2
Routine Rinsing after Recovery (applies to all pumps)
At the end of a day of taking casts:
1. Remove the Tygon tubing from the pump head’s hose barbs.
2. Leaving the pump head on the housing, thoroughly rinse the inside of the pump head, pouring clean, fresh water
through a hose barb. If the pump head is not rinsed between uses, salt crystals may form on the impeller. Over
time, this may freeze the impeller in place, preventing the pump from working.
3. Replace the Tygon tubing on the hose barbs.
4. Unscrew the cable locking sleeve from the bulkhead connector, and slide it up the
cable. Thoroughly rinse the cable connection (still mated) with clean, fresh water.
This will prevent premature cable failure.
5. Slide the locking sleeve back into place, and screw it back onto the bulkhead
connector. Do not use a wrench or pliers to tighten the locking sleeve.
SBE 5T
Periodic Cleaning for SBE 5T
If you are going to store the pump for more than 1 week, or have removed the pump from a mooring, perform a more
thorough cleaning:
1. Unscrew the pump head from the housing.
2. Using clean, fresh water, thoroughly rinse the pump head and impeller.
3. Inspect the impeller for salt deposits. Clean any deposits with clean, fresh water and a toothbrush. Verify that the
impeller can turn freely.
4. Inspect the shaft, and the o-ring and thrust washer holding the impeller on the shaft. There is another thrust washer
underneath the impeller magnet, inside the housing. If this thrust washer is in good condition, you should observe a
small gap between the bottom of the impeller and the end cap. If there is no gap, the thrust washer is worn and
needs to be replaced (see Yearly Maintenance for SBE 5T for replacement procedure).
Locking sleeve
SBE 5T with Pump Head Removed
Impeller –
note salt
deposit
End cap
Shaft, o-ring,
and thrust
washer
Impeller
End cap
Shaft
Note small gap
between impeller
and end cap.
Absence of gap
indicates worn
thrust washer
under impeller
magnet.
End cap
o-ring
208
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