brevini ED2090MR20FL350B3 Manual De Instalación Y Mantenimiento página 39

Table 1
Tipo giunto
Y
d
S300 3009-185X320 85 M16
S400 3208-185X320 112 M20
S600 3208-220X370 134 M20
S850 3208-240X405 144 M20
S1200 3208-280X460 172 M24
S1800 3208-300X485 176 M24
S2500 3208-340X570 206 M27
S3500 3208-360X590 210 M27
- Set the torque wrench again to setting "T" in tab. 1, then
recheck the torque on the coupling bolts, taking care not to
tighten the bolts further; if this happens , repeat the torquing
procedure.
- When the fitting of the coupling has been completed correctly,
check the assembly visibly to make sure that the front surfaces
of the internal and external rings are on the same plane (see fig.
2 point D).
2.5.4.3 Disassembling the coupling and gear unit
- Gradually loosen the attachment bolts, proceeding in a circular
direction. Initially, loosen each bolt by just a quarter of a turn to
avoid bending and seizing.
ATTENTION: because of the high axial force, if the bolts are
unscrewed totally in one or two turns this could cause the two
rings in the coupling to separate violently, putting the operators
in danger.
- If the coupling rings do not come apart
spontaneously after unscrewing the bolts,
transfer some of the bolts (two bolts at
180° - four bolts at 90°) into the internal
ring extraction holes(see fig. 3).
- Slide the coupling along its axis to
release it and remove cap "Z" (see fig. 4),
and introduce pressurised oil (max. 1000
bar) through the1/8" G hole to facilitate
the detachment of the gear unit from the
machine shaft.
- If this method doesn't free the gear unit (because of the shaft
coupling being unable to hold the pressure), then, if there is
Fig. 4
sufficient space, you can try the method illustrated in fig. 5, using
hydraulic pushers, pressing against the 2 180° bosses on the
X [mm]
per tipo di chiave
T
[Nm]
290 50 100 58
490 55 115 58
490 55 115 58
490 55 115 58
840 65 120 70
840 65 120 70
1250 — 125 85
1250 — 125 85
Fig. 3
Z
gasket holder cover, being careful not to exceed the following
axial loads:
- If the coupling is assembled a long time before it is started up,
S300
S400
S600
S850
S1200
S1800
S2500
S3500
S5000
then you will have to separate the coupling rings (after removing
the gear unit) and clean the mating surfaces thoroughly,
removing any traces of dirt, rust, etc.
- Before reinstalling the overhauled coupling, top up with
lubricant in the zones marked "C" (see fig. 2).
Fig. 5
Axial load [N]
30000
30000
45000
50000
70000
80000
100000
115000
170000
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