4.3.2
Output drive type A
Application
●
Output drive for rising, non-rotating valve stem
●
Capable of withstanding thrust
4.3.2.1
Stem nut: finish machining
✔
This working step is only required if stem nut is supplied unbored or with pilot
bore.
Figure 7:
Design of output drive type A
[1]
Stem nut
[2]
Bearing
[2.1] Bearing race
[2.2] Bearing rim
[3]
Spigot ring
1.
Remove spigot ring [3] from output drive.
2.
Remove stem nut [1] together with bearings [2].
3.
Remove bearing races [2.1] and bearing rims [2.2] from stem nut [1].
Information: From sizes A 35.2 – 48.2: Record the order of the bearing races
[2.1].
4.
Drill and bore stem nut [1] and cut thread.
Information: When fixing in the chuck, make sure stem nut runs true!
5.
Clean the machined stem nut [1].
6.
Apply sufficient Lithium soap EP multi-purpose grease to bearing rims [2.2] and
bearing races [2.1], ensuring that all hollow spaces are filled with grease.
7.
Place greased bearing rims [2.2] and bearing races [2.1] onto stem nut [1].
Information: From sizes A 35.2 – 48.2: Respect correct order of bearing races
[2.1].
8.
Re-insert stem nut [1] with bearings [2] into output drive.
Information: Ensure that dogs or splines are placed correctly in the keyway of
the hollow shaft.
9.
Screw in spigot ring [3] until it is firm against the shoulder.
11
SA 25.1 – SA 48.1/SAR 25.1 – SAR 30.1
Assembly