Condition
| Cause
| Action
|
Sag
|
| • | The vehicle is overloaded |
| • | The load distribution of the vehicle is uneven |
| • | Abrupt changes in section modulus |
| • | Improper body or accessory mounting, including the following situations: |
| - | Holes drilled in the flange of the frame rail |
| - | Too many holes in the web section of the rail |
| - | More than four holes in the same vertical line of the rail web |
| - | Welds on the flange, particularly across the flange or along the
edge of the flange |
| - | Cutting holes in the rail with a torch |
| - | Cutting notches anywhere on the rails |
| • | The use of improper equipment |
| Straighten
and reinforce the frame. Refer to
Frame Repair
.
|
Buckle or Side Sway
|
| • | Abrupt changes in section modulus |
| Straighten
and reinforce the frame. Refer to
Frame Repair
.
|
Diamond
|
| • | Towing another vehicle with a chain attached to one corner of
the frame |
| Straighten
and reinforce the frame. Refer to
Frame Repair
.
|
Twist
|
| • | Operating the vehicle on very rough terrain |
| Straighten
and reinforce the frame. Refer to
Frame Repair
.
|
Improper Tracking
|
| • | The frame is not aligned properly |
| • | Shifting of the front or rear axle |
| • | The wheels are out of alignment |
|
| • | Straighten and reinforce the frame. Refer to
Frame Repair
. |
| • | Realign and secure the axle. |
|
Cracks in the Web of the Rails
|
| • | Loose crossmember attaching bolts |
|
| • | Replace, or weld and reinforce the rail. |
| • | Locate the stressed area of the frame: |
| 1. | Ream the bolt holes and install larger bolts if necessary. |
|
