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Assembly
The pump should be assembled by carrying out the steps of disassembly in reverse. Pay attention to the following
points.
•
Replacement of O ring and gasket
When replacing the O ring or gasket, be sure to install a new one. In addition, see that the O ring or gasket is not
twisted or pressed by another part.
* The sealing section should be cleaned free of dust or scratches before installation.
•
Fastening Bolts
Fasten the bolts in diagonal order by applying the fastening torque shown in the following table. Apply an equal
torque to each bolt.
Model
Type
Fastening torque
N·m
Size of bolts
MDF-L 250
Hex. head bolt
12.5
M8
×
35L, M8
×
65L
MDF-L 401
M8
×
40L, M8
×
70L
MDF-L 422, 423, 425
Hex. socket head bolt
24.5
M10
×
40L, M10
×
75L
* Note on MDF-L 250, 401
(1) Attach the impeller onto the magnet capsule. If this is difficult, warm the magnet capsule in hot water (about
90 deg. C) for 5 minutes before attaching it.
*
Note on MDF-L 422, 423 and 425
(1) Attach the impeller to the magnet capsule.
Rotate the impeller clockwise, and tightly screw it in the magnet capsule. If it is hard to screw in,warm the magnet
capsule putting it in hot water of approx.90 deg. C for 5 minutes.
(2) Insert the impeller and the magnet capsule unit to the rear casing. Then, the rear casing, the impeller and the
magnet capsule set is installed onto the foot support.
Caution
•
Since the magnet used in the pump is very powerful, be careful
not to get your fingers caught between elements by inserting
wood pieces or plastic pieces between the rear casing and the
foot support.
(3) Confirm there is no dust or scratches on the seal surface of the front
casing. Then, attach the O ring onto the front casing.
(4) Attach the front casing onto the foot support.
(5) Fasten the hex. socket head bolts in diagonal order, applying an equal torque to each.
Impeller
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