FMC Technologies Smith Meter I-75 - Disassembly of Model T-20, T-40, I-150, SC, SD, SF, and SG Meters

Page 6 • MN01029 Issue/Rev. 0.5 (6/11)
Section 1 – General Information and Description (continued)
Figure 16
Figure 18
3. Remove rotor assembly, Figure 19, and clean rotor
and housing interior.
•Liftstraightuptopreventdamagetotherotorblades.
•Ifmeterhasbeeninserviceoncrudeoiloranyother
viscous liquid, a solvent should be used to dissolve
the residue. Do not use water.
•Atreassembly,caremustalsobetakenthatjack-
shaftgearandrotorgear,Figure17,areproperly
meshedwhencoverissecuredtohousing.This
can be accomplished byslowly turning single
piniongear,ontopofcover,untilrotorandjack-
shaft gears mesh.
•Atreassembly,theslotinthelocatingarmmust
belinedupwiththelocatingarmpininthebot-
tomofthehousing,Figure20.
•Besureadjustingspring,Figure20,isreinstalled
at time of reassembly.
Figure 19
6. Figure 16 shows the rotor shaft inside the rotor body.
•Therotorbody,shaft,androtorcover(removedin
Figure 12) are factory-assembled and matched as
one integral piece. Therefore, if any one of these
items is damaged, the complete assembly (body,
shaft, and cover) must be replaced.
Disassembly of Model T-20, T-40, I-150, SC,
SD, SF, and SG Meters
Removing Rotor Assembly From Housing
1. Remove all accessories and calibrator from top of
meter.
•Ifdifcultyisencounteredinremovingthecalibrator,
the adjusting stem assembly may have to be taken
out of the meter cover. Refer to Page 14 for adjusting
stem removal.
2. Remove meter housing cover, Figure 17.
•Slotsareprovidedaroundtheperimeterofthecover
to assist in prying the cover of the housing.
•Whenreplacingcover,positionadjustingscrewso
that bottom of screw is flush with bottom of shaft
bearing hub, Figure 18. If adjusting screw is allowed
to protrude too far into the cover bearing hub, dam-
age to the cover could result when cover is secured
to the housing.
•Beforereplacingcover,applyathinlayerofseal-
ant (Master Gasket by Loctite is recommended)
aroundtheperimeterofthecovertoformaseal
betweenthehousingandcover.Ifasealantisnot
used,uidmayleakoutofthecover.
Figure 17
 NOTE:MeterswithO-RingsDONOTrequirea
Master Gasket.