES Model Page
General Troubleshooting Tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4b-3
Electrical System Troubleshooting - 3084ES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4b-4
GP400 Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4b-5
Matrix Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4b-6
Terminal Block Module (TBM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4b-6
P600 Motor Control Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4b-7
EZ-Cal Scan Tool . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4b-8
EZ-Cal Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4b-14
EZ-Cal Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4b-16
EZ-Cal Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4b-17
Ez-Cal Retrieve Mode And Help Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4b-19
MODE Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4b-19
Troubleshooting Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4b-29
Troubleshooting Battery Charger: Electric Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4b-34
Battery Charger, HB1500-48 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4b-35
Hydraulic Pressure Adjustment - 3084ES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4b-37
Adjusting Relief Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4b-37
Adjustments - 3084ES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4b-38
Counterbalance Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4b-39
Component Illustrations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4b-40
Section 5: Schematics Page
3084RT Diesel/Dual Fuel Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2
Hydraulic - 3084RT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-2
Electrical - 3084RT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-6
3084ES Electric Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-14
Hydraulic - 3084ES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-14
Electrical - 3084ES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-18

“3084 Speed Level™ Sigma Lift” Service and Parts ManualOctober 2009
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Service Table of Contents
N OTES :

“Speed Level™ Sigma Lifts” Service and Parts Manual May 2010
Page I
INTRODUCTION
This manual consists of Service and Illustrated Parts sections.
The Service Section of this manual is designed to provide you, the customer, with the instructions
needed to properly maintain the MEC self-propelled aerial work platform. When used in conjunc-
tion with the Illustrated Parts Section and the Operators Manual (provided separately), this manual
will assist you in making necessary adjustments and repairs, and identifying and ordering the cor-
rect replacement parts.
All parts represented here are manufactured and supplied in accordance with MEC quality stan-
dards.
We recommend that you use genuine MEC parts to ensure proper operation and reliable perfor-
mance.
To obtain maximum benefits from your MEC Aerial Work Platform, always follow the proper oper-
ating and maintenance procedures. Only trained authorized personnel should be allowed to oper-
ate or service this machine. Service personnel should read and study the Operator’s, Service and
Parts Manuals in order to gain a thorough understanding of the unit prior to making any repairs.
C ONTENTS P AGE
Machine Specifications - RT Models. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . II
Machine Specifications - ES Models. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .III
MEC Operator Policy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . IV
Safety Symbols. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . V
General Safety Tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VI
Hydraulic System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .VII
Electrical System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VII
Total System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .VII
Primary Machine Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VIII
Emergency Systems and Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . XI
Emergency Lowering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . XI
Parking Brake and Towing Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . XII
Lift and Support the Machine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . XIII
Transporting the Machine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . XIV
F IGURES P AGE
Support Platform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VI
Component Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VIII
Component Locations, Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . IX
Emergency Lowering Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . XI
Disengage Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . XII
Loading the Machine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . XIV

