Mounting Instructions MPE
Paired angular ball bearings in O arrangement
Tighten shaft nut (50) while the bearing is still hot.
Mount bearing bracket (10) and screw on lightly for the time being.
Screw the bearing cover (12) to the bearing bracket (10).
Position the flinger (73) (groove in the spacer sleeve (72)).
Tighten nuts (M2) firmly (see Supplementary Sheet for torque).
Push radial shaft seal ring (WD2) into the bearing bracket (10).
Rotate shaft (24) to see that it runs smoothly.
Mount the coupling guard adapter (95), the key (PF4) and the coupling half (maybe preheat to approx.
80°C).
Fill the bearing bracket (10) with oil.
2.2 Dismantling and mounting of the Intake Side Roller Bearing (K2) –
(Suction side)
See the "Appendix" for relevant sectional drawing.
The mechanical seal must be fixed against the shaft before the disassemble starts. See the description in
chapter 2.4.1 and 2.4.2.
Dismantling
It is analogous the same procedure as at the dismantling of the discharge side bearing.
Place the pump in a horizontal position.
At pumps with suction side drive:
Pull down the coupling half with two-armed withdrawing screw, remove the coupling key (PF4). Remove
the coupling guard adapter (95).
Move back the splash ring (73).
Unscrew nuts (M2) and nuts (M5); pull away the bearing cover (12) from the bearing bracket (10).
Remove bearing bracket (10) (tapping the bearing bracket (10) lightly in an axial direction facilitates
removal). The roller bearing (K2) remains on the shaft (24).
Remove roller bearings (K2) with the with-drawing screw.
If the removal forces of the bearing is too high then try it with careful blows of the hammer on the with-
drawing screw.
Check the surface of the shaft for damage, grind away any furrows.
Assembly
Clean and lubricate the fitting surfaces between the bearing bracket (10) and suction casing (3).
Preheat new bearing (K2) (max. 80°C) and slide it onto the shaft (24).
Tighten the shaft nut (50) while the bearing is still hot, later turn it back a ¼ turn.
Fit bearing bracket (10) and screw on lightly for the time being.
Screw the bearing cover (12) to the bearing bracket (10).
Bring the flinger (73) into position (nut in the spacer sleeve (72)).
Tighten nuts (M2) firmly (see Supplementary Sheet for torque)
Rotate shaft (24) to see that it runs smoothly.
Fill the bearing bracket (10) with oil.
2.3 Replacement of the shaft sleeve with a packing gland / Replacement
of the mechanical seal
This section describes the replacement of the shaft sleeve for designs with a packing gland or the replacement
of the mechanical seal.
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.
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