Disassembly And Assembly Procedures; Housing Assembly Removal - Teledyne WORKHORSE Operation Manual

WorkHorse H-ADCP Operation Manual

Disassembly and Assembly Procedures

This section explains how to remove and replace the end-cap or transducer head to gain access to the H-
ADCP's electronics, and internal recorder. Read all instructions before doing the required actions.

Housing Assembly Removal

CAUTION
Contents May be
Under Pressure.
Refer to Operator's
Manual Prior to
Servicing.
Caution label on End-Cap
90Z-6038-00
Wear safety glasses and keep head and body clear of the end-cap while opening.
Any system that was deployed may have pressure inside the housing.
H-ADCP systems use either a one-piece housing or a housing and end-cap assembly. When you
need access to the electronics, TRDI recommends removing the housing assembly.
1. Remove all power to the H-ADCP.
2. Remove the I/O cable and place the dummy plug on the I/O cable connector (see
Dummy Plug).
3. Stand the H-ADCP on its transducer faces on a soft pad.
Wear safety glasses and keep head and body clear of the transducer while opening.
Any system that was deployed may have pressure inside the housing.
4. Inspect the transducer bolts for any signs of damage such as bending, stretched bolts, crushed or
deformed bushings, etc. These signs may indicate that there is internal pressure inside the system.
5. To avoid any possible injury it is ALWAYS recommended that you loosen but do not remove the
four transducer bolts to allow any internal pressure to be vented from the system. Loosen the
transducer bolts two turns each in a cross-pattern. Repeat until the face seal O-ring
is not compressed and the system has the opportunity to vent. If you note that the
transducer moves as you loosen the bolts then this may indicate that internal pressure is present.
Be sure to only loosen the bolts far enough to allow the system to vent.
6. Once all four bolts have been loosened and you are sure that there is no internal pressure, remove
the bolts from the transducer.
7. Carefully lift the housing assembly straight up and away from the transducer until you can gain
access to the connector jack on the common mode choke. Use care; the plastic mating surfaces
scratch easily. Do not damage the mating surfaces.
The cable attached to the end cap is only long enough to disconnect the internal I/O cable.
There is NOT enough cable to set the transducer down next to the Housing Assembly.
8. Squeeze the sides of the internal I/O cable connector to release it from the common mode choke
jack. Set the end-cap assembly aside. Set the transducer assembly (transducer face down) on a
soft pad.
9. Clean the O-ring mating surfaces with a soft, lint-free cloth. Inspect the surfaces for damage (see
O-ring Inspection and
10. When you are ready to re-assemble the H-ADCP, see
Replacement).
EAR-Controlled Technology Subject to Restrictions Contained on the Cover Page.
H-ADCP Re-assembly.
May 2015
I/O Cable and
Page 49