31
Removing Bowl For Machining/Replacing
The FR series centrifugal feeder comes with one of two styles of bowl:
Standard on the FR-20 is a solid, cast urethane bowl; the FR-30
standard bowl is an injection foam urethane bowl. The FR-30 injection
foam urethan bowl should not be modified. If you wish to remove and
machine or replace the bowl because of damage, follow the procedure
below.
Step 1ÑTurn Off Power.
Turn off power. Remove the FR-20 or
FR-30 feeder's bowl.
Step 2ÑReplace Bowl.
If the FR-30 standard bowl has been
damaged, replace it with a new bowl. An optional, solid cast
urethane bowl is available which can be machined if desired.
Mounting hardware is provided with the replacement bowl. Note
that unlike the FR-30, all versions of the FR-20 are supplied with a
solid case urethane bowl that can be machined if needed.
Do not machine the FR-30 standard injection foam urethane bowl,
as modifications will remove the hard outer layer and expose the
foam inner core, making the bowl unusable.
Step 3ÑMachine Bowl (if necessary).
Machine the bowl as
necessary.
Step 4ÑSet Bowl Runout.
Replace the bowl. After putting the
bowl in place, first set the bowl elevation to the correct height
±
0.03” (0.8 mm). Next, set bowl runout, and check backup ring
clearance. Check that all safety covers are in place before returning
the feeder into service.
If Parts Jam: General Tips
Step 1ÑInspect The Feeder.
If parts jam repeatedly, review the
following:
▲
Is the prefeeder delivering too much product? (The prefeeder
should deliver only enough product to the feeder to keep the line
running at the required rate.)
* Machining is okay here if
bowl runout is returned to
original tolerances (contact
Hoppmann Corporation)
Foamed Polyurethane
Bowl (black)
* Rim
Outer
Edge
Cast Stainless
Steel Bowl
Figure 5-6. Machinable
Bowl Surfaces
* Bowl Rim
Inner Wall
(no
machining
allowed)
* Rim
Outer
Edge
* Bowl Rim
Inner Wall
(no
machining
allowed)
Cast Polyurethane
Bowl (FDA white or
optional black)
No machining is
allowed anywhere on
the bowl because the fragile
foam polyurethane
inner core will
be exposed,
leading to rapid
wear and early
failure of the
bowl.
foam
core
Chapter 5 Repair & Troubleshooting
