End-Cap Replacement - Teledyne WORKHORSE Operation Manual

WorkHorse H-ADCP Operation Manual
5. Examine the transducer assembly nuts, bolts, and washers (8-mm) for corrosion; replace if
necessary. The Parts Location Drawings
hardware. All hardware items are needed to seal the H-ADCP properly.
6. Install all four sets of hardware until "finger tight."
7. Tighten the bolts in small increments in a "cross" pattern until the split washer flattens out, and
then tighten each bolt ¼ turn more to compress the face seal O-ring evenly. Tighten the bolts to
the recommended torque value of 9.6 Newton-meters (85 pound-inches). Do not deform the plas-
tic bushings.
Apply equal pressure to the O-ring as you tighten the bolts. If one bolt is tightened more than
the others, the O-ring can become pinched or torn. A damaged O-ring will cause the system to
flood.
Do not over tighten the bolts that hold the transducer, housing, and end cap together. If you
tighten too far, you can crack or break the plastic housing. On the other hand, leaving the bolts
too loose can cause the system to flood. Tighten the hardware to the recommended torque
value.
The recommended torque value for the transducer head 8-mm bolts is 9.6 Newton-meters (85
pound-inches).

End-Cap Replacement

To replace the end-cap:
1. Stand the H-ADCP on its transducer face on a soft pad.
2. Inspect, clean, and lubricate the O-ring on the housing (see
Apply a very thin coat of silicone lube on the O-ring.
TRDI recommends you use new O-rings if you are preparing for a deployment.
Apply a very thin coat of silicone lube on the O-ring. Using too much silicone lube on the O-ring
can be more harmful than using no O-ring lube at all.
3. Connect the internal I/O connector to the plug on the common mode choke.
4. Place the end-cap on the housing, aligning the mating holes and the beam 3 number embossed on
the end-cap with the beam 3 number embossed on the transducer head. When mating the end-cap
with the housing flange, try to apply equal pressure to all parts of the O-rings. Make sure the face
O-ring remains in its retaining groove.
Check that no wires or any other object is pinched between the end-cap and the housing. Use
rubber bands to hold the wiring in place as necessary. If the O-ring is not in the groove or if a
wire or other object is pinched, the H-ADCP will flood.
5. Examine the end-cap assembly nuts, bolts, and washers (6-mm) for corrosion; replace if neces-
sary. The Parts Location Drawings
All the hardware items are needed to seal the H-ADCP properly.
6. Install all four sets of hardware until "finger-tight."
shows the assembly order of the transducer mounting
shows the assembly order of the end-cap mounting hardware.
EAR-Controlled Technology Subject to Restrictions Contained on the Cover Page.
O-ring Inspection and Replacement).
May 2015
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