TM 5-3820-233-35/2
Note.
The movable roll shell is mounted on a spider
Spring adjusting block (224, fig. 42-1)
which is pressed and keyed on the shaft. Both ends of
this shaft are mounted in roller bearing housings, which
in is spot welded to the frame and
are so fitted to move under tension between the slide bars
counter shaft housing (3131), and
to keep the movable roll in close alignment with the fixed
should not be removed unless
roll.
absolutely necessary.
c. In order to transmit the power necessary for
crushing and provide the required speed reduction of the
e. Slide Bar Disassembly
roll shells, a countershaft is furnished with a pinion which
(1) Disassemble tension roll spring and shear
drives a large gear on the shaft of the stationary roll
washer (d. above).
assembly. Finger gears, located on the opposite side,
(2) Disassemble the slide bar and associated
synchronize the speeds of stationary and movable roll
parts 110 through 121 in the numerical sequence as
assemblies.
Temporary misalignment, caused by
illustrated on figure 42-1.
passage of tramp iron or a surge of material, does not
affect their smoothness of operation. The spur, pinion,
Note.
and finger timing gears are totally enclosed in a housing.
It may be desired to remove the finger
d. The amount of opening between rolls can be
gear guard and finger gears (step f)
increased or decreased very simply and quickly by
before re moving the slide bars.
removing or inserting shims in slots on top of the frame.
A feed hopper is placed over the opening between the
f. Finger Gear Disassembly.
rolls to deliver the material to rolls.
(1) Drain lubricant from the finger gear guard
assembly (Operator's Manual).
72. Roll Crusher
(2) Disassemble parts 123 through 136.
(3) Remove nut (137), washer (138), bolt (139),
b. Pinion Gear and Spur Gear Disassembly
castle nut (140), spindle flasher (141), and key (142).
(1) Drain lubricant from the spur gear guard
(4) Reassemble castle nut (140) on shaft, but
assembly (Operator's Manual).
do not tighten.
(2) Disassemble parts 11 through 26 as
(5) Refer to figure 42-2 and remove the finger
illustrated on figure 42-1.
gears using Special Tools 4400A55 and 45500-752-12.
(3) Remove capscrew (27), nut (28), castle nut
When the gear breaks loose from the shaft, attach a
(29), washer (30), and key (31).
suitable lifting device to the gear, and remove the castle
(4) Using a suitable gear puller, remove pinion
nut and finger gear.
gear (32).
(6) Use the same procedure as discussed in
(5) Remove bolt (33), nut (34), washer (35),
steps 3 through 5 above to remove the remaining finger
castle nut (36), spindle washer (37), and key (38).
gear.
(6) Reassemble castle nut (36) on shaft, but do
(7) Disassemble parts 151 through 171 in the
not tighten.
numerical sequence as illustrated on figure 42-1.
(7) Remove the spur gear using Special Tools
g. Roll shaft Bearing Disassembly
shown on figure 42-2. When the spur gear breaks loose
from the shaft attach a lifting device to the gear, and
Note.
remove the castle nut and spur gear.
The movable and stationary roll shaft
(8) Disassemble parts 40 through 5f6 (fig. 42-
bearing assemblies complete with roll
1).
shells
are
disassembled
and
c. Hopper Disassembly.
Disassemble parts 57
assembled in the same manner. The
through 101 in the numerical sequence as illustrated on
notable roll shaft bearing disassembly
is discussed in the following steps.
d. Tension Roll Spring and Shear Washer
The stationary bearing assembly
includes parts 255 through 297 as
tension roll springs and shear washers.
illustrated on figure 42-1.
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