Specifications
3
Yearly Maintenance for SBE 5T
1. Unscrew the pump head from
the housing.
2. Replace the o-ring and 2 thrust
washers on the shaft:
A. Remove the o-ring from the
shaft. A pair of tweezers works
well for this.
B. Pull the impeller and attached
magnet off the shaft. The thrust
washer above the impeller will
come off at the same time.
Inspect the impeller for salt
build-up, and clean if
necessary. Inspect the magnet for wear. Particularly in sandy coastal environments, the magnet may be worn
down from abrasion. If necessary, replace the impeller / magnet assembly (PN 30009).
C. Remove the second thrust washer from the bottom of the shaft. A pair of tweezers works well for this.
D. Inspect the shaft for wear.
E. Rinse the shaft and depression in the housing with clean, fresh water. Allow to dry.
F. Using new thrust washers (2 of PN 30010) and o-ring (PN 30095), replace the thrust washer and impeller /
magnet on the shaft. Replace the other thrust washer and o-ring on the shaft, above the impeller, pushing hard
with your fingertip to seat the thrust washer and o-ring in place.
3. Inspect the end cap o-ring and the mating surface on the pump head for dirt, nicks, and cuts. Clean or replace as
necessary. Apply a light coat of o-ring lubricant (Parker Super O Lube) to the o-ring and mating surfaces.
4. Reinstall the pump head on the pump housing.
5. Inspect the bulkhead connector for corrosion, which is a sign of seawater leakage between the bulkhead connector
and cable. If there is corrosion, thoroughly clean the connector with water, followed by alcohol. Inspect the
bulkhead connector for chips, cracks, or other flaws that may compromise the seal. Inspect the mating cables
connector for cuts, nicks, breaks, or other problems that may compromise the seal. Give the connector surfaces a
light coating of silicon grease, and remate the connector properly; see Application Note 57: I/O Connector Care
and Installation.
If the bulkhead connector is severely corroded or damaged, it must be replaced. Sea-Bird recommends that
this work be performed at the factory, because the pumps physical configuration makes customer-
replacement of the connector difficult.
PN
30095
o-ring
PN
30010
thrust
washer
PN 30009
impeller/
magnet
Shaft
End cap
SBE 5T with Pump Head and Impeller Removed
PN 30571
o-ring
PN
30010
thrust
washer