Operation & Maintenance Manual
Jaw Bearings
Pitman Bearing Removal
To remove and replace pitman bearings it will be
necessary to remove the pitman and shaft
assembly from the crusher frame.
When bearings are determined to need
replacement, it is recommended to remove as
much of the lubricant from the bearing housings by
draining them while still warm from operation.
The following procedures should then be
followed:
CAUTION
Caution should be used during the
following procedures and proper
personal protection equipment and
tools are to be used to ensure
personnel and equipment safety.
1) Lockout & Tagout crusher drive.
DANGER
Failure to Lockout & Tagout will
result in death or severe personal
injury.
DANGER
Care must be taken to stay clear of
inside of crusher as well as
underneath the crusher while
performing bearing replacement as
falling parts will result in death or
severe personal injury.
CRSH-OM-0003ENG(OCT-2014)
2) Using the procedure shown earlier in this
section, remove the toggle plate from the
crusher.
3) Mark the flywheel/drive sheave and pitman
shaft so it can be re-installed in the same
location.
4) Install appropriate lifting slings and use an
adequate lifting device to support flywheel/
drive sheave.
5) Remove pitman shaft cover and remove
ringfeder that retains flywheel/drive sheave to
pitman shaft. See (Figure 7 - 32)
6) Remove flywheel/drive sheave from shaft and
set aside.
7) Slide outside seal and key off of pitman shaft
and set aside.
8) Repeat this for the opposite side flywheel/
drive sheave so that both sides have been
removed.
9) Install appropriate lifting slings and use an
adequate lifting device to support the entire
pitman and shaft assembly.
10) Once the pitman and shaft assembly is
supported, remove the bolts holding both side
frame bearing housings to the crusher frame.
11) Once the bolts are removed, lift the pitman
and shaft assembly from the crusher frame.
See (Figure 7 - 35)
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Model CT-Series Jaw Crushers
Operation & Maintenance Manual
Jaw Bearings
16) Remove bolts from both pitman bearing
covers, remove covers and set aside. See
(Figure 7 - 37)
Figure 7 - 35 Pitman and Shaft Assembly Removal
From Crusher Frame
12) Lift pitman and shaft assembly and place it
onto cribbing or platform on the ground.
See (Figure 7 - 36)
Figure 7 - 37 Pitman Bearing Covers
17) Next, support pitman shaft at outer ends and
fasten slings from a suitable lifting device.
18) While supported, press shaft with bearings
through and out of the bore of the pitman
housing. See (Figure 7 - 38)
Figure 7 - 36 Pitman and Shaft Assembly Placed on
Ground
13) The frame bearings and housings will now be
able to be removed from the pitman shaft
using the procedure found earlier in this
section.
14) Once the frame bearings and housings are
removed from the shaft, proceed to the next
steps to remove the shaft with bearings from
the pitman housing.
15) Remove pitman seals from the shaft.
Figure 7 - 38 Pitman Shaft and Bearings Being Pressed
from Housing
CRSH-OM-0003ENG(OCT-2014)
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Model CT-Series Jaw Crushers
Operation & Maintenance Manual
Jaw Bearings
19) Place shaft with bearings onto suitable
cribbing or platform supported at the outer
ends of the shaft. See (Figure 7 - 39)
Pitman Bearing Installation
Replacement with a new bearing requires
determining the bearings unmounted radial
internal clearance before installation.
See (Figure 7 - 41)
This clearance measurement should be taken and
recorded to be referenced later when checking
bearing final clearance after mounting in the
pitman housing.
Figure 7 - 39 Pitman Shaft and Bearings Removed from
Housing
Thoroughly clean the pitman housing, shaft and all
parts that are to be re-used.
20) Press or pull each bearing and grease keeper
from shaft while maintaining support on the
shaft. See (Figure 7 - 40)
Feeler Gauge Blade
Internal
Clearance
Figure 7 - 40 Pitman Shaft Bearings Being Pressed Off
Shaft
21) To fully remove each bearing and grease
keeper from the shaft, it will be necessary to
lift each end of the shaft from its support so
bearings and grease keepers can be slid off
shaft.
