Multiquip submersible pumps px400 - Manual (Page 22)

page 22 — cx400/px400 Sub. pump • operation and partS manual — rev. #1 (12/03/10)
Inspecting Lubrication Oil (Mechanical Seal)
1. Block the oil fill opening with a finger and roll pump to
one side to drain (Figure 18) oil into a small transparent
container.
2. If oil is cloudy (milky) or has water in it, indicates
that mechanical seal is defective or worn. Replace
mechanical seal.
impeller/mechanical Seal replacement (px400)
Reference the following procedure and Figure 20 for the
removal of the impeller and mechanical seal.
1. Remove the 4 bolts, nuts and washers that secure,
casing cover to the casing..
Figure 20. Mechanical Seal Impeller
Removal (PX400)
2. Remove any debris that may have accumulated on
the impeller.
3. If replacement of the impeller is required, remove
impeller screw and washer.
4. Slide mechanical seal from casing cover cavity and
replace with new one.
5. Replace o-ring, impeller washer and conical lock
washer if necessary.
6. Reassemble in reverse order.
REMOVE BOLTS
4 PLACES
MECHANICAL
SEAL
IMPELLER
IMPELLER
SCREW
REMOVE NUTS
4 PLACES
CASING
O-RING IMPELLER
WASHER
CONICAL LOCK
WASHER
CASING
COVER
Maintenance
impeller/mechanical Seal replacement (cx400)
Reference the following procedure and Figure 21 for the
removal of the impeller and mechanical seal.
1. Remove the bolts securing the casing cover to the
casing .
Figure 21. Mechanical Seal Impeller
Removal (CX400)
2. Remove any debris that may have accumulated on
the impeller.
3. If replacement of the impeller is required, remove
impeller nut and washer.
4. Slide mechanical seal from casing cover cavity and
replace with new one.
5. Replace o-ring, impeller washer and washers, gaskets,
oil seal and any other pump components if necessary.
6. Reassemble in reverse order.