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Depending on the condition of wheels, bolts, nuts and other fastening parts, fastening with PTS may damage bolts.
( Hereinafter this condition will be referred to as "abnormal fastening").
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This machine has the function to immediately detect this "abnormal fastening" and shut down to prevent bolts and
other parts from damages.
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When "abnormal fastening" is detected, "CH1"( CHECK1 ) is displayed on the controller and the machine stops.
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When "CH1" ( abnormal fastening ) is displayed, check the following.
【１】If "CH1"(abnormal fastening) is displayed, please remove the nut.
(Caution)
If the wheel nut is made up of the inner nut and the outer nut, please make sure to fasten the inner nut
with recommended torque after loosening the outer nut.
If "CH1" is displayed, do not continue fastening. Loosen the bolt / nut first.
Otherwise the bolt may be stretched or the wheel may be deformed.
【2】 Please check the following;
1) Whether the wheel center is misaligned to the wheel bolt.
2) Whether there are any damages on the seating surface of wheels and nuts and thread face.
・ Replace the parts when there are damages or unevenness of the seating surface.
3) Whether the wheel bolt is stretched.
・ If so, replace with the new bolt.
Try to fasten the nut by hand. If the nut can not be fastened smoothly to the end, the bolt must be replaced.
4) Whether the torque is appropriate.
・ Please refer the specified value of respective automobile manufacturer.
5) Whether the amount of grease applied on the surface is appropriate.
・
In particular, excessive grease application on the aluminum wheel is a cause of excessive axial force
generation.** Please pay full attention to the amount and portion of application so that "the specified
grease applied in a thin layer on the portion specified by the automotive manufacturer".
** Axial Force : Force to pull the bolt (Fastening force)
【3】 After examine bolts, nuts and others for abnormality or changing to new parts, please fasten nuts with extra
pre-tightening.
(Caution)
If the wheel nut is made up of the inner nut and the outer nut, please make sure to fasten the inner nut
with recommended torque after loosening the outer nut.
Warning
Trouble Shooting (3)
How to deal with [CH1] Abnormal fastening
