TM-5-3895-372-20
CONCRETE-MOBILE MIXER BODY M919, MODEL 8CM-24/F
TECHNICAL MANUAL; ORGANIZATIONAL MAINTENANCE MANUAL
AUGUST 1980
TM-5-3895-372-20 - Page 26 of 694
TM 5-3895-372-20
Section V AGGREGATE SUPPLY SYSTEM
2-11.
INTRODUCTION.
The aggregate supply system is composed of:
a.
A sand bin (on the left).
b.
A stone bin (on the right).
c
.
Gates controlling sand and stone delivery.
d.
A conveyor assembly which carries aggregates to the mixing trough.
Although the bins are called "sand" and "stone" bins, their controls are the same.
The vibrators mounted on the bins are
described in paragraph 2-20.
2-12.
DESCRIPTION.
1.
SCREENS (6).
Sift sand and stone as they are loaded into the hopper.
Keep large lumps and foreign objects
out of bins.
2.
RACKS (2).
Welded to gates on bins.
Open and close gates as pinions turn.
3.
PINIONS (2).
Mesh with racks to raise and lower gates when hand wheels are turned.
4.
RUBBER GUIDES (5).
Keep sand and stone on belt and prevent mixing between bins.
Two on eachside and
one in center.
5.
METAL GUIDES (2).
Keep aggregates and dry cement from falling off belt.
(One on each side.)
6.
CHAIN OILER.
Drips oil onto chains as belt turnms.
7.
BELT.
Carries sand and stone from bins through gates to mixer trough.
Rubber belt is bolted to cross bars.
8.
BELT WIPER.
Adjustable rubber scraper removes aggregates and cement stuck to belt.
9.
SAND DEFLECTOR.
Channels sand onto center of belt
10.
BELT CHAIN.
Used for belt rotation.
11.
BELT LACER.
Used for adjoining ends of belt
12.
UNIVERSAL JOINTS (2).
Transmit rotation of handwheel shafts to pinion shafts.
13.
STOP SCREWS42).
Hold handwheel shafts at proper setting.
Loosen to allow turning of handwheels
14.
HANDWHEELS (2).
Allow operator-to set gate openings through rack and pinion action.
Pointers attached to
handwheel shafts indicate settings on dials.
15.
BELT TENSIONING DEVICES (2).
Hold front sprocket in place.
Used to adjust belt tension.
16.
FRONT SEALS (2).
Prevent aggregates from falling through conveyor belt openings in front of bins.
2-12
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