Speedometer Head: Testing and Inspection

Speedometer Inspection:

Take note of the following before inspection
1. Assure tire pressure at standard value.
2. When placing the vehicle on a speedometer tester drum, make sure the center line of the vehicle is at right angles to the center line of the drum. Also, make sure the drum is positioned so as to center between the front tires.

Rear Wheel Safety Procedures
1. Be sure to chock both rear wheels to prevent the vehicle from moving. Secure the stoppers to the floor, or take measures to prevent the stoppers from slipping.
2. Make sure the parking brake has been set.

Front Wheel Sway Prevention Procedure
1. Attach anchoring bars on the tie-down brackets and secure their ends to the anchor plates.
2. Make sure the tension on the right and left bars is the same. Also be sure there is enough tension on each bar.

Accident Prevention Procedures
1. Attach a chain or wire to the rear tie-down holes. Make sure the end of the wire or chain is secured firmly.
2. Take all other necessary precautions.
Use a speedometer tester to measure the speedometer's indication error.

Standard Value:
Standard Indication Allowable Range
20 mph 19 - 22 mph
40 mph 38 - 44 mph
60 mph 57 - 66 mph
80 mph 76 - 88 mph
100 mph 94 - 110 mph