Nexen MWCB 830812 - Manual (Page 13)

13
FORM NO. L-20016-X-1209
NOTE
The following sections are arranged by model. Verify that you are in the correct section for your model.
FWCB
PARTS REPLACEMENT—PILOT, COUPLING, AND SHEAVE MOUNT
Refer to Figures 13 - 16.
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 13) out of the Sheave (Item
12) or old 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 13 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 13 or 34), press the new Ball Bearing (Item 13 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.
7. Remove the old Flat Head Machine Screws (Item 24) securing
the Friction Facing (Item 4) to the Sheave (Item 12) or Pilot
Drive Disc (Item 33).
8. Remove the old Friction Facing (Item 4).
9. Install the new Friction Facing (Item 4) and tighten the new
Flat Head Machine Screws (Item 24) to 26 In. Lbs. [2.9 Nm]
torque.
FIGURE 13
SHEAVE MOUNT
41
34
12
4
24
FIGURE 14
PILOT MOUNT
41
13
33
4
24
CAUTION
Working with spring loaded or tension
loaded fasteners and devices can cause
injury. Wear safety glasses and take the
appropriate safety precautions.