15-600 Page 21
between inner race and rollers. See 28 thru 30 for
recommended running clearances.
Inner races are equipped with an end ring. They must
be mounted on the correct end of each inner race.
Refer to sectional view showing eccentric and bearings
for proper location of inner race end ring. Radius on
inside diameter of end ring must face out.
ASSEMBLY OF ECCENTRIC AND GEAR
ASSEMBLY IN FRAME
- The following procedures
should be carefully followed in assembling eccentric
and gear assembly in frame.
1.
Install a pipe through eccentric and gear assembly
and place bearing carrier and bearing assemblies
on either end. With lifting devices shown in
FIGURE 18, page 22, lift the unit and turn the
eccentric so center throw is at the extreme top
position (see reference mark in photograph).
Carefully guide into position as shown. Be sure
teeth of eccentric gear are pointing in proper
direction to mesh with teeth of jackshaft.
2.
Bar eccentric and gear assembly so reference
point on center throw moves away from operator
approximately 20º from vertical as shown in
FIGURE 19, page 22. Ease the assembly back
and down slightly, being careful not to damage
teeth of gear or lip of frame.
3.
As eccentric moves into position, the connecting
rods must be lifted and guided into position as
they come in contact with the eccentric. See
FIGURE 20, page 22.
4.
Bar eccentric so reference point moves back
toward operator to approximately 20º his side of
vertical as shown in FIGURE 21, page 22.
5.
Ease eccentric back and lower into position as
connecting rods come to rest on eccentric. Care
must be taken as teeth of main gear come in
contact with teeth of jackshaft. Refer to FIGURE
22 and FIGURE 23, page 23.
6.
With eccentric in position as shown in FIGURE
24, page 23, a porta-power jack can now be used
to spread the frame for installation of the bearing
carrier and bearing assemblies as described
under “Main Bearings”.
MAIN BEARINGS
- These bearings are of the double-
row spherical type. Inner race has a tapered bore.
Main bearings can be replaced without removing
eccentric assembly from the pump and without
disturbing connecting rods.
Remove bearings with cartridges from the eccentric
shaft and frame as outlined in procedure covering
removal of eccentric and gear assembly. Be sure to
support eccentric securely in its original location.
Remove lube oil pump gear to protect oil pump shaft
as main gear might move during this operation.
Main bearing is a slip fit in the bearing cartridge or
carrier, and can be readily removed. Remove inner
retainer ring from end of cartridge if it is necessary to
drive the bearing from the cartridge.
Antifriction bearings should not be removed from their
protective wrapping until ready to be mounted.
Do not
remove protective grease from rollers of new
bearings. It will not contaminate crankcase oil.
Procedure For Mounting
1.
When ready to mount, unwrap bearing and stand
it upright on a clean flat surface with bore
horizontal.
2.
Determine and record internal clearance by
checking with feeler gauge between upper rollers
and inside diameter of outer race. Check both
rows of rollers.
3.
Wipe outside diameter of bearing clean and apply
a thin coat of crankcase oil.
4.
Wipe bore of bearing cartridge clean.
5.
Push bearing snugly onto taper of shaft by hand
only, without cartridge.
6.
Check and record bearing overhang with a depth
micrometer or with straight edge and feeler
blades. This can be done with eccentric out of the
frame as shown in FIGURE 25, page 23.
7.
Determine thickness of shim pack required for
drive-up by subtracting .067” (1.7018 mm) for
PZG and PZH, .075” (1.905 mm) for PZJ, or .090”
(2.286 mm) for PZK, PZL and PXL from the
bearing overhang. For example (Model PZJ): If
the overhang is .100” (2.54 mm), the shim pack
thickness is .100” (2.54 mm) minus .075” (1.905
mm) equals .025” (.635 mm).
8.
Lay bearing on a flat clean surface with small end
of bore down.
9.
Lower cartridge over bearing, using light blows
with a soft mallet if needed. Bearing cartridge is
interchangeable end for end.
10. Bolt retainer ring directly against upper end of
R.H. bearing cartridge. This will be at large end of
bearing bore. Wire cap screws.
11. Bolt retainer to upper end of L.H. cartridge with
1/8” (3.175 mm) spacer between. Wire cap
screws. Current models do not use retainer and
spacer on L.H. cartridge. R.H. bearing is secured
endwise. The L.H. bearing floats endwise within
the cartridge to allow for uneven expansion and
contraction of eccentric shaft and frame. Bearings
are not preloaded.
12. Apply a thin and uniform coating of micronized
graphite or light oil to bore of bearing and to
tapered portion of eccentric shaft.