“Speed Level™ Sigma Lifts” Service and Parts ManualMay 2010
Page II
M ACHINE S PECIFICATIONS - RT M ODELS
2684RT 3084RT
Working Height* 32 ft* 10.0 m* 36 ft* 11.0 m*
Platform Height 26 ft 7.9 m 30 ft 9.0 m
Stowed Height Rails Up 107 in 2.72 m 105 in 2.67 m
Rails Folded Down 72 in 1.83 m 70 in 1.78 m
Maximum Occupants 0 m/s wind 5 5
45 km/h (12.5 m/s) wind 5 5
On Slide-Out Extension 2 N/A
Lift Capacity 1700 lbs 770 kg 1500 lbs 680 kg
Slide-Out Deck Capacity 700 lbs 320 kg N/A
Platform Dimensions Length (inside rails) 12 ft 2 in 3.71 m 14 ft 4.27 m
Length (platform extended) 16 ft 2 in 4.93 m N/A
Platform Width (inside rails) 72 in 1.83 m 72 in 1.83 m
Guardrail Height 43.5 in 1.1 m 43.5 in 1.1 m
Toeboard Height 6 in 15 cm 6 in 15 cm
Overall Length 13 ft 2 in 4.0 m 14 ft 6 in 4.4 m
Overall Width 84 in 2.13 m
Wheel Base 100 in 2.54 m
Wheel Track 72 in 1.83 m
Turning Radius Inside 8 ft 2.44 m
Outside 16 ft 8 in 5.08 m
Ground Clearance 10 in 25 cm
Machine Weight** (Unloaded)(Approximate) 7800 lb** 3535 kg** 8100 lb** 3674 kg**
Drive System (Proportional)
Drive Speed - Platform elevated 0-.4 mph 0-.6 km/h
Drive Speed - Platform lowered 0-3.2 mph 0-5 km/h
Lift/Lower Speeds (Approximate) 35 sec/40 sec
Gradeability 40% 22°
Ground Pressure/Wheel (Maximum) 90 psi 6.3 kg/cm 94 psi 6.6 kg/cm
Wheel Load 2855 lb 1295 kg 2965 lb 1345 kg
Wind Speed (Maximum) 28 mph 45 km/h (12.5 m/s)
Tire Size - Standard 26 x 12D / 380NHS
Tire Pressure 45 psi 3.1 bar
Foam-filled tires are standard in Europe and Australia,
optional in North America
Wheel Lug Nut Torque 75-85 ft/lb 102-115 Nm
Hydraulic Pressure Main System 2800 psi 193 bar
Lift System 2800 psi 193 bar
Steering System 2000 psi 138 bar
Hydraulic Fluid Capacity 23 gallon 87 liters
Engine Diesel -- Kubota D1105E, 25HP (18.6 kW), Liquid Cooled
Dual Fuel (North America only) -- Kubota DF752, 20HP
(14.9 kW), Liquid Cooled,
Noise Level 86 dB maximum
Maximum Vibration does not exceed 2.5 m/sec at operator’s position
Ambient Operating Range -30° C minimum; 50° C maximum
Operating Inclination Manual and self-leveling, side/side to 14°, fore/aft to 10°
Brakes Dual Rear Wheel Multi-disc
*Working Height adds 6 feet (2 m) to platform height.
**Weight may increase with certain options or country standards.

“Speed Level™ Sigma Lifts” Service and Parts Manual May 2010
Page III
M ACHINE S PECIFICATIONS - ES M ODELS
2684ES 3084ES
Working Height* 32 ft* 10.0 m* 36 ft* 11.0 m*
Platform Height 26 ft 7.9 m 30 ft 9.0 m
Stowed Height Rails Up 107 in 2.72 m 105 in 2.67 m
Rails Folded Down 72 in 1.83 m 70 in 1.78 m
Maximum Occupants 0 m/s wind 5 5
45 km/h (12.5 m/s) wind 5 5
On Slide-Out Extension 2 N/A
Lift Capacity 1700 lbs 770 kg 1500 lbs 680 kg
Slide-Out Deck Capacity 700 lbs 320 kg N/A
Platform Dimensions Length (inside rails) 12 ft 2 in 3.71 m 14 ft 4.27 m
Length (platform extended) 16 ft 2 in 4.93 m N/A
Platform Width (inside rails) 72 in 1.83 m 72 in 1.83 m
Guardrail Height 43.5 in 1.1 m 43.5 in 1.1 m
Toeboard Height 6 in 15 cm 6 in 15 cm
Overall Length 13 ft 2 in 4.0 m 14 ft 6 in 4.4 m
Overall Width 84 in 2.13 m
Wheel Base 100 in 2.54 m
Wheel Track 72 in 1.83 m
Turning Radius Inside 8 ft 2.44 m
Outside 16 ft 8 in 5.08 m
Ground Clearance 10 in 25 cm
Machine Weight** (Unloaded)(Approximate) 8400 lb** 3810 kg** 8700 lb** 3946 kg**
Drive System (Proportional)
Drive Speed - Platform elevated 0-.4 mph 0-.6 km/h
Drive Speed - Platform Lowered 0-3.2 mph 0-5 km/h
Lift/Lower Speeds (Approximate) 35 sec/40 sec
Gradeability 40% 22°
Ground Pressure/Wheel (Maximum) 98 psi 6.9 kg/cm 101 psi 7.1 kg/cm
Wheel Load 3065 lb 1390 kg 3175 lb 1440 kg
Wind Speed (Maximum) 28 mph 45 km/h (12.5 m/s)
Tire Size - Standard 26 x 12D / 380NHS
Tire Pressure 45 psi 3.1 bar
Foam-filled tires are standard in Europe and Australia,
optional in North America
Wheel Lug Nut Torque 75-85 ft/lb 102-115 Nm
Hydraulic Pressure Main System 2800 psi 193 bar
Lift System 2800 psi 193 bar
Steering System 2000 psi 138 bar
Hydraulic Fluid Capacity 23 gallon 87 liters
Electric Motor 8 hp (6kW): 3600 rpm
Power Source -- Voltage 48 volts DC
Batteries Eight 6-volt DC 370 amp-hour industrial deep cycle batteries
Battery Charger Input 120 Volt AC, 50.60 Hz, 18 Amp - 240 Volt AC, 50.60 Hz, 9 Amp
Output 48 Volt DC, 32 Amp, 1500 W, Timed Shutoff
Maximum Vibration does not exceed 2.5 m/sec at operator’s position
Ambient Operating Range -30° C minimum; 50° C maximum
Operating Inclination Manual and self-leveling, side/side to 14°, fore/aft to 10°
Brakes Dual Rear Wheel Multi-disc
*Working Height adds 6 feet (2 m) to platform height.
**Weight may increase with certain options or country standards.

