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discount tire speedometer calibration
How to discount tire speedometer calibration：Incorrect speed indication: Mechanism dirty or buttery; not properly calibrated; pointer out of balance. If the indicated speed changes, it means that the pointer or the speed circle Disk is unbalanced. The speed is incorrect, more than half of the scale; the hairspring is touched; the magnetic cone stator is not concentric with the speed disc; the pointer cylinder is unbalanced.To perform a speedometer calibration test, first let the gauge turn freely, then place it on the test bench, run it at different speeds, and compare the speedometer to the standard needle reading on the test bench. Run the speedometer on the test bench and pay attention to the noise, which should be lower than the required standard.
The first step required to detect a malfunction of the speed control system is to visually inspect the following items:
(1) Check whether all visible parts of the system are abnormal, check whether the wires are peeled off, and whether the vacuum hose is damaged. All hoses should be branched correctly and connected securely;
(2) The speedometer cord must also be positioned correctly and must not be excessively bent or twisted together. The joint should be firm;
(3) The servo mechanism (that is, the throttle actuator) and the pull rod should work smoothly;
(4) The empty stroke of the chain should not be greater than 1/4 inch;
(5) The electrical connector must be complete and firm;
(6) The wire harness must be neat and tidy. Check for peeling insulation, loose connections or shorts; make the necessary corrections above before continuing with other checks.
If you replace the rims and tires that do not match the original specifications, the speedometer and trip meter will be inaccurate. Of course, it is recommended that riders must not modify the rims and tires of their cars casually, as this will affect the accuracy of the speedometer and trip meter. If the rims and tires are modified, there is no way to adjust the speedometer. The tire is the only part of the car that is in contact with the ground, and the tire is very important to the driving stability and driving safety factor.
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