Lubrication - Pentair MYERS MDPC Manual Del Propietário

Maintenance
Draining
The pump and piping should always be protected against
freezing temperatures. If there is any danger of freezing,
drain the pump and piping. To drain pump, remove the
drain plug at the bottom of the pump body and remove
priming plug. Drain all piping.

Lubrication

It is never necessary to add oil lubrication to this
centrifugal pump or its motor. The motor is of the sealed
ball bearing type, grease packed for life.
Replacing Mechanical Seal
This pump is furnished with a mechanical seal. It is
properly installed at the factory to prevent leakage, and
requires no further attention. It cannot be adjusted and
no attempt should be made to adjust it. However, it is
sometimes necessary to replace this seal. If so, please
follow the instructions carefully.
The Shaft Seal
The shaft seal consists primarily of two parts, a rotating
member and a ceramic seat.
NOTICE: The highly polished and lapped faces of the
seal are easily damaged. Read instructions and handle
the seal with care.
Removal Of Old Seal
1. Remove motor from pump body.
2. After unscrewing the impeller, carefully remove the
rotating part of the seal by prying up on the sealing
washer, using two screwdrivers (Figure 4A).
3. Tap out the ceramic seat with a screwdriver (see
Figure 4B). Clean cavity from which seal was
removed and clean motor shaft.
Mechanical seal
rotating half
Seal Plate
A-Seal removal-rotating half
Figure 4
Mechanical seal
ceramic seat
B-Seal removal-ceramic seat
Installation Of New Seal
1. Clean polished surface of ceramic seat with a
clean cloth.
2. Wet the O-Ring in the ceramic seat with
soap solution.
3. Press seat into cavity firmly and squarely with
finger pressure. If seat will not locate properly in
this manner, place cardboard washer over polished
face of seat and use piece of 3/4" standard pipe for
pressing purposes. Figure 4C.
4. Dispose of cardboard washer and again be sure
that polished surface of seat is free of dirt or foreign
particles, and has not been scratched or damaged by
the insertion.
5. Inspect shaft to make sure that it is clean.
6. Clean face of sealing washer with clean cloth.
7. Apply soap solution to inside diameter and outer
face of rubber drive ring.
8. Slide seal assembly onto shaft (sealing face first) until
rubber drive ring slides over shaft shoulder.
9. Screw impeller onto shaft until impeller hub hits
shaft shoulder. This will automatically locate seal in
place and move the sealing washer face up against
floating seal face. Figure 4D.
10. Reassemble pump in reverse order of disassembly.
3/4" socket
or pipe
Cardboard
washer
(supplied w/seal)
Polished
surface
Rubber
surface
C-Ceramic seat installation
Shaft
shoulder
Rubber drive
ring
Sealing
face
Impeller
D-Rotating half installation
567 0395
6