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IOM BiRotor 3” to 6” R03
Cleaning Measuring Unit
14.
15. Scored metal should be removed with a scraper
or fi le. Remove only the high points and do not
remove any more metal than necessary.
16. Polish rotors with crocos cloth and wash carefully
in solvent or kerosene to remove all particles of
grit or metal.
17. File lightly the end cover (items 4 and 15) to re-
move any burrs or high spots. Use fi ne sandpaper
to remove corrosion and burrs from the surface of
the bores that carry the bearings.
18. Ball bearings should be cleaned and inspected for
wear.
19. All gears and shafts in rear gear cover assembly
(item 2) should be inspected. Check all O-rings
and gaskets for wear and replace where neces-
sary.
NOTE:
Wash all parts thoroughly in solvent, light fuel
oil or kerosene. Dry thoroughly with compressed air
and/or with lint free wipers.
Assembly - Models B061A-B095A
1. Lubricate all bearings and o-rings with a light
weight oil.
2. Position measuring unit body (item 3) in wood-
en cradle and attach front end plate (item 4) by
installing screws (items 5 and 12).
Removing Timing Gear and Rotors
9. (Measuring Unit Part Numbers 172205 and 182105)
Remove screw (item 43) and locknut retainer
(item 42).
10. Place a small piece of rubber between the tim-
ing gears (items 17 and 32) and remove locknuts
(items 19 and 41) and lockwasher (item 40). Bend
tab on lockwasher to remove locknuts.
11. Timing gears are taper fi tted to the shafts and can
be removed one at a time by striking the face of
the gear inside the teeth with a plastic hammer.
Be careful not to damage the rotor shaft threads
when removing the timing gears.
13. Remove rotor spacers (item 16), ball bearings
(item 6’ seal retainers (item 62) and crane
seals
(item
53).
NOTE:
Ball bearings (item 6) can be removed from
end covers by gently tapping or pressing on the inner
race of the ball bearings from inside the end covers.
Use care not to damage crane seals (item 57) when
removing ball bearings.
14. Separate rotors (items 13 and 33) from the front
end cover (item 5) and remove front end cover
from meter housing.