Metso MP1000, Technical Reference Manual

Page: 169 / 180

SECTION 4 - COUNTERSHAFT, CTRSHAFT BOX & SHEAVE ASSEMBLIES
MP SERIES CONE CRUSHER TECHNICAL REFERENCE MANUAL
4-15
3. Very quickly slide bushings into bore of
countershaft box making sure the axial
groove is positioned correctly as described
above.
After a new countershaft box bushing has been
installed, follow break-in procedure found in
Section 11 . Also follow V-belt tensioning
procedure found in
Section 2
.
4.3.6 Countershaft Box Assembly
Whenever the countershaft box assembly is
removed for inspection or replacement of parts, it is
advisable to replace the MP1000 O-ring and seal or
the O-ring on the MP800 at the inner flange
between the countershaft box and main frame (refer
to Figure 4-1).
These items may have developed a permanent set
over the years and the resiliency necessary for an
effective seal may have been lost. The O-rings and
seal are inexpensive and not worth an unexpected
oil leak.
Assembly is the reverse procedure of disassembly
with the following exceptions:
1. Insert the countershaft assembly in the
countershaft box.
2. Insert a feeler gauge of proper thickness, as
specified in Figure 4-17, between the pinion
and countershaft bushing.
3. To hold the countershaft stationary, place a
large “C” clamp so that the pinion is
clamped to the countershaft box flange as
shown in Figure 4-15. An alternate method
for holding the countershaft would be to
place the pinion against a firm bearing wall
or similar support.
Figure 4-15 Holding the Countershaft Assembly
4. The oil flinger is equipped with a piston ring
to provide an oil seal between the flinger
and the flinger housing. Check that the
piston ring can be freely turned in the
specially machined groove in the flinger.
Carefully file off any nicks or burrs that may
have formed on the piston ring, causing the
piston ring to bind in the flinger. Replace the
piston ring if necessary.
NOTICE
Wrap the outside of the bushing in a few
layers of fiberglass insulation to prevent the
external build-up of frost which could hinder
the installation of bushing in the
countershaft box. This also helps to achieve
a more thorough cooling.
WARNING
Use heavy, well insulated gloves when
handling the dry ice. Handling dry ice without
protection could result in severe burns.
NOTICE
If the countershaft box is at a temperature of
40°C (75°F) or higher, plain ice can be used
as a substitute for dry ice. Measure the
outside diameter of the bushing and the
bore of the countershaft box to determine
when the bushing has cooled sufficiently.
Callout Description
1 “C” Clamp
2 Countershaft box
3 Pinion
4 Feeler gauge
WARNING
Use heavy, well insulated gloves when
handling the heated oil flinger.
1
2
4
3