Jackco Body Straightener Model 857 (w/1.2 Ton Crane & Swivel Post) - Manual (Page 3)

Frames and bodies are bent and distorted by collision with a relatively large area of the car bearing the impact.
However, the correction procedure utilizes, powerful, concentrated loads at key points which can cause local
crushing of frame members, etc., if these points are not property padded to spread the load over a large area.
Illustration of recommended anchoring procedures are shown below for efficient use of the under body anchoring
System.
Box frames and channel sections should be padded
with short pieces of angles iron to prevent damage to
the corner of the section when a chain is wrapped a-
round the frame section.
Proper anchoring for a heavy fore and aft pull utilizes
the underbody anchoring system as shown here.
For a diagonal pull, the underbody anchoring system
provides atachment to both rocker panels, for better
efficiency and less damage. The anchoring loads are
spread across both sides of the car. For pulling on one side only, it is best to attach the cross
tube to both rocker panels. Anchor your body straightener
to the cross tube. This will prevent unwanted rolling of the
underbody clamps on the pinch weld.
The underbody clamp secures to the pinch welds allows more
versatile positioning of the body straightener.
Cross Tube
24"Min
Pinch Weld
Pinch Weld
Cross Tube
24"Min
Pinch Weld
Pinch Weld
Cross Tube
Pinch Weld
Pinch Weld
HOW TO SET UP THE FRAME STARIGHTENER
2.