MTH PUMPS E51 SERIES, Руководство пользователя

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Figure 4-2
4.
Figure 4-1
Section T51 • E51 Page 508
Dated February 2014
T51 • E51 SERIES
Service
PUMP ENDS
A. Preliminary
B. Disassembly C3 & P3
C. Disassembly C15 & P15
D.
Disassembly D3 (E51)
E.
Inspection of Components
F. Reassembly C3 & P3
G. Reassembly C15 & P15
H. Reassembly D3 (E51)
H.
Testing and Final Adjustments
4A Preliminary
Before attempting any service on the
pump or motor, disconnect the elec-
trical power to the pump motor. If the
pump and motor are to be removed
as a unit, note the wiring configura -
tion. Use colored or numbered tape
to mark the wire connections of the
motor and power source, for recon-
nection. If the pump is being used to
transfer hot liquid, let the pump and
liquid cool before starting disassem-
bly.
1. Disconnect the inlet and outlet pip-
ing before unbolting the pump and
motor. If the pipes are corroded,
use penetrating oil on the threads
to aid in removal.
2. Unbolt the motor from the base
and remove the unit. All work on
the unit should be performed on
an elevated workbench whenever
possible.
The disassembly and reassembly
procedures are broken into four sec-
tions covering the following units:
4B — Disassembly of the C3 and P3
Units (3 hp and under)
4C — Disassembly of the C15 and
P15 Units (5 hp and up)
4D — Reassembly of the D3 (E51)
Units
4F — Reassembly of the C3 and P3
Units
4G — Reassembly of the C15 and
P15 Units
4H — Reassembly of the D3 (E51)
Units
Exploded views of each unit, Figures
4-4, 4-5, 4-11, and 4-12, are provided
for referencing the numbers in the
following procedures, i.e. (#1), motor
bracket.
4B Disassembly (C3 and P3)
The following tools and equipment
are needed for disassembly of C3
and P3 units:
1. Soft plastic or wooden mallet.
2. Small ball peen hammer.
3. 9/16” wrench or socket.
4. 5/32” hex wrench.
5. Penetrating oil.
6. 1” wood dowel (Approx. 6” long).
7. Thin blade screwdriver.
8. Two large blade screwdrivers.
9. Cealube G or similar glycol base
lubricant. (DO NOT use petroleum
products.)
To disassemble the pump:
Refer to Figures 4-4 and 4-5 for refer-
ence to the numbered parts in the
procedures below.
1. Remove all liquid from the pump.
Air blown through the pump will
remove the water quickly.
2. Remove the two (2) nuts (#20),
and the two (2) 3/8” X 4” bolts
(#19) from the cover (#2).
3. Remove the cover. In some
cases light tapping with a plastic
or wooden mallet on the outside
diameter of the cover may be
required to loosen it from the
motor bracket. Care should be
taken if a screwdriver is needed to
pry between the cover and motor
bracket. Damage to the “O” ring
(#7) and/or impeller can result.
4. Remove the impeller (#11), refer
to Figure 4-1. The impeller is a
slip fit and, under normal condi -
tions, can be removed by gently
tapping on the end of the shaft
sleeve with a mallet. Leave the
impeller key (#23) in place. Strik-
ing the sleeve too hard could
damage the seat or rotating ele-
ment.
5. Using the 5/32” hex wrench,
loosen the set screws (#15) in the
locking collar (#14), located on the
shaft sleeve between the motor
bracket and the motor face. The
collar should now be loose on the
sleeve. Note the condition of the
setscrew in the collar and replace
if necessary.
6. Remove the shaft sleeve (#17).
The sleeve is a keyed fit and is
removed using two large screw-
drivers, Refer to Figure 4-2.
a. Insert the blades of the
screwdrivers between the
springholder on the rotating
element and the shoulder of the
shaft sleeve.
b. Holding the screwdrivers at
approximately 3 o’clock and
9 o’clock, push the handles in
toward the motor body, using
the motor bracket for leverage.
7. In some cases a rocking motion of
the screwdrivers will be neces-
sary to break the sleeve loose.
Normally the rotating element will
slide off with the sleeve. DO NOT
attempt to remove the sleeve by
rotating it. (Previous models have
used a threaded shaft and differ-
ent procedures are required in
these cases.)
8. Remove the rotating element
from the sleeve. Refer to Fig-
ure 4-3. The element normally
adheres tightly to the sleeve and
some force may be necessary to
remove it. This is common and
if care is taken, the element can
be reassembled and reused. It
is recommended that a new
rotating element be used for