# MEASURING INFORMATION > DIAGRAM DESCRIPTION

HINT:

1. There are two types of dimensions in the diagram.
2. In cases in which only one dimension is given, left and right are symmetrical.
3. For symbols, capital letters indicate right side of vehicle, small letters indicate left side of vehicle (seen from rear).

Three-Dimensional Distance

1. Straight-line distance between the centers of two measuring points.

   Text in Illustration
   *1 | Distance between the centers of the measuring points

Two-Dimensional Distance

1. Horizontal distance in forward/rearward between the centers of two measuring points.

2. Distance from the Imaginary Datum Line.

   Text in Illustration
   *1 | Center-to-center horizontal distance in forward/rearward
   *2 | Vertical distance to center
   *3 | Vertical distance to lower surface
   *4 | Imaginary Datum Line

Imaginary Datum Line

1. The imaginary line used to measure height is a line which connects the points described in the following chart (actual dimensions are listed in the next chapter of this manual).

   Text in Illustration
   *1 | Under surface of the Rocker Panel
   *2 | Imaginary Datum Line

   Symbol | Measuring Points
   A | The place that was lowered <1> mm from the under surface of the rocker panel centered on the front jack up point.
   B | The place that was lowered <2> mm from the under surface of the rocker panel centered between A and C.
   C | The place that was lowered <3> mm from the under surface of the rocker panel centered on the rear jack up point.

Measurement

1. Basically, all measurements are to be done with a tracking gauge. For portions where it is not possible to use a tracking gauge, a tape measure should be used.

2. Use only a tracking gauge that has no looseness in the body, measuring plate, or pointers.

3. When using a tape measure, avoid twists and bends in the tape.

   Text in Illustration
   *1 | Tracking Gauge
   *2 | Master Gauge
   *3 | Pointer

HINT:

1. The height of the left and right pointers must be equal.

1. Always calibrate the tracking gauge before measuring or after adjusting the pointer height.

1. Take care not to drop the tracking gauge or otherwise shock it.

1. Confirm that the pointers are securely in the holes.