Nexen MWCB 830812 - Manual (Page 15)

15
FORM NO. L-20016-X-1209
LWCB AND MWCB
Refer to Figures 17 - 20.
1. Remove the Retaining Ring (Item 41) from the Sheave (Item
12) or Pilot Drive Disc (Item 33).
2. Press the old Ball Bearing (Item 15) out of the Sheave (Item
12) or Ball Bearing (Item 34) out of the Pilot Drive Disc (Item
33).
NOTE
Do not reuse the old ball bearings. Applying force on the
inner race of a ball bearing to remove a ball bearing held
by the outer race causes damage to the bearing.
3. Clean the bearing bore of the Sheave (Item 12) or Pilot Drive
Disc (Item 33) with fresh safety solvent, making sure all old
Loctite ® residue is removed.
4. Apply an adequate amount of Loctite ® 680 to evenly coat
the outer race of the new Ball Bearing (Item 15 or 34).
5. Support the Sheave (Item 12) or the Pilot Drive Disc (Item
33) and pressing on the outer race of the new Ball Bearing
(Item 15 or 34), press the new Ball Bearing (Item 15 or 34)
into the Sheave or Pilot Drive Disc.
6. Reinstall the Retaining Ring (Item 41).
NOTE
The Flat Head Machine Screws are assembled with an
anaerobic locking compound. Inserting a properly fitting
screwdriver into the head of the Flat Head Machine Screw
and striking the end of the screwdriver with a hammer will
break the crystalline structure of this locking compound
and allow removal of the Flat Head Machine Screws. Never
use an impact wrench to remove the Flat Head Machine
Screws.
On the LWCB, the Flat Head Machine Screws securing the
Friction Facing (Item 10) are Item 24. On the MWCB, the
Flat Head Machine Screws securing the Friction Facing
(Item 10) are Item 25.
7. Remove the old Flat Head Machine Screws (Item 24 or 25)
securing the Friction Facing (Item 10) to the Sheave (Item
12) or Pilot Drive Disc (Item 33).
8. Remove the old Friction Facing (Item 10).
9. Install the new Friction Facing (Item 10) and tighten the new
Flat Head Machine Screws (Item 24 or 25) to 26 In. Lbs. [2.9
Nm] torque.
10. Fully support the Air Chamber (Item 8) and press the Clutch
Friction Disc (Item 9) out of the Air Chamber.
FIGURE 17
SHEAVE MOUNT
41
15
12
10
24/25
FIGURE 18
PILOT MOUNT
41
34
33
10
24/25
FIGURE 19
9
14
8
CAUTION
Working with spring loaded or tension
loaded fasteners and devices can cause
injury. Wear safety glasses and take the
appropriate safety precautions.
PARTS REPLACEMENT—PILOT, COUPLING, AND SHEAVE MOUNT (continued)