Metso MP1000, Technical Reference Manual

Page: 162 / 180

SECTION 4 - COUNTERSHAFT, CTRSHAFT BOX & SHEAVE ASSEMBLIES
4-8
MP SERIES CONE CRUSHER TECHNICAL REFERENCE MANUAL
Figure 4-8 Sheave Assembly
8. Insert the take-up bolts through the bolt
holes and alternately tighten each bolt a
small amount until all bolts are tightened to
a final torque value. Refer to Table 4-1 for
proper torque values for the MP1000 and
MP800. Do not lubricate the bolt threads or
the tapped holes. When the sheave is finally
positioned a clearance of approximately
10 mm (0.375") on the MP1000 or 6 mm
(0.25") on the MP800 should exist between
the face of the sheave hub and the flange of
the bushing. No attempt should be made to
take up this clearance as this clearance
assures the proper fit and grip between
sheave bushing and countershaft. Follow the
torque requirements closely. Overtightening
the take-up bolts could cause the sheave to
crack.
Table 4-1 Crusher Sheave Take-up Bolt Torque
4.2.3 Crusher Sheave Removal
To remove the crusher sheave and proceed as
follows (refer to Figure 4-8):
1. Remove the take-up capscrews and thread
two of them into the tapped holes in the hub
of the sheave. Using the two capscrews as
back-off bolts, exert pressure by tightening
them against the flange of the bushing,
breaking the sheave grip on the bushing
cone. Remove the sheave.
2. Loosen sheave bushing clamp screw.
3. If necessary, insert a wedge such as a
screwdriver into the split in the bushing
flange and slide the bushing off the
countershaft.
4.2.4 Flexible Coupling Removal
Remove the flexible coupling half from the
countershaft as described in the coupling
manufacturer’s instructions.
4.3 Maintenance
4.3.1 Countershaft Box Disassembly
Disassemble the countershaft box and countershaft
assembly for replacement of bushings, pinion or
other worn parts, as follows (refer to Figure 4-9):
1. To gain access to the countershaft box, it
will be necessary to remove the bowl, head,
and lift the counterweight.
Callout Description
1 Flange diameter
2 Sheave
3
Combination take-up and back-off
capscrews
4 Tapered surfaces
5 Bushing
6 Sheave hub
7 Clamp screw
8 Countershaft
2
1
8
7
6
5
4
3
Crusher
Size
No. of
Bolts
Sheave Take-Up Bolt
Torque
MP1000 5 1017 Nm (750 ft.lbs)
MP800 4 813 Nm (600 ft.lbs)
NOTICE
Should there be difficulty breaking the fit
between the sheave and bushing, tap the
end of the shaft or bushing with a babbitt
hammer while maintaining back-off bolt
pressure, until the sheave is loose enough
to remove.