Question

The rubber grommet on standard tr570-series brass valve stems used on steel rims must be lubricated before applying the installation torque of 35*5 in-lb?

Answer 1

The rubber grommet on standard tr570-series brass valve stems used on steel rims does not need to be lubricated before applying the installation torque of 35*5 in-lb. Hence, the statement is false.

The rubber grommet on standard tr570-series brass valve stems used on steel rims does not need to be lubricated before applying the installation torque of 35*5 in-lb. The rubber grommet is designed to create a tight seal between the valve stem and the rim, preventing air leakage. The torque specification of 35*5 in-lb ensures that the valve stem is tightened to the correct level without over-tightening.

However, it is important to note that lubricating the rubber grommet can make it easier to install the valve stem and reduce friction during the process. If you choose to lubricate the grommet, it is recommended to use a suitable lubricant that is compatible with rubber and does not degrade its performance.

To summarize:

1. Lubricating the rubber grommet is not necessary for installing tr570-series brass valve stems on steel rims.
2. The specified installation torque of 35*5 in-lb should be applied to secure the valve stem.
3. Lubrication can be used if desired, but it is important to choose a compatible lubricant that does not harm the rubber grommet.

Remember, it is always a good practice to refer to the manufacturer's guidelines or consult with a professional when performing any installation or maintenance procedures.

Complete question :-

The rubber grommet on standard tr570-series brass valve stems used on steel rims must be lubricated before applying the installation torque of 35*5 in-lb? True or False?

Answer 2

The question deals with the importance of lubricating the rubber grommet of a brass valve stem during installation to achieve the correct torque. Lubrication helps reduce friction, prevent damage, and ensure a better seal, but it also affects the force needed to achieve the specified torque.

Step-by-step explanation:

The question pertains to the application of torque when installing a brass valve stem on steel rims, specifically addressing whether the rubber grommet requires lubrication before applying the specified installation torque of 35*5 in-lb. In practice, lubricating the rubber grommet can help in several ways: it can facilitate the fitting process by reducing friction, prevent potential damage to the grommet during installation, and ensure a better seal. However, the primary concern in this context is achieving the appropriate torque during installation. When the surface is lubricated, less force is required to achieve the same level of torque as for a dry surface, thus impacting the final tightness. For the accurate application of torque, it's essential to consider the frictional differences caused by lubrication and to adjust the applied force accordingly.