“Speed Level™ Sigma Lifts” Service and Parts ManualMay 2010
Page IV
MEC O PERATOR P OLICY
NOTE: The best method to protect yourself and others from injury or death is to use common sense. If you are unsure
of any operation, don’t start until you are satisfied that it is safe to proceed and have discussed the situation with
your supervisor.
Service personnel and machine operators must understand and comply with all warn-
ings and instructional decals on the body of the machine, at the ground controls, and
platform control console.
MODIFICATIONS OF THIS MACHINE FROM THE ORIGINAL DESIGN AND
SPECIFICATIONS WITHOUT WRITTEN PERMISSION FROM MEC ARE STRICTLY
FORBIDDEN. A MODIFICATION MAY COMPROMISE THE SAFETY OF THE
MACHINE, SUBJECTING OPERATOR(S) TO SERIOUS INJURY OR DEATH.
MEC’s policies and procedures demonstrate our commitment to Quality and our relent-
less ongoing efforts towards Continuous Improvement, due to which product specifica-
tions are subject to change without notice.
Any procedures not found within this manual must be evaluated by the individual to
assure oneself that they are “proper and safe.”
Your MEC Aerial Work Platform has been designed, built, and tested to provide many
years of safe, dependable service. Only trained, authorized personnel should be
allowed to operate or service the machine.
MEC, As Manufacturer, Has No Direct Control Over Machine Application And Opera-
tion. Proper Safety Practices Are The Responsibility Of The User And All Operating
Personnel.
If there is a question on application and/or operation contact:
MEC Aerial Work Platform
1401 S. Madera Avenue
Kerman, CA 93630 USA
Ph: 1-800-387-4575
www.mecAWP.com

“Speed Level™ Sigma Lifts” Service and Parts Manual May 2010
Page V
S AFETY S YMBOLS
To help you recognize important safety information, we have identified warnings and instructions
that directly impact on safety with the following signals:
“DANGER” INDICATES AN IMMINENTLY HAZARDOUS SITUATION WHICH, IF
NOT AVOIDED, WILL RESULT IN DEATH OR SERIOUS INJURY.
THIS SIGNAL WORD IS LIMITED TO THE MOST EXTREME SITUATIONS.
“WARNING” INDICATES A POTENTIALLY HAZARDOUS SITUATION WHICH, IF
NOT AVOIDED, COULD RESULT IN DEATH OR SERIOUS INJURY.
“CAUTION” indicates a potentially hazardous situation which, if not avoided, may
result in minor or moderate injury. It may also be used to alert against unsafe
practices.
“Caution” without alert symbol indicates a situation which, if not avoided, may
result in property damage.

“Speed Level™ Sigma Lifts” Service and Parts ManualMay 2010
Page VI
G ENERAL S AFETY T IPS
Regular inspection and conscientious maintenance is the key to efficient economical oper-
ation of your aerial work platform. It will help to assure that your equipment will perform
satisfactorily with a minimum of service and repair.
The actual operating environment of the machine governs the inspection schedule. Cor-
rect lubrication is an essential part of the preventative maintenance to minimize wear on
working parts and ensure against premature failure. By maintaining correct lubrication, the
possibility of mechanical failure and resulting downtime is reduced to a minimum.
NEVER PERFORM SERVICE ON THE MACHINE WITH THE PLATFORM ELEVATED
WITHOUT FIRST SUPPORTING THE PLATFORM/BOOM ASSEMBLY.
Figure 1-1: Support Platform
• Use a crane with chains and straps of adequate lifting
capacity to support the platform.
• Never leave hydraulic components or hoses open. They
must be protected from contamination (including rain)
at all times.
• Never open a hydraulic system when there are contam-
inants in the air.
• Always clean the surrounding area before opening
hydraulic systems.
• Use only recommended lubricants. Improper lubricants
or incompatible lubricants may be as harmful as no
lubrication.
• Watch for makeshift “fixes” which can jeopardize safety
as well as lead to more costly repair.
Art_3098

