Nexen EMB-1125 965300 - Manual (Page 9)

9 FORM NO. L-21068-G-0711
BEARING, O-RING, SEALS, AND SPRINGS ASSEMBLY
NOTE: Refer to Figures 6 & 7.
1. Alternately and evenly, remove the 8 Socket Head Cap
Screws (Item 11) and separate the Air Chamber (Item 6)
from the Input Flange (Item 10).
2. Remove the Spring Backing Plate (Item 15), Piston (Item 5)
and Springs (Item 9) from the Air Chamber (Item 6). You
may need to apply compressed air to the air inlet to remove
the Piston.
3. Press in on the Output Shaft (Item 1) to separate it from the
Ball Bearing (Item 2).
4. Remove the old O-ring Seals (Items 3, 4) from the Piston
(Item 5).
5. Press the Ball Bearing (Item 2) out of the Air Chamber (Item
6).
6. Clean the bearing bore of the Air Chamber (Item 6) with
fresh solvent, removing all old Loctite®.
7. Apply a continuous bead of Loctite® 680 (green) around the
inner circumference of the bearing bore of the Air Chamber
(Item 6).
8. Carefully align the outer race of the new Bearing (Item 2)
with the bore of the Air Chamber (Item 6).
9. Supporting the Air Chamber (Item 6) and, pressing on
the outer race of the new Bearing (Item 2), press the new
Bearing into the Air Chamber.
10. Visually inspect the inner diameter grooves and the outer
diameter grooves of the Piston (Item 5) for debris. Clean
as necessary.
11. Coat the O-ring contact surfaces of the Air Chamber (Item
6), the Piston (Item 5), and the O-ring Seals (Items 3, 4) with
a thin film of O-ring lubricant and install the 2 new O-ring
Seals (3, 4).
12. Slide the Piston (Item 5) into the Air Chamber (Item 6).
13. Clean the friction surface of the Output Shaft (Item 1) and
the Air Chamber (Item 6) with solvent. Ensure that it is clean
and dry before installing the Friction Facing (Item 8) in Step
15.
14. While supporting the inner race of the new Ball Bearing (Item
2), press the Output Shaft (Item 1) into the new Bearing
(Item 2) and Air Chamber (Item 6).
15. Position the Friction Facing (Item 8) in the Air Chamber (Item
6) so the angled surfaces match up with the wall of the Air
Chamber and the tapered disc of the Output Shaft (Item
1).
FIGURE 6
FIGURE 7*
(continued)
NEMA SIZES: 184-256 TC
IEC SIZES: 100-132
Item 1
Item 2
Item 3
Item 4
Item 5
Item 6
Item 7
Item 14
Item 9
Item 10
Item 11
Item 15
Item 8
Item 14
*Number of springs varies depending on model.
CAUTION
Working with spring or tension loaded
fasteners and devices can cause injury.
Wear safety glasses and take the
appropriate safety precautions.
16. Replace the Backing Plate (Item 15), Springs (Item 9) and
Input Flange (Item 10).
17. Apply one drop of Loctite® 242 (blue) to the threads of each
of the 8 Socket Head Cap Screws (Item 11).
18. Reinstall and tighten the 8 Socket Head Cap Screws (Items
11), securing the Air Chamber (Item 6) to the Input Flange
(Item 10). Alternately tighten the (8) Cap Screws (Item
11) to keep the input flange parallel to the Air Chamber.
(Recommended tightening torque: 7.0-9.2 Nm [62-81 in-
lb].)