TM 5-3820-233-35/2
CHAPTER 4
CRUSHING AND SCREENING PLANT REPAIR INSTRUCTIONS
Section I. ROCK AND SAND CONVEYORS
55. General
(1) Clean all parts with an approved cleaning
solvent and dry thoroughly.
The sand conveyor is located on the right side of the
(2) Inspect conveyor frames for serious
plant, and the rock conveyor is located on the left side
damage. Repair or replace a damaged frame.
of the plant. These two side conveyors receive sand
(3) Inspect pulleys for dents, cracks and other
and rock from the screen ho r, and deliver it to trucks or
damage. Repair or replace a damaged pulley.
onto a stock pile. Both conveyors are hinged so that
(4) Inspect bearings for scoring, pitting, and
they can be folded for transports.
binding. Replace a defective bearing.
(5) Inspect skirtboards and flashing for wear
56. Rock and Sand Conveyors
and damage, and replace if necessary.
(6) Inspect conveyor belts for wear and
a. Removal. Refer to para 24 and remove the rock
fraying. Replace a worn or defective belt.
and sand conveyors.
(7) Inspect trough and return roll assemblies
b. Disassembly. Disassemble the rock and sand
to make sure they turn freely. Replace defective
conveyors in the numerical sequence as illustrated on
component parts or the whole assembly as required.
(8) Inspect all parts for damage, and replace
c. Trough Roll Disassembly
defective parts.
(1) Disassemble the trough roll assembly in
the numerical sequence as illustrated on figure 33-2.
reassemble the bearing assemblies.
(2) To remove bearings (15 and 19), remove
h. Return Roll Reassembly.
Reassemble the
nuts (13 and 14) from both ends of the roll and shaft
return roll assemblies in the reverse of the numerical
assembly. Tap lightly on one end of the shaft until
sequence as illustrated on figure 33-3.
bearing (15), 0-ring (16), washer (17), snap ring (18),
i. Trough Roll Reassembly.
Reassemble the
and shaft (23) are free of the roll shell. Insert a suitable
trough roll assembly in the reverse of the numerical
pusher tool in end of roll shell opposite bearing (19) and
sequence as illustrated on figure 33-2.
remove the bearing.
j. Reassembly. Reassemble the rock and sand
d. Return Roll Disassembly.
Disassemble the
conveyors in the reverse of the numerical sequence as
return roll assembly in the numerical sequence as
illustrated on figure 331.
illustrated on figure 33-3. Remove bearings (5 and 9) in
k. Installation. Refer to para 24 and install the rock
the same manner as described in step c above.
and sand conveyors.
disassemble bearing assemblies (29 and 69, fig. 33-1).
f. Cleaving, Inspection, and Repair.
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