Xylem MPV - Manual (Page 90)

Installation, Operating and Maintenance Instruction
Model MPB, MPV
MPB 100-english page 86 Revision 02
Article No 771074115 Issue 01/2010
Clean and check condition of all parts that have been
removed. In case of doubt, components should be
replaced. Wearing parts (roller bearings) and seals
must always be replaced.
If parts or half-open pumps are to be stored for any
length of time, they must be protected from dirt and
corrosion.
8.7.1 Model with Packing Gland (Code "P") – MPB
Design
For the associated sectional drawing, see the
appendix.
Disassembly
Remove the motor as described in Section 8.5.1
"Replacing the Rolling Bearing – MPB Design"
Disassembly.
Screw off the shaft nut (50) (sickle wrench), the
shaft nut has a lock to prevent loosening.
If this lock is no longer sufficient, the nut must be
replaced.
Pull off the coupling half (7/P) with the withdrawing
screw.
Remove the key (PF4).
Screw off the nuts (M3) and remove the gland
(69).
Pull out the worn packing ring (P).
Pull off the shaft wearing sleeve (44), pull out the
O-ring (OR4).
Depending on the wear of the running surface
(less than 0.5 mm on the diameter), the shaft
wearing sleeve (44) can be evened out (fine
lathing and polishing or grinding). In the case of
severe wear, the shaft wearing sleeve (44) must
be replaced.
Remove the remains of the packing ring (P) from
the gland chamber and clean all other parts.
Degrease the shaft (24) and do not yet coat with
lubricant.
Assembly
Slide on the O-ring (OR4) and coat with lubricant
(e.g. silicone grease) using a small brush.
Coat the shaft wearing sleeve (44) with lubricant in
the hole so that the O-ring grove remains clean
(begin approx. 10-15 mm inside it). The standard
O-rings of EP caoutchouc are not resistant to oil-
containing lubricants and may not come into
contact with such substances. If resistance is
ensured (e.g. beef dripping as lubricant or oil-
resistant O-rings), the entire shaft (24) can be
coated.
Slide on the shaft wearing sleeve (44), insert new
packing rings (P) (see operating manual) and affix
lightly with the gland (69) (nuts (M3)). When
sliding on the shaft wearing sleeve (44), make
certain that the O-ring can slip lightly into the
groove.
Insert the key (PF4).
Mount the coupling half (7/M) onto the pump shaft
as described in Section 5.3.2 "Coupling – MPV
Design") and tighten the bearing nut screw (50).
Then assemble the motor according to Section
8.5.1 "Replacing the Rolling Bearing – MPB
Design".
8.7.2 Model with Packing Gland (Code "P") – MPV
Design
For the associated sectional drawing, see the
appendix.
Disassembly
Disassemble the pump as described in Section
8.5.2 "Replacing the Rolling Bearing – MPV
Design".
Remove the bearing cover (12), spacer sleeve
(72) and thrower (73P).
Remove the key (PF3).
Screw off the nuts (M3) and remove the gland
(69).
Pull out the worn packing ring (P).
Pull off the shaft wearing sleeve (44), pull out the
O-ring (OR4).
Depending on the wear of the running surface
(less than 0.5 mm on the diameter), the shaft
wearing sleeve (44) can be evened out (fine
lathing and polishing or grinding). In the case of
severe wear, the shaft wearing sleeve (44) must
be replaced.
Remove the remains of the packing ring (P) from
the gland chamber and clean all other parts.
Degrease the shaft (24) and do not yet coat with
lubricant.
Assembly
Slide on the O-ring (OR4) and coat with lubricant
(e.g. silicone grease) using a small brush.
Lubricate the shaft protective sleeve (44) in the
borehole) so that the O-ring groove remains clean
(start approx. 10-15mm inside). Standard O-rings
made of EP rubber are not resistant to oil
emulsive lubricants and must not come into
contact with them. Once resistance has been
ensured (e.g. beef dripping as lubricating agent or
oil resistant O-rings) the entire shaft (24) may be
lubricated.
Slide on the shaft wearing sleeve (44), insert new
packing rings (P) (see operating manual) and affix
lightly with the gland (69) (nuts (M3)). When
sliding on the shaft wearing sleeve (44), make
certain that the O-ring can slip lightly into the
groove.
Insert the key (PF3) and slide on the spacer
sleeve (72). The following assembly direction must
be observed.
MPV 100 MPV 125
44 72 44 72
Slide on the thrower (73) and bearing cover (12).
Continue the assembly as described in Section
8.5.2 "Replacing the Rolling Bearing – MPV
Design" .. Assembly.