- 1 decade agoFavorite Answer
The screw jump off due to no thread in screw hole of upper cover, cause customer bad complain.
Anomaly analyze below.
This is fixed vent cover, so needs to loosen the cover for change direction when require for exhaust reverse. The screw has stripped might be customer over tighten the screw when re-fix. The correct toque should be 60~85in-lb.
If the vent cover’s screw has not been tighten correctly, it may cause vent cover brunt up due to shake and exhaust while the staple gun is use which also cause vent cover become loose. During the period has caused alum cover thread damaged and the bolt can not use origin toque value to fixed after server tighten action, then the cover and screw will jump off while exhaust and will have anomalous. (Due to strength the upper cover made by alum, and screw made by steel)
With above situation or the screw can not be tighten, please change the upper cover immediately, because the vent cover can not be fixed now.Source(s): 自己
- 1 decade ago
The top head 螺絲孔 does not have the tooth number, causes the screw to spring, creates strictly 重客 sues
Unusual reason analysis as follows:
1. This for stationary exhaust lid, therefore when needs to change the exhaust direction, then must exhaust covers the screw pine to open only then may change the direction, also therefore has the possibility consumer in again the applied time torsion oversized, but creates on the top head the thread slippery tooth. The correct torsion value is 60~85in-lb
2. The similar situation when locks the solid exhaust covers the screw, by no means truly the applied, causes the nail gun uses when when the vibration and the exhaust the upward impact exhaust lid causes the exhaust to cover gradually 鬆脫, but created the aluminum system top head spiral tooth in this process to wear, then after passed through on repeatedly 緊螺 the tooth movement, this time spiral tooth has been unable to withstand the original torsion, then had the exhaust to cover and the screw because does moves the abnormal phenomenon which after the pumping action sprang. (The intensity factor, the top head is the aluminum product, the screw is made of iron. )
3. Above when has the phenomenon perhaps the screw already is unable the locking, please immediately replaces the top head, therefore time exhausted covers already is unable to lock completely firmly.