REPLACING WORN OR DAMAGED DISCS
These instructions are for replacing worn or damaged discs of the drum section.
Preparations:
1. Remove drum section from frame.
2. Determine the shortest point to worn/damaged disc.
3. Remove pillow block bearings from the axle on the end you are working with by loosening the set
screw.
NOTE: It might be difficult to remove the bearings because of the beveled edge created by the set screws.
Removing discs:
1. Remove nylon lock nuts and washers from tie rods.
NOTE: WITTEK uses nylon lock nuts on all nuts and bolts combinations. It is recommended that when
replacing the lock nut, a new nylon lock nut is used. Nylon lock nuts can be purchased at any
hardware store (standard size of 3/8” is used).
2. Remove end plate by loosening and removing the nut and bolt.
3. Remove the wheel only, tire, wheel only and the spacer.
4. Begin to remove discs until you reach the worn/damaged disc.
5. Replace old disc with new disc.
Reassembling discs:
1. Replace disc(s) that were removed.
2. Replace the spacer, wheel only, tire and wheel only.
NOTE: Before replacing the end plate and pillow block bearings, lightly sand the shaft to smooth out beveled
edges or other nicks created by the set screw (this will make it easier to replace the end plate and
pillow block bearings).
3. Replace end plate.
4. Replace washers and nuts on tie rods.
5. Finger tighten all nuts evenly.
6. Place drum section on a flat surface (i.e. worktable).
7. Using a golf ball as a guide tool, insert the golf ball in the space between each disc to determine that the
golf ball fits "snugly" and that the golf ball does not slide down. If sliding occurs, retighten the nuts on
the tie rods until you have reached the desired snugness in each disc section.
DO NOT OVER TIGHTEN NUTS!!
8. Replace nut and bolt on end plate.
