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2.
Check the input shaft for surface nicks, burrs or a groove from the sealing lip. Look for a spiral
machine mark that can damage the seal lip.
•
An input shaft with a groove from the sealing lip can be repaired with a Speedi-Sleeve‚ or
similar product. Consult the manufacturer for installation instructions.
•
Alternatively, the input shaft could be replaced instead of repaired.
3.
Check the end of the input shaft and remove any burrs or sharp edges. The end of the shaft
should be chamfered.
4.
Check splines and keyways for burrs or sharp edges.
5.
Wrap the input shaft with plastic shim stock as a temporary sleeve to guide and protect the
sealing lip.
6.
Check the sealing lip direction. Make sure the new seal faces the same direction as the original.
CAMCO's standard practice is to mount the seal so the lip faces the lubricant or fluid to be
sealed.
7.
Pre-lubricate the sealing element by wiping the surface with the lubricant being retained. Apply a
thin layer of "General Electric Silicone Rubber RTV-6" or equivalent to the cartridge bore as a
sealant. When the seal in pressed into place a bead of sealant will form at the back edge of the
steel case and prevent any leakage around the outside edge of the seal.
8.
Whenever possible use an installation tool that has been specifically manufactured for installing
the seal.
•
Installation tools should have an outside diameter .25 mm smaller than the bore size. The
bore should be .13 mm larger than the shaft size, and the face of the tool should be
relieved so that pressure is applied only near the outside diameter of the seal.
•
During installation press the seal flush to the cartridge face to avoid cocking the seal in the
bore. This also positions the seal correctly on the shaft.
9.
When an installation tool cannot be manufactured, install the seal by tapping uniformly around
the seal with a soft hammer. Avoid cocking the seal and make sure the face of the seal is square
to the bore.
8.8 Cam Follower Replacement
Cam follower cartridge removal
cartridge removal. A drawing of this tool is available in the reference section of this manual. The
tool works in a manner similar to a gear puller. The cam follower is retained in the cartridge with an
interference fit. A retaining screw is added as an extra means to retain the cam follower. The
screw head is located inside a counterbore which is tapped for a larger screw. This large screw
will be inserted in the counterbore and pulling on it will remove the cartridge. The cam follower is
also interferenced fitted into the cartridge. The same larger (and longer) screw that pulled the
cartridge out is used to push the cam follower out.
Localized heat can distort the part. Do not over heat any item.
1.
Rotate the index drive until the cam follower cartridge that will be replaced is aligned with the
If the machine builder has provided access to the center of the MDE
then the tooling does not have to be removed. Otherwise the support
structure and fixtures can be removed as necessary, or the support
structure and fixtures can be lifted one to two meters above the unit
and supported by appropriate scaffolding. CAMCO recommends
using professional machinery riggers. The assistance of a CAMCO
trained serviceman is recommended. At least three (3) hours before
installing new cam followers, pack all new cam followers in a large
insulated container (150 liter ice chest) filled with 100 liters of dry ice.
CAMCO has designed a manual extraction tool to facilitate the cam
48
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