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PAGE 14 — C-30HD — PARTS & OPERATION MANUAL — REV. #4 (03/06/01)
C-30HD OPERATING INFORMATION
OPERATING SUGGESTIONS
1. A well-planned location of the pump and routing of the hose
before starting a pour may save subsequent moves
throughout the job.
2. Before concrete is discharged into the hopper, it is
suggested that 3 to 4 gallons of water be sprayed into the
hopper, followed by approximately 5 gallons of a creamy
cement and water slurry (1/2 bag of cement to 5 gallons of
water). This procedure lubricates the hose and prevents
separation and blockages in the hose. Note: Getting the
concrete to flow through the hose at the start of the pumping
cycle can be one of the most critical operations of the pour.
(Manually operate the throttle - when starting. NOT
REMOTELY)