“Speed Level™ Sigma Lifts” Service and Parts Manual May 2010
Page VII
H YDRAULIC S YSTEM
HYDRAULIC FLUID UNDER PRESSURE CAN PENETRATE AND BURN SKIN,
DAMAGE EYES, AND MAY CAUSE SERIOUS INJURY, BLINDNESS, AND EVEN
DEATH.
CORRECT LEAKS IMMEDIATELY.
Hydraulic fluid leaks under pressure may not always be visible. Check for pin hole
leaks with a piece of cardboard, not your hand.
E LECTRICAL S YSTEM
Prevent damage to battery and/or electrical system;
• Always disconnect the negative battery cable first.
• Always connect the positive battery cable first.
When the negative cable is installed, a spark will occur if contact is made between the
positive side of the battery and a metal surface on the machine. This can cause damage
to the electrical system, battery explosion, and personal injury.
T OTAL S YSTEM
Engine coolant level must be checked only after engine has cooled. If radiator cap
is removed while the coolant is at normal operating temperature, pressure within
the coolant system will force hot liquid out through the filler opening and may
cause severe scalding.
Failure to perform preventive maintenance at recommended intervals may
result in the unit being operated with a defect that could result in injury or
death of the operator.
Immediately report to your supervisor any defect or malfunction. Any defect
shall be repaired prior to continued use of the aerial work platform.
Inspection and maintenance should be performed by qualified personnel
familiar with the equipment.

“Speed Level™ Sigma Lifts” Service and Parts ManualMay 2010
Page VIII
P RIMARY M ACHINE C OMPONENTS
Figure 1-2: Component Locations
ART_3090
Lanyard Points
(Option)
91859
91843
Document Box
Ladder
Boom Support Wheel
Lift Cylinder
Upper Controls
Pivot Gear
Tilt Cylinder
Front to Rear
Upper Boom
Control Module
Lower Controls
Propane Tank
Dual Fuel Models
Platform and Rails
Lower Boom
Power Module
Tilt Cylinder
Side to Side
Steering Components
Front Drive Motors
Axle Float Cylinders
Rear Drive Motors
Entry Gate
Loading Gate

“Speed Level™ Sigma Lifts” Service and Parts Manual May 2010
Page IX
Figure 1-3: Component Locations, Modules
ART_3089
Control Module
Power Module
Battery
Disconnect Switch
Alarm
Terminal Block
Module
GP400 Module
12 Volt DC Battery
Emergency
Lowering Switch
Lower Controls
Hydraulic
Reservoir
Overflow
Reservoir
Radiator
Fuel
Reservoir
Hydraulic Fluid
Filter Engine Air Intake
Engine Air Filter
Hydraulic Fluid
Sight Gauge
Hydraulic Fluid
Pump
Engine
Relays
Main
Hydraulic
Manifold
Leveling
Hydraulic
Manifold
Power to Platform
AC Connector

