RiverPro and RioPro ADCP Guide
October 2017
EAR-Controlled Technology Subject to Restrictions Contained on the Cover Page.
Page 49
End-Cap Removal Procedures
To remove the end-cap:
There are no user replaceable parts in the transducer except for O-Rings and desiccant.
When access to the electronics is required, the end-cap must be removed first to disconnect
the ribbon cable and power cable and then remove the housing
(see
Transducer Head
Assembly Removal
).The ribbon cable is not long enough to be disconnected when removing
the transducer head assembly.
1. Dry the outside of the RiverPro/RioPro.
2. Stand the RiverPro/RioPro on its transducer face on a soft pad.
3. Remove all power to the RiverPro/RioPro.
4. Remove the I/O cable and place the dummy plug on the I/O cable connector (see
I/O Cable and
Dummy Plug
).
5. Inspect the end cap bolts for any signs of damage such as bending, stretched bolts, crushed or de-
formed bushings, etc. These signs may indicate that there is internal pressure inside the unit.
If the RiverPro/RioPro flooded, there may be gas under pressure inside the housing. As a
precaution, loosen the four end-cap bolts to vent the system.
6. To avoid any possible injury it is ALWAYS recommended to loosen but do not remove the four M5
end-cap bolts and allow any internal pressure to be vented from the system. If the end cap moves
as the bolts are loosened, then this may indicate that internal pressure is present. Be sure to only
loosen the bolts far enough to allow the system to vent.
7. Once all four end-cap bolts have been loosened and there is no internal pressure, remove the bolts
from the end-cap.
Make sure to save all hardware removed during this procedure for re-assembly.
8. Carefully pull the end-cap away from the housing until access is gained to the internal cable con-
nectors. Use care; the plastic mating surfaces scratch easily. Do not damage the mating surfaces.
9. Disconnect the internal power and I/O ribbon cable connector and the external power cable con-
nector from their jacks. Set the end-cap aside.
10. Clean the O-ring mating surfaces with a soft, lint-free cloth. Inspect the surfaces for damage (see
O-ring Inspection and Replacement
). Even small scratches can cause leakage around the O-ring
seal.
Transducer Head Assembly Removal
Always remove the end-cap first.
To remove the transducer head:
1. Remove all power to the RiverPro/RioPro.
2. Remove the I/O cable and place the dummy plug on the I/O cable connector (see
I/O Cable and
Dummy Plug
).
3. Remove the end-cap (see
End-Cap Removal Procedures
).
