Question

Which of the following is good practice when greasing the kingpin steering knuckle on a heavy-duty truck?

a) remove the zerk fittings.
b) jack the front axle off the ground.
c) flush all the old grease out of the knuckle
d) heat with a rosebud.

Answer 1

When greasing the kingpin steering knuckle on a heavy-duty truck, it is good practice to remove the zerk fittings, jack the front axle off the ground, and it is not necessary to flush all the old grease out of the knuckle unless it is dirty or contaminated.

Step-by-step explanation:

When greasing the kingpin steering knuckle on a heavy-duty truck, it is good practice to remove the zerk fittings. This will allow for easier and more thorough greasing of the knuckle. Additionally, it is recommended to jack the front axle off the ground to relieve the weight on the knuckle and make it easier to access. Lastly, it is not necessary to flush all the old grease out of the knuckle unless it is dirty or contaminated.