Accusonic 8510+ series Reference Manual page 81

18. Continue turning the bearing lever until the transducer is entirely clear of the valve. Unscrew and
remove the transducer from the jacking screw.
19. Inspect the transducer face for growth or buildup. Remove any buildup with a hard nylon scrubber
(Dobie) and a mild detergent (Joy).
Note: Handle the transducer with care. Do not cut or nick the O-rings or try to remove them from
the transducer.
Caution: Once a transducer face has been cleaned, do not contaminate it with grease, oil or hand
or finger prints, as such film will degrade performance of the unit.
20. Screw the transducer back onto the jacking tool.
Note: Transducers are position-specific. Always reinstall a transducer in the same location from
which it was removed.
Note: When replacing one transducer with a new one, double check that the part number of the
new unit exactly matches the number of the old one. Make certain that an inner path transducer is
replaced with an inner unit and that an outer path transducer is replaced with an outer unit.
21. Just prior to assembly, lightly lubricate the O-rings with an appropriate O-ring grease, Parker O-Lube
or equivalent.
Warning: Do not use silicone-based grease
22. Turning the bearing lever, advance the face of the transducer until it just reaches the valve opening.
23. Use a 1/2 inch (13mm) open face wrench on the hex end of the jacking screw to rotate the jacking
screw until the alignment slot on the transducer is in alignment with the locking pin on the conduit.
Note: Hold the wrench in place during the following steps to help keep the transducer in
alignment until it engages the alignment pin located on the inside end of the feedthrough.
24. Continue to turn the bearing lever, advancing the transducer into the valve housing until the middle O-
ring on the transducer just slips inside the valve housing.
25. Slowly open the valve all the way.
26. Continue to ease the transducer into the mount until either it meets increased resistance or until the
shoulder of the jacking screw comes flush with the bearing lever. Do not advance the jacking screw
shoulder past the surface of the bearing lever.
Note: It may be necessary to rock the valve handle back and forth slightly to allow the transducer
to slip through the valve.
Note: If the transducer stops prior to the fully inserted position, it is probably out of alignment.
Rock the jacking screw back and forth slightly using the 1/2 inch (13mm) wrench until the unit
aligns with the alignment pin and is free to advance further.
CAUTION: Use only enough pressure during insertion to overcome the back pressure from fluid
in the pipe. If you try to force the transducer into place when it is misaligned, you will damage the
unit, possibly jamming it in the fitting.
27. When the transducer is home, screw in the locking pin until it bottoms. Then back off the pin one
quarter turn to allow the transducer to center itself in the mount.
28. Refer to Figure 10-1 on page B-12and verify that the following safety conditions are met. If any of
these conditions are not met, there may be a safety hazard. Leave the tool in place. Try removing and
reinserting the transducer, and rechecking the safety conditions. If that doesn't solve the problem,
STOP WORK IMMEDIATELY and contact Accusonic for advice.

Locking Pin is Fully Engaged Check that the clearance between the shoulder of the pin and
the face of the locking ring is less than the specified limit. Check this by trying to slide the u-
shaped end of the clearance gauge under the pin as shown. It must not fit.
Transducer Maintenance
.
B-7