“Speed Level™ Sigma Lifts” Service and Parts ManualMay 2010
Page X
T ORQUE S PECIFICATIONS
F ASTENERS
Use the following values to apply torque unless a specific torque value is called out for
the part being used.
H YDRAULIC C OMPONENTS T ORQUE T ABLE
NOTE: Always lubricate threads with clean hydraulic fluid prior to installation.
Use the following values to torque hydraulic components when a specific value is not
available. Always check for torque values in the following places before relying on the
Hydraulic Components Torque Table;
• parts drawings and service instructions in this manual.
• packaging and instruction sheets provided with new parts.
• instruction manuals provided by the manufacturer of the component being serviced.
SAE GRADE
TORQUE
FT. LBS
MIN MAX
TORQUE
Nm
MIN MAX
FT. LBS
MIN MAX
Nm
TORQUE
FT. LBS
TORQUE
Nm FT. LBS Nm
MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX
CAP SCREW
SIZE
- millimeters-
CAP SCREW
SIZE
- inches -
58 METRIC GRADE 8.8 10.9
8.8 10.9
1/4 - 20 6.25
8
14
17.5
26
31
41
51
65
76
95
111
126
152
238
274
350
407
537
670
7.25
9
15
19
28
34
45
55
72
84
105
123
139
168
262
302
386
448
592
740
8.5
11
19
23
35
42
55.5
69
88
103
129
150
171
206
322
371
474
551
728
908
10
12
20
26
38
46
61
74.5
97.5
114
142
167
188
228
255
409
523
607
802
1003
8.25
10.5
18.5
23
35
41
55
68
86
102
127
148
168
203
318
365
466
543
716
894
9.5
12
20
25
37
45
60
75
96
112
140
164
185
224
350
402
515
597
790
987
11
14
25
31
47.5
55.5
74.5
92
116
138
172
200
228
275
431
495
631
736
970
1211
13
16
27
34
50
61
81
102
130
152
190
222
251
304
474
544
698
809
1070
1137
M6 X 1.00
M8 X 1.25
M10 X 1.50
M12 X 1.75
M14 X 2.00
M16 X 2.50
M18 X 2.50
M20 X 2.50
M22 X 2.50
M24 X 3.00
M27 X 3.00
M3 X 3.00
6
16
29
52
85
130
172
247
332
423
637
872
8
20
35
62
103
158
210
301
404
517
779
1066
8
21.5
39
70
115
176
233
335
450
573
863
1181
11
27
47
84
139
214
284
408
547
700
1055
1444
9
23
42
75
120
176
240
343
472
599
898
1224
11
27
52
91
146
216
294
426
576
732
1098
1496
12
31
57
102
163
238
325
465
639
812
1217
1658
15
36.5
70
123
198
293
398
577
780
992
1488
2027
1/4 - 28
5/16 - 18
5/16 - 24
3/8 - 16
3/8 - 24
7/16 - 14
7/16 - 20
1/2 - 13
1/2 - 20
9/16 - 12
9/16 - 18
5/8 - 11
5/8 - 18
3/4 - 10
3/4 - 16
7/8 - 9
7/8 - 14
1 - 8
1 - 14
Torque valuesapply to fasteneersasreceived
from the supplier, dry or when lubricated with
normal engine oil.
If special graphite grease, molydisulphide
grease, or other extreme pressure lubricants
are used, these torque valuesdo not apply.
AMERICAN STANDARD CAP SCREWS METRIC CAP SCREWS
TYPE: SAE PORT SERIES CARTRIDGE POPPET FITTINGS HOSES
FT. LBS Nm
#4
#6
#8
#10
#12
#16
N/A
N/A
25 - 30
35 - 40
85 - 90
130 - 140
N/A
N/A
31 - 41
47 - 54
115 - 122
176 - 190
FT. LBS Nm
N/A
10 - 20
25 - 30
35 - 40
85 - 90
130 - 140
N/A
14 - 27
34 - 41
47 - 54
115 - 122
176 - 190
FT. LBS Nm
135 - 145
215 - 245
430 - 470
680 - 750
950 - 1050
1300 - 1368
15 - 16
24 - 28
49 - 53
77 - 85
107 - 119
147 - 155

“Speed Level™ Sigma Lifts” Service and Parts Manual May 2010
Page XI
E MERGENCY S YSTEMS AND P ROCEDURES
IF THE CONTROL SYSTEM FAILS WHILE THE PLATFORM IS ELEVATED, HAVE
AN EXPERIENCED OPERATOR USE THE EMERGENCY LOWERING PROCEDURE
TO SAFELY LOWER THE PLATFORM.
DO NOT ATTEMPT TO CLIMB DOWN ELEVATING ASSEMBLY.
E MERGENCY S TOP
The machine is equipped with an EMERGENCY STOP switch on both control panels.
• Press the EMERGENCY STOP switch at any time to stop all machine functions.
• Turn switch clockwise to reset.
S ELECTOR S WITCH SET TO PLATFORM
• Either switch will stop all machine functions.
• Both switches must be reset or machine will not operate.
S ELECTOR S WITCH IS SET TO BASE
• The upper controls are locked out.
• The lower controls switch must be reset or the machine will not operate.
• The machine will operate from the lower controls if the upper controls switch is tripped.
E MERGENCY L OWERING
The Emergency Lowering System is used to lower the platform in case of power failure.
The Emergency Lowering switch *will* continue to function if the EMERGENCY STOP
switch is tripped.
To lower the platform, perform the following steps:
• Push and hold the toggle switch down to lower the platform.
• Once the platform is fully lowered, release the toggle switch.
Figure 1-4: Emergency Lowering Switch
ART_3107
91843
Emergency Stop Switch
UpperControls
LowerControls
Emergency Lowering Switch

