Metso MP1000, Technical Reference Manual

Page: 164 / 180

SECTION 4 - COUNTERSHAFT, CTRSHAFT BOX & SHEAVE ASSEMBLIES
4-10
MP SERIES CONE CRUSHER TECHNICAL REFERENCE MANUAL
13. Remove the lifting sling from around the
pinion end of the countershaft box then
attach the sling just removed around the box
on the outside of the Crusher as close to the
countershaft box frame opening as possible.
14. Lift the countershaft box slightly and move
it out far enough until the pinion end
countershaft box flange is in the outer bore
of the main frame countershaft box opening.
Then lower the pinion end and allow the
pinion end flange to rest in the frame box
bore.
15. Reposition the pinion end lifting sling so a
balanced lift of the countershaft box
assembly is obtained. Then remove the
assembly completely out of the Crusher.
16. Remove the flinger housing on the MP1000.
On the MP800 remove the countershaft box
cover.
17. Heat the oil flinger to approximately 30°C
(50°F) above ambient temperature
18. Place a pry bar between the flinger and the
countershaft box and exert moderate
pressure. Once the flinger starts to move,
grasp each side of the flinger and pull the
flinger straight off the shaft.
19. Pull the countershaft out of the countershaft
box.
4.3.2 Pinion Replacement
Whenever the countershaft box is out for inspection
or replacement of parts, it is advisable to inspect the
pinion for wear or broken teeth. Pitting or galling
on the face of the teeth are good indications of
excessive wear. This can be due to improper tooth
contact resulting from an incorrect quantity of
shims being placed under the lower thrust bearing,
by overloading the Crusher or using excessively
dirty oil. A worn pinion is more susceptible to tooth
breakage. Also, running on a worn pinion could
lead to structural damage in other parts due to
vibration. Excessively worn pinions should be
replaced. To get maximum benefit from new parts,
it is recommended that gear and pinion be replaced
at the same time. If a new pinion is run with a worn
gear, the root clearance must be checked as
instructed under Checking or Adjusting Backlash
and Root Clearance
in
Section 5
. To replace the
pinion, proceed as follows:
1. Remove the countershaft assembly from the
countershaft box and place the countershaft
on suitable wooden blocking.
2. Insert an M36 ring bolt on the MP1000, or
an M20 ring bolt on the MP800, into the end
of the countershaft opposite the pinion and
hang from a crane as shown in Figure 4-10.
3. Heat the pinion with a torch to
approximately 100°C (180°F) above
ambient temperature. Repeatedly bump the
pinion with a heavy wooden ram while
continuously moving the flame around the
outside of the pinion. Keep bumping the
pinion until the pinion falls free of the
countershaft.
4. Heat the replacement pinion, in an oil bath
or with a torch (adjusted to a low heat) to
approximately 90°C (160°F) above ambient.
Quickly place the pinion on wood blocking
and lower the countershaft into the pinion to
where the shaft protrudes out of the pinion
bore. This is best accomplished by clamping
a piece of bar stock across the center of the
pinion with two pieces of 5 mm (0.197")
shim stock for the MP1000 or 10 mm
(0.393") shim stock for the MP800 between
the bar and pinion as shown in Figure 4-11.
The bar will act as a stop and the pinion can
then be pushed onto the shaft until the bar
bumps against the end of the shaft. Do not
tack weld the bar to the pinion.
WARNING
Use heavy, well insulated gloves when
handling the heated oil flinger.
WARNING
Use heavy, well insulated gloves when
handling the heated pinion.