Pentair Hydromatic SPD50H Manuel D'utilisation page 8

MAINTENANCE & REPAIR
Mixing old and new seal parts will cause immediate
seal failure. When replacing seal, replace both the rotating and
the stationary seal halves.
1. Reassemble the lower seal as described.
2. Add a drop of Locktite 222 to the shaft and screw the
impeller on hand-tight. The impeller (#11) will force the
rotating seal half into position.
3. Set the seal housing (#20) and motor housing (#2) assembly
into the volute case (#7) and secure with four hex head
screws (#4).
4. To replace the power cord (#22) on single phase pumps,
as determined on page 5, first slip the stator lead wires
through the holes in the wire seal assembly. Coat the cord
grip threads with pipe dope or apply PTFE pipe thread
sealant tape and screw the new power cord assembly into
the motor housing. Referring to wiring diagrams in this
manual, secure wires together. Do not tape leads together
as the hot oil will deteriorate the tape and cause motor
failure.
8
5. Before filling the motor housing with oil, an air test should
be performed. Apply 7 to 8 pounds of air pressure in the 1⁄4"
NPT tap on the top of the motor cover and seal chamber.
NOTE Too much pressure will damage the seal.
Then submerge the pump in water and check for leaks. If a
leak occurs, isolate where it is coming from and correct the
problem by replacing the sealing part. If there are no leaks,
fill the motor and seal housing with high grade transformer
oil, such as Sohio Factopure SE40 or equivalent, to at least
one inch below top of housing. Do not fill the motor housing
completely — allow air space for expansion. Replace oil
plugs (#6). Turn pump on side and fill seal chamber to 1" from
top. Replace plug (#8) and stand pump up.
6. Connect power cord wires to terminals in panel, or connect
power source, and check pump running. Motor should run
smoothly and be free of vibration.
W-03-193 (10-15-22)