“Speed Level™ Sigma Lifts” Service and Parts ManualMay 2010
Page XII
P ARKING B RAKE AND T OWING C IRCUIT
The machine can be winched or moved short distances in case of power failure at
speeds not to exceed 5 MPH (8.05 km/h). Before towing or winching the machine, it is
necessary to release the brake. Reset the brakes after winching or towing.
AFTER DISENGAGING BRAKES THERE IS NOTHING TO STOP THE MACHINE’S
TRAVEL. MACHINE WILL ROLL FREELY ON SLOPES. BE ON GUARD AGAINST
RUNAWAY.
Prior to manually releasing brakes, insure wheels are chocked to prevent
unintentional movement.
D ISENGAGE B RAKES B EFORE T OWING :
• Chock the wheels.
• Push and hold release valve.
• Using the hand pump on the manifold, pump valve until pressure is built and valve cannot be
pumped.
• Machine is now ready for towing.
Figure 1-5: Disengage Brakes
E NGAGE B RAKES B EFORE
D RIVING :
• Pull out the manual brake release
valve to reset brakes.
NOTE: Brakes will reset automatically when drive
function is activated.
ART_2423
Hand Pump Release Valve

“Speed Level™ Sigma Lifts” Service and Parts Manual May 2010
Page XIII
L IFT AND S UPPORT THE M ACHINE
DEATH OR SERIOUS PERSONAL INJURY MAY RESULT FROM THE USE OF
SUBSTANDARD LIFTING DEVICES AND/OR JACK STANDS. ENSURE THAT ALL
LIFTING DEVICES AND JACK STANDS ARE OF ADEQUATE CAPACITY AND IN
GOOD WORKING CONDITION BEFORE USE.
The following are needed to safely lift and support the machine;
• a jack with a lifting capacity of two (2) tons or more.
• jack stands with a rating of two (2) tons or more.
T O RAISE THE MACHINE
1. Move machine to a firm level surface capable of supporting the weight of the
machine.
2. Chock tires on one end of machine and raise the other end of machine.
3. If wheel is to be removed, break loose but do not remove lug nuts before raising the
machine.
4. Position a jack at the end of the machine to be lifted, under a solid lifting point in the
center of the frame.
5. Raise the machine and place two (2) suitable jack stands under solid support points
at the outer ends of the frame.
6. Lower the machine to rest on the jack stands and inspect for stability.
T O LOWER THE MACHINE
1. Tighten lugs to proper torque (refer to machine specifications).
2. Raise machine slightly and remove jack stands.
3. Lower the machine and remove the jack.
4. Remove chocks.

“Speed Level™ Sigma Lifts” Service and Parts ManualMay 2010
Page XIV
T RANSPORTING THE M ACHINE
S AFETY I NFORMATION
THIS INFORMATION IS PROVIDED FOR REFERENCE AND DOES NOT
SUPERSEDE ANY GOVERNMENT OR COMPANY POLICY REGARDING THE
LOADING, TRANSPORT OR LIFTING OF MEC MACHINERY.
DRIVERS ARE RESPONSIBLE FOR LOADING AND SECURING MACHINES,
AND SHOULD BE PROPERLY TRAINED AND AUTHORIZED TO OPERATE MEC
MACHINERY.
DRIVERS ARE ALSO RESPONSIBLE FOR SELECTING THE CORRECT AND
APPROPRIATE TRAILER ACCORDING TO GOVERNMENT REGULATIONS
AND COMPANY POLICY.
DRIVERS MUST ENSURE THAT THE VEHICLE AND CHAINS ARE STRONG
ENOUGH TO HOLD THE WEIGHT OF THE MACHINE (SEE THE SERIAL
NUMBER PLATE FOR MACHINE WEIGHT).
D RIVING OR W INCHING ONTO OR OFF OF A T RANSPORT V EHICLE
MEC DOES NOT RECOMMEND UNASSISTED LOADING OR UNLOADING.
ALWAYS ATTACH THE MACHINE TO A WINCH WHEN LOADING OR UNLOADING
FROM A TRUCK OR TRAILER BY DRIVING.
Refer to the Operator’s Manual for loading, unloading, driving and operating instruc-
tions.
Figure 1-6: Loading the Machine
Winch
ART_3086