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2.2.
Repeat 2 and 2.1 for next dwell position
2.3.
Visually observe the surface of the outer shell. Inspect followers for damage or
3.
Broken cam followers indicate possible damage to the follower wheel. Remove any broken cam
followers. See the section titled "Cam Follower Replacement", in this Service Manual. Inspect the
cam follower hole in the follower wheel for damage, and to determine whether the cam follower
stud hole is "wallowed out", elongated, oval, etc. Using the nominal size of the follower cartridge as
a guide, verify a press fit between the stud and the hole of 0.013 to 0.025 mm for the lower third of
the hole depth.
4.
Wobbling of the output or grinding noises during each index indicate damage to the output bearing
(Item #20). Further inspection requires removal of the follower wheel.
5.
Replace cam followers if loose in dwell or if the outer shell is visibly damaged. See the section titled
"Cam Follower Replacement" in this Service Manual.
6.
Replace the cam if imperfections are noted. This is best done by CAMCO personnel.
7.
Replace the follower wheel if holes are oversized. This is best done by CAMCO personnel.
8.7 Oil Seal Replacement
CAMCO recommends replacing the input oil seals (Item #12) anytime the input is disassembled
regardless of whether they are damaged or not. After being in service for some time, the sealing lip can
become brittle and easily crack. To replace the oil seal on the reducer side of the index drive, remove the
reducer and additional drive equipment as necessary to gain access to the seal. See the reducer and
other manufacturers' Service Manuals for instructions on removing this equipment. On the other side of
the index drive, remove the proximity/sensor switch bracket or other equipment as necessary to gain
access to the oil seal.
Oil seal removal
1. To remove the oil seal
through the case of the seal. Install sheet metal screws into the holes.
2. Use a Slide Hammer or Pliers (Vise Grips‚) to grip the sheet metal screws to pull out the existing seal.
Do not drill holes in the case of the seal. Chips will get into the unit and they
cannot be easily removed. A punched hole provides a better "bite" when
installing sheet metal screws into the metal case
Oil seal installation
1.
Check new seal for damage.
•
Do not use an oil seal with a sealing lip that is turned back, cut or damaged.
•
Also, if the outer face or outside diameter is bent or otherwise damaged, replace the oil
seal.
looseness.
Radial
m m . Do not confuse
Axial end play
of 0.8 to 1.5 mm is acceptable. If
outer shell exceeds 1.5 mm the followers should be replaced.
NOTE: Cam followers are replaced as added insurance against later
failure. When in doubt, replace the cam followers.
(Item
#12), use a sharp punch and punch two (2) diametrically opposed holes
looseness of the outer shell should not exceed 0.025
radial
looseness of the outer shell with
47
radial
axial
end play.
axial
end play of the
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