Mounting To Valve; Gk10.1-The Output Drive Flange Must Be Removed From The Gearbox - AUMA ABG 10.2 Operation And Maintenance Manual

4. Mounting to valve

The gearboxes can be operated in any mounting position.

Prior to mounting, the gearbox must be checked for damage. Damaged parts must be replaced
by original spare parts.

After mounting to valve, touch up any possible damage to paint finish.

Check if mounting flange fits the gearbox.

Spigot at flanges should be loose fit!
For output drive type A (figure 2 or 3), the internal thread of the stem nut must match the thread of the
valve stem. If not ordered explicitly with thread, the stem nut is un-bored or with pilot bore when delivered.
For finish machining of stem nut, refer below.

Check whether bore and keyway match the input shaft of valve.

Thoroughly degrease mounting faces of gearbox and valve.

Apply a small quantity of grease to input shaft of valve.

Place gearbox on valve and fasten. Fasten bolts (quality min. 8.8, refer to table 1) evenly
crosswise.
Table: 1 Suggested fastener torques for bolts
Fastener thread size
UNC Metric
1/4"
M6
5/16"
M8
3/8"
M10
1/2" M12
5/8"
M16 158 [214]
3/4" M20
Finish machining of stem nut (output drive type A):
4.1 GK10.1-The output drive flange must be
removed from the gearbox
Refer to figure 2

Using a 10 mm wrench or similar tool, remove the four fasteners (01)
from the output drive type A of the GK10.1.

Remove the A drive assembly from the bevel gearbox and place on
a suitable clean surface.

Loosen the setscrew (02) using a 3 mm Allen wrench.

Rotate the locking ring (3) counter clockwise to unthread it from the
A drive housing.
Fastener torques ft-lb [Nm]
Strength class
8.8 A2-80
8 [11] 7 [10]
18 [25] 18 [24]
38 [51] 35 [48]
64 [87] 60 [82]
148 [200]
318 [431]
Page 5 of 12
289 [392]
Figure 2