Dover 750RNG, Service Manual

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16
Follower Wheel/Output Bearing Replacement
Follower Wheel/Output Bearing
Removal
1. Use the motor drive package to position
the input shaft keyway such that the cam
is just entering dwell.
2. Remove socket head screws (Item #34)
and dial ring (Item #2).
3. Remove socket head cap screws (item
#35) from outer race of bearing (Item
#14). DE-STA-CO used Red Perma-
Lok® when tightening these screws and it
may require heating the screw for ease of
removal.
CAUTION
Do not overheat. Overheating can distort
mating parts.
4. Remove pull dowels (Item #37) by either
pulling or knocking downward through
base (preferred).
5. Thread lifting eyes into the tapped holes in
the output face of the follower
wheel/output bearing (Item #14). (Two
places 180 degrees apart or three places
120 degrees apart).
6. Using a boom crane or hoist, lift up the
follower wheel/input bearing.
Follower Wheel/Output Bearing
Installation
Prior to installing the follower wheel proceed
as follows. If followers have been removed,
replace all cam followers in the follower
wheel. See the section titled "Cam Follower
Installation" in this Service Manual. Install
cam and input shaft if they were removed.
See the section titled "Cam and Input Shaft
Installation" in this Service Manual. Clean and
deburr all parts before re-assembly. Follow
tightening torque and Perma-Lok® ‚
recommendations as outlined in this Service
Manual and the "General Service Manual".
1. Install follower wheel using the following
steps.
1.1. Use a boom crane or hoist to lower
the follower wheel onto the base.
Align dowel holes in follower
wheel/output bearing (Item #14) with
dowel holes in base plate (Item #8).
1.2. With the cam in place, be sure to
position the followers on either side of
the cam rib. The cam must be just
entering dwell and at the start of
motion.
1.3. Install pull dowels (Item #37). Apply
Red Perma-Lok.
1.4. Install socket head cap screws (Item
#35). Tighten to specification. See
table titled “Torque Requirements For
Tightening Screws” in thi s Service
Manual.
2. Install the dial ring (Item #2).
2.1. Align the dowel holes in the dial ring
with the dowel pins (Item #38) in the
follower wheel (Item #14)
2.2. Re-oil the felt or rubber seal (Item
#29)
2.3. Lower the dial ring until it touches the
felt seal.
2.4. Continue to lower the dial ring in
small increments, pausing to tuck the
felt seal into the groove in the bottom
of the dial ring. Once the felt seal is
seated in the dial ring, lower the dial
ring completely.
NOTE FOR 1100RNG & 1550RNG
ONLY: If the felt or rubber seal (Item #29)
needs to be replaced, refer to the
assembly diagram on page 24 of this
manual. The felt seal can only be replaced
with the bearing off of the base plate (Item
#8)
2.5. Reinstall socket head cap screws
(Item #34) into dial ring.
14
RNG Series
Service Manual