CRSH-OM-0003ENG(OCT-2014)
Figure 7 - 41 Jaw Bearing Radial Internal Clearance
Measurement
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Model CT-Series Jaw Crushers
Operation & Maintenance Manual
Jaw Bearings
CRSH-OM-0003ENG(OCT-2014)
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Model CT-Series Jaw Crushers
Operation & Maintenance Manual
Jaw Bearings
11) Install appropriate lifting slings and use an
adequate lifting device to support the entire
pitman and shaft assembly.
12) Lift pitman and shaft assembly into crusher
frame, align frame bearing housings with
crusher frame and install bolts.
See (Figure 7 - 46)
13) Torque frame bearing housing bolts to proper
torque.
14) Reinstall each side flywheel/drive sheave
using the procedures shown earlier in this
section.
15) Reinstall toggle plate using the procedures
shown earlier in this section.
16) Once pitman and shaft is re-assembled into the
crusher, complete grease replenishment into
each pitman and frame bearing and seals using
the quantities listed in the tables in the
Lubrication Section of this manual. Take into
consideration also the amount of grease put
into each pitman bearing initially.
17) Remove the Lockout & Tagout from the
crusher drive.
Crusher should now be ready to re-start.
Figure 7 - 46 Pitman and Shaft Assembly Installed Into
Crusher Frame
CRSH-OM-0003ENG(OCT-2014)
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Model CT-Series Jaw Crushers
Operation & Maintenance Manual
Jaw Bearings
6) Measure each bearings internal installed
clearance to assure that the bearings have the
proper amount of clearance once installed.
See (Table 7 - 5)
Table 7 - 5 Pitman Bearing Radial Internal Installed
Clearance
Jaw
Model
Min.
7) Using the proper type grease shown in the
tables in the Lubrication Section of this
manual, inject grease into the voids between
the rollers in the bearing, making certain that
it is forced into the center of the bearing. Note
the amount of grease injected into each of the
pitman bearings.
8) Install each side pitman bearing cover and
torque bolts to proper torque.
See (Figure 7 - 45)
Max.
mm
in.
mm
in.
CT1030
0.20
0.0079
0.26
0.0102
CT1040
0.20
0.0079
0.26
0.0102
CT1048
0.20
0.0079
0.26
0.0102
CT1252
0.22
0.0087
0.29
0.0114
CT2036
0.24
0.0094
0.32
0.0126
CT2436
0.26
0.0102
0.35
0.0138
CT2645
0.26
0.0102
0.35
0.0138
CT3042
0.31
0.0122
0.41
0.0161
NCT3042
0.26
0.0102
0.35
0.0138
CT3254
0.31
0.0122
0.41
0.0161
CT3648
0.34
0.0134
0.45
0.0177
CT4254
0.37
0.0146
0.50
0.0197
9) Re-install pitman seals onto shaft.
CT4763
0.41
0.0161
0.55
0.0217
CT6080
0.44
0.0173
0.60
0.0236
10) Re-install frame bearings onto shaft using
procedures shown earlier in this section.
CRSH-OM-0003ENG(OCT-2014)
Figure 7 - 45 Pitman Bearing Covers Installed
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Model CT-Series Jaw Crushers
Operation & Maintenance Manual
Jaw Bearings
1) Lift and slide grease keepers onto shaft
making sure they seat fully against the
machined surfaces of the shaft.
See (Figure 7 - 42)
Figure 7 - 43 Pitman Shaft Bearings On Shaft
Figure 7 - 42 Pitman Shaft Grease Keepers On Shaft
2) Bearing installation onto the shaft will be
easier if they are first heated to expand
slightly. The bearings can be heated using
several methods. One method is using an oil
bath. Maximum temperature of the oil bath
should not exceed 120 C (250 F).
4) With adequate lifting device and slings lift the
shaft assembly and start the bearing into the
pitman housing bore, making sure it is square
with the face of the pitman housing.
5) Apply pressure on the shaft assembly and
press it into the pitman housing until each
bearing race is the same distance from the
edge of the pitman housing.
See (Figure 7 - 44)
NOTICE
Bearings should be allowed to heat
long enough to fully expand. Do
not allow bearings to come into
direct contact with the heat source.
3) With adequate lifting device and slings lift
each of the heated bearings into place against
the grease keepers and hold them firmly in
postition until they cool enough to seat on the
shaft. See (Figure 7 - 43)
Figure 7 - 44 Pitman Shaft and Bearings Pressed into
Housing
CRSH-OM-0003ENG(OCT-2014)
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Model CT-Series Jaw Crushers
