Nexen LSCB-32 923522 - Manual (Page 11)

FORM NO. L-21143-J-0413 11
Figure 8
2
15
4
4 4
19
5 5
Figure 7
6
2
15
7
12. Press the new Bearing (Item 10) onto the Piston.
NOTE: Do not install the new bearing into LSCB-32 until
the facings (Item 20) have been installed.
13. Press the Bearing (Item 6) out of the Air Chamber (Item
3).
14. Clean the new Bearing (Item 6) and Air Chamber (Item
3) surfaces and apply an adequate amount of Loctite ®
680 to evenly coat the outer race of the new bearing.
16. Install the new bearing (Item 6) into the Air Chamber
(Item 3), taking care to press on the outer diameter of
the bearing to prevent brinelling of the bearing races.
17. Remove the O-Rings (Items 12 & 13) from the Piston
(Item 11) and clean the piston so it is free of any
contaminants.
18. Install new O-Rings (Items 12 & 13) and apply a
generous amount of lubrication to the O-Rings and the
Air Chamber (Item 3) wall where they will be placed.
19. Remove the Retaining Rings (Item 7 & 14) from the
Pilot (Item 2) end of the unit.
20. Remove the Hub (Item 1) from the Pilot (Item 2).
21. Using the proper fixtures, press the old bearing (Item
6) out of the Pilot (Item 2).
NOTE: Be sure to use a fixture that will support the
Pilot (Item 3), keeping the pins from being damaged.
22. Clean the new Bearing (Item 6) and Pilot (Item 2)
surfaces and apply an adequate amount of Loctite ®
680 to evenly coat the outer race of the new bearing.
23. Press the new Bearing (Item 6) into the Pilot (Item 2).
REASSEMBLY
24. Apply NEVER-SEEZ® to the splines of the Hub (Item
1).
25. Support the outer race of the Air Chamber Bearing
(Item 6) and press the Hub into the Air Chamber.
26. Reinstall the Retaining Ring (Item 7).
27. Next insert the Piston-Bearing assembly into the Air
Chamber cavity. Use care to ensure proper alignment
with the pin or shoulder bolts.
LSCB-32HT only: Insert two piece facing (Item 20) into the
piston (Item 11). Attach the Thrust Plate (Item 20) to
the Piston (Item 11) using four pan head screws (Item
8). Torque the screws to 4.2 - 5.4 Nm [37 - 48 In-lbs].
Press the new bearing (Item 10) into the Thrust Plate
(Item 26).
[Note: Skip step 28 for LSCB-32]
28. Insert the conical Friction Facing (Item 20) into the
Piston by using small retaining pliers. Carefully position
the facing and move the Piston (if necessary) to ensure
positive engagement.
LSCB-54HT only: Insert Retaining Ring (Item 25) to secure
conical Friction Facing (Item 20).
NOTE: Once in position, it may be helpful to spread
the conical Friction Facing (Item 20) open by using
retaining ring pliers.
29. Reassemble the pilot by replacing (in order) the Facings
(Item 4), Friction Plates (Item 5), and Springs (Item 17)
on the Drive Pins (Item 15).
30. Position the Air Chamber/Hub combination down on
the Arbor Press.
31. While keeping pressure on the Facings, Springs, and
Facing Plates, and aligning the Facing Plates to the
spline on the way down, carefully position and press
the assembly on the Hub.
Skip steps 31 & 32 if using LSCB-44.
32. Clean and reapply lubricant to the Shoulder Bolt
O-Rings (Item 23) and install on the Shoulder Bolts.
33. After aligning the Piston (Item 11) to the Air Chamber
(Item 3), insert and reinstall Shoulder Bolts (Item 21)
by torquing them to the specifications shown in Table
?.
34. Insert the Retaining Ring (Item 14) onto the Hub (Item
1).
35. Verify the unit is functional by applying air to the unit
and watching it engage and disengage.
MAINTENANCE (continued)
CAUTION
Working with spring loaded or tension
loaded fasteners and devices can cause
injury. Wear safety glasses and take the
appropriate safety precautions.