Disassembly
Page 8 June 2016TRB-UM-01789-EN-02
DISASSEMBLY
1. Firmly hold the ow meter and, using
tweezers, carefully remove internal snap
ring from the upstream end.
2. Use long nose pliers to grasp one vane of
the ow straightener and gently pull the
ow straightener and rotor assembly from
the body. Use a slight twisting motion.
3. Press down on the hub to relieve spring
pressure on the C-washer and remove with
tweezers or thin-nosed pliers.
4. Remove hub, spring and spacer.
5. Carefully remove the rotor from the shaft.
6. Remove the snap ring from the side of
the bearing and push the bearing out of
the rotor. Figure 2: B1500 turbine flow meter
CLEANING
Immerse all parts, except the pickup, in a clean, filtered solvent suitable for removing
residue from the liquid used with the flow meter. If necessary, use a soft bristle brush.
If there is foreign matter in the ball bearings, soak the bearings in the solvent for
approximately 10 minutes and then dry with filtered compressed air. Do not use excessive
air pressure.
OTE:NDo not sonic clean the bearings.
EXERCISE EXTREME CARE DURING THE CLEANING PROCESS SO NONE OF THE
PARTS ARE DROPPED, SCRATCHED OR DAMAGED IN ANY WAY. DO NOT ATTEMPT TO
FURTHER POLISH ANY OF THE PARTS, ESPECIALLY THE ROTOR.
Cleaning a Turbine Meter after Water Calibration and/or Service
OTE:NWhen cleaning flow meters, keep the body, sleeve and pickup together. The
sleeve is fitted to the body and the pickup has a protruding pin. Replacement
pickups are supplied with a nut and have no protruding pin.
1. Remove the meter from the line and let all excess water drip out.
2. Fill the meter with alcohol, at least 50% Isopropyl, Ethyl or Methyl, and let it stand for
5 minutes.
3. Discard the alcohol and let the meter dry for 2 minutes.
4. Fill the meter with MIL-C-7024 Type 2 calibration uid, or similar solvent, and let it stand
for 1 minute.
5. Discard the calibration uid and ush the meter with an approved uorocarbon solvent,
such as Isotron.
