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10.2
Indications to the spare part order
Spare parts are available from the supplier.
Standard commercially available parts are to be
purchased in accordance with the model type.
The ordering of spare parts should contain the
following details:
1. Pumptype
e.g. BFT1250
2. Pump No.
e.g. 12168075
The date of the construction year is a compo-
nent of the pumps type number.
3. Voltage, Frequency and Power
Take item 1, 2 and 3 from the nameplate
4. Spare part with item No.
e.g. connection cover item No. 52
11 Repair Instructions / Replacing the
rotary mechanical seal / the shaft clamp
11.1 Replacing the rotary mechanical seal
Wear safety gloves!
Risk of injury due to sharp edges on pump compo-
nents, i.e. impeller blades.
1) Disconnect the pump electrically and mechani-
cally. Note the markings on the pump compo-
nents prior to dismantling. When completely
dismantling a unit with dual axial face seals,
drain the medium in the blocking chamber
through the screw plug (32).
2) Loosen the Socket head cap screws (38).
3) Loosen and remove the connection cover (52)
from the pump plate (53). Remove O-ring (35).
4) Remove the Impeller nut (57).
5) Use two screwdrivers to push the impeller (55)
from the insert shaft (91). Insert the screwdrivers
between the impeller (55) and the pump plate
(53).
6) Remove the woodruff key (64) and the spacer
sleeve (59) or (at special version) the distance
plate (66) and bushing cartridge assembly (65)
from the quick shaft (91). Loosen the Socket
head cap screws (37) and remove the pump
plate (53) and O-ring (34).
Remove the circlip (25) and shim ring (22) from
the insert shaft (91). Remove the rotating axial
face seal unit (24b-24e).
Pumps with double mechanical seal (-GD)
7) Loosen the Socket head cap screws (17) and
remove the intermediate pump body (50).
8) Remove circlip (25) and shim ring (22) and
remove the rotating axial face seal unit (24b-
24e).
To replace the insert shaft, see position 11.2).
When changing an axial face seal, remove the
stationary axial face seal unit (24a) from the in-
termediate pump body (50) and pump foot (12).
Clean the seat of the seal and the pump parts!
BE8075
The mechanical seal (24) should now be com-
pletely replaced. If necessary replace the O-
rings (34, 35) and impeller (55).
9) Fit a new mechanical seal.
The sliding surfaces of the axial face seal must
be free of dirt and grease. Lightly moisten the
collar (24a) with prill water and press the sta-
tionary axial face seal unit (24a) into the inter-
mediate pump body (50) and pump foot (12).
Slide the rotating axial face seal unit (24b-24e)
onto quick shaft (91) and fix in position using
shim ring (22) and circlip (25).
10)The remaining assembly steps are Pos 3) to 8)
in reverse order.
Edition 12/2016
Page 8 of 10
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