CHECKING CHASSIS FRAME USING PLUMB BOB

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AIM:
CHECKING CHASSIS FRAME BY USING A PLUMB BOB

TOOLS REQUIRED

1. PLUMB BOB
2. MEASURING TAPE
3. MALLET
4. BALL PEEN HAMMER
5. RIVETS & GUN

MATERIALS REQUIRED

1. MANUFACTURER'S DIAGRAM
2. CHALK PIECE
3. COTTON WASTE 

PROCEDURE

1. Check the chassis frame visually for cracks and major damage. If any major damage is found send the chasis frame for repair.

2. Mark a diagram on the floor according to the manufacturer's specification (in-line and diagonal).

3. Place the frame on the floor of the diagram.

4. Check the diagonal and in-line measurement of the frame on the floor.

5. If the frame is bent or twisted its side members (1) and cross-member's (2) points will not align with the floor diagram. If the deviation found is more than the specified limits of the manufacturer, send the frame for repair.

6. Place the frame on the horse support and coincide the same with the floor diagram.

7. Make a number of plumb bob point (3) marks, where the plumb bob point touches on the ground.

8. Mark the diagram where the plumb bob touches, and make a diagram.

9. Compare the plumb bob's diagram with the manufacturer's diagram.

10. By using a plumb bob measure the height of the frame from the floor at different places.

11. If there is any difference between the heights then the frame has sagging. Send it for repair.

12. Inspect the rivets of the frame by hitting with a ball pein hammer. Loose rivets will give a dull sound; change the particular rivets or send the frame for repair.

RESULT

The checking of chassis frame done successfully.

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