3. Use an arbor to press the bearing cups into the
cartridges. Coat the outside of the cup and the
bore of the cartridge with an anti-seize lubricant
proir to pressing.
4. INSTALLATION OUTPUT SHAFT
A. Place the output shaft/follower wheel
assembly into the housing.
B. Install the output cartridge into the housing
and fasten with capscrews. Use the same
shims as on disassembly unless endplay
exists after completing steps C & D.
C. Tap the large output bearing cup into the
housing. First loosen the output cartridge
and press the cup flush with the backside of
the snap ring groove. Coat the outside of the
cup and the housing bore with anti-seize
lubricant prior to pressing.
Fig.8 Installing output bearing cup
D. Install the snap ring and tighten the output
cartridge capscrews. Check the shaft for
endplay. There should be a small amount of
drag from preloading the bearing.
If endplay exists remove shimstock from
cartridge. In rare instances it may be
required to remachine the cartridges if all
shims have been removed and endplay still
exists.
5. INSTALLING INPUT SHAFT
NOTE: The output shaft must be installed prior to
processing.
A. Place the input shaft/cam assembly into the
housing.
B. Install the input shaft cartridges, aligning the
match marks made during disassembly. Use
the same shims as on disassembly. Loosely
install the cartridge mounting capscrews.
6. SETTING CAM PRELOAD
NOTE: When setting cam preload, follow steps “A”
through “F”.
A. Adjust the input (eccentric) cartridges until
the followers are parallel to the cam track
and preload the cam slightly. Use the dwell
area for this procedure (tighten cartridge
capscrews).
Fig.9 Cams preloaded against followers.
CAUTION: Improper preload results in
excessive loading of the indexer. Backlash (lack
of preload) is also not permissible, especially in
dwell.
B. Apply “Prussian blue” to the entire track.
Adjust the two cam plates until the Prussian
blue shows a uniform pattern. Individual
adjustment of the 250P and 387P does not
apply since they are one piece cams.
C. Rotate the input to each dwell position and
verify that there is no looseness in dwell, If
there is looseness adjust the eccentric
cartridges to preload the mechanism in the
loosest dwell.
6
6
P Series
Service Manual
