Assembly Of Adaptors And Discs For Mjb; Alignment - MarelliGenerators MJB 160 Instrucciones Y Advertencias De Seguridad

4.3 Assembly of adaptors and discs for MJB 160

For the MJB 160 type only, in case the assembly of adaptors and discs is carried out directly on the shaft-end, proceed as follows:
- Deeply clean the machined surfaces for the coupling of the adaptor and frame, and make sure that they are not damaged.
- Fit the adaptor up on the frame with n° 6 screws M 10X50 (cl 8.8), washers and nuts. Put on the screws some drops of LOCTITE
243 (picture 1), and cross-tighten them through a 48Nm torque wrench (picture 2).
- Deeply clean the shaft-end by means of a detergent.
Make sure that the disc's contact surface is not damaged.
-
- Insert the spacer "A" in the shaft, the coupling disc and the washer "B". Tighten the parts with n°6 screws M10 class 12,9
supplied in the kit (picture 3), put on the screws some drops of LOCTITE
75Nm torque wrench (picture 4).
Photo1 Photo 2
48Nm

4.4 Alignment

Carefully align the generator and the driving machine.
Inaccurate alignment may lead to vibrations and damage of the bearings.
It is also necessary to verify that the torsional characteristics of generator and driving machine are compatible. In order to allow
torsional analysis calculation (at customer's charge); MarelliMotori can provide rotor drawings for torsional analysis purposes.
For single bearing generators it is further necessary to verify all dimensions of the flywheel and flywheel housing. Furthermore it is
necessary to check the dimensions of the coupling and of the flange on the generator.
For double bearings generators, to check the alignment is necessary to verify with a thickness caliper that the distance "S"
between the half-couplings is the same all the way around and check with a comparator or a rule that the external surface of
the half-couplings are coaxial.
The check must be performed in 4 diametrically opposite points, the alignment errors should be in the limits stated by the
coupling manufacturer and corrected by side displacement or using shims placed between the feet and the base.
Always double-check alignment after tightening fixing bolts.
Perform the control of the vibrations of the generator installed in the group, with this latter operating both with and without a
load.
SIN.UM.017.11
®
Photo 3
A
21
243 (picture 1), and cross- tighten them through a
Photo 4
75Nm
B
ENGLISH
®