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IOM BiRotor 3” to 6” R03
NOTE:
Slot on outer race of ball bearing must align
with roll pin (Item 14 and/or 9) in the end plate
(Figure 4-16). A special adaptor can be made to
fi t over the bearings (indicated by arrow on Figure
4-15) to hold in place.
7. Rotate the housing body (Item 2). Slide on each
end of the rotors (Items 1 & 21) the polished steel
ring (Figure 11-5/4-7) that goes to the crane seal
(Item 44).
8. Insert the rotors (Items 1 & 21) into proper slots so
that the threaded, tapered rotor shafts protrude
from the open end of the measuring unit body
(Figure 11-6/4-9).
9. Align the port openings of the end plate (Item
with those of the measuring unit body (Item 2)
using care to align the two locating dowel screws
(Item 4) with their corresponding holes. Secure
the end plate (Item 3) to the measuring unit body
by the two dowel screws (Item 4) and install the
socket head screws (Item 22) alternating from one
side to another when tightening (Figures 11-12/4-10
and 11-7/4-11).
10. Rotate measuring unit and replace crane seal
(Item 44) with rubber face downward (Figure 11-
10/4-4).
11. Position bearing thrust washer (Item 13) over the
crane seal (Figure 11-3/4-5).
NOTE:
The inner holes on the thrust washer (Item
13) fi ts over the dowels on the crane seal and the
outer hole fi ts into the roll pin as illustrated in
Figure 11-11/4-16.
12. Install ball bearing (Item 12) within bearing bore of
the end plate (Figure 4-6). Press into place using a
sleeve or deep socket until ball bearings (item 12)
are bottomed.
NOTE:
Slot on outer race of ball bearing must align
with roll pin in the end plate (Figure 4-16).
13. Replace mounting plate (Item 23), secure with
screws (Item 26) and washers (Item 38, Figure
4-12). NOTE: The wide end of the mounting plate
(Item 23) mounts over the four tooth (4T) Rotor
(Item 21).
14. Replace rotor spacer (Item 27, Figure 4-13).
NOTE:
Make certain the short roll pin on the rotor
spacer mates properly into the slot on the inner
race of the ball bearing.
15. Place the small timing gear (Item 20) on the
threaded shaft of the three-tooth (3T) rotor (Item
1) and the large timing gear (Item 28) on the
threaded shaft of the 4T rotor (Item 21). The rotor
shafts and timing gear bores are tapered allowing
only one manner of assembly.
NOTE:
Back out the set screws (Item 15) so that
the timing gears will be fl ushed when installed. The
long roll pin on the rotor spacer mates with the
hole in the timing gear.
16. Install lockwasher (Item 31) over rotor shafts en-
gaging bent tab of Iockwasher with hole in the fl at
side of timing gears. Secure lockwasher by install-
ing jam nuts (Item 30, Figure 4-14).
17. The measuring unit can now be laid on its side for
better access or further reassembly.
18. Replace bearing retainer (Item 18) on the 4T and
3T rotors. All measuring units will require two
bearing retainers except the measuring unit as-
sembly number 213505-030 which has one bear-
ing retainer (Item 18) and one drive adaptor (Item
11) on the 3T rotor.
NOTE:
The dowel on the bearing retainer or drive
adaptor will mate with the slot on the inner race of
the ball bearings.
19. To secure the bearing dowels, each measuring
unit is listed below:
