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T-12-UT
Table of Contents
Section 1.
Operation .................................................................................... 3
1.0
Introduction ................................................................................... 3
1.1
Purpose ........................................................................................ 3
1.2
Rating ............................................................................................ 3
1.3
Design and Safety Factors ........................................................... 4
1.4
Vehicle Load and Handling Limits ................................................ 4
1.5
Reporting Safety Defects ............................................................. 7
1.6
Alert Symbols ................................................................................ 8
1.7
Pre-Trip Inspection ........................................................................ 9
1.8
Hook-Up Procedures .................................................................. 10
1.9
Loading and Unloading .............................................................. 11
Trailers With Ramps ................................................................. 12
Trailers With Tilt Decks ............................................................. 12
Section 2.
Maintenance .............................................................................. 13
2.0
Periodic Maintenance ................................................................. 13
2.1
Structural Components ............................................................... 14
Sub-Frame ................................................................................ 14
Deck .......................................................................................... 14
2.2
Sub-Assembly Components ....................................................... 14
Coupling ................................................................................... 14
Jack .......................................................................................... 15
Cushion Cylinder ...................................................................... 15
Deck Latch ................................................................................ 15
Deck Hinge Assembly ............................................................... 15
2.3
Running Gear ............................................................................. 16
Suspension ............................................................................... 16
Hubs and Drums ....................................................................... 16
Brake Drum Inspection ............................................................. 17
Bearing Inspection .................................................................... 17
Standard Bearing Lubrication ................................................... 18
E-Z Lube Bearing Lubrication .................................................. 18
Seal Inspection and Replacement ........................................... 19
Hub Reinstallation and Bearing Adjustment ............................ 19
2.4
Wheels and Tires ........................................................................ 20
Wheels ..................................................................................... 20
Tires .......................................................................................... 22
Inflation Pressure ..................................................................... 22
Tire Wear Diagnostic Chart ...................................................... 23
2.5
Electrical ..................................................................................... 24
Harnesses and Lights ............................................................... 24
Junction Block .......................................................................... 24
Electrical Plug ........................................................................... 24
Contents
Revision F 02/25/05
