TM 5-3820-233-35/2
1
Setscrew
8
Shim
15
Seal
2
Collar
9
Bearing cup
16
Snap ring
3
Seal
10
Bearing cone
17
Fitting
4
Seal
11
Bearing cup
18
Identification plate
5
Snap ring
12
Setscrew
19
Housing
6
Shim
13
Collar
7
Shim
14
Seal
Figure 39-4. Trunnion bearing assembly.
Section VI. VIBRATING SCREEN AND VIBRATOR UNIT
forward toward the discharge end of the screen providing
66. General
efficient screening action and separation of the aggregate
The vibrating screen receives aggregate from the
according to size screen wire openings in the box. The
overhead conveyor. It is composed of three major
oversized aggregate drops from the discharge end of the
subassemblies: a welded steel base, full floating screen
vibrating screen to the roll crusher for resizing.
box, and a screen vibrator unit. The screen vibrator
unit, from which the screen derives its motion, is driven
67. Vibrating Screen
by V-belts from the screen drive countershaft. The
directional movement of the screen box is determined
a. Removal
by the position of the two eccentric shafts of the
(1) Remove the vibrating screen, vibrator unit,
vibrating unit, and the angular position of the screen box
and screen hopper (para 27).
support springs. During each cycle of the screen action,
(2) Place a suitable support under the vibrator
the screen box and aggregate move forward and upward
unit (fig. 40-1) and remove capscrews and nuts (38 and 40,
at an angle of 35
.
When the extreme upward
movement is reached, the screen drops away from the
aggregate. Each cycle lifts the aggregate and moves it
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