Figure 14-3.Mobile concrete mixer plant.
Operators, assigned to the crete mobile, must read
thoroughly and understand the technical manual before
operating the plant. A few safety precautions when
operating the crete mobile areas follows:
l Follow all preventive maintenance procedures.
l Do NOT allow any foreign matter in the cement
l Do NOT allow particles larger than 1 1/2 inches
in the aggregate bin.
l Do NOT allow the waterlines and flowmeters to
freeze with water in them.
l Do NOT run the water pump dry.
. Do NOT continue to operate the machine if the
hydraulic oil temperature exceeds 190°F.
. Wash out the auger within 20 minutes of the last
. Never attempt to repair the machine while in
operation (always turn the power source off).
l Keep your entire body clear from all moving
l Never attempt to walk on top of the aggregate bin
to cross from the cement bin to the water tank (use the
l Never walk or stand under the auger.
. Never climb inside the aggregate bin (use a small
pole to dislodge any aggregate that has bridged).
. Never enter the cement bin while in operation
(there are moving parts inside the bin).
Augers are rotary drills with a helix or screw thread
on drill rods, called augers or flights. Augers can be
truck- or skid-mounted or hand-held. Figure 14-4
shows a 5-ton tactical auger truck commonly used in the