Frame straightening can be complicated and usually requires special equipment. Only qualified technicians can perform the frame straightening procedure.
Perform a complete analysis of the condition of the frame before taking any steps to straighten the frame. Analyzing the cause of failure will determine the correct sequence of steps in the repair. Refer to Minimizing Frame Service Description . Use corrective procedures to reverse the flow of damaging forces. Apply pressure, in many cases, from different directions at the same time to reverse the flow of forces.
Use controlled heat carefully. The major sources of trouble are the following conditions:
- Too much heat.
- Too little heat.
- Improper application of heat.
Remove all the protective coating material before using a flame to prevent a fire. Reapply the protective coating after the repair has been completed. Heat the frame with a large multi-hole heating tip. Use a neutral frame. Heat the area that will be stretched while the frame is straightened. After sufficient pressure has been exerted, heat the area to cause a slight checking, or silvery cracks, to appear on the surface of the metal. Gradually increase the pressure while heating. Do NOT heat beyond 606°C (1200°F). A red glow indicates that the material is overheated. Overheating causes distortion and stretching. Overheating causes a change in the characteristics of the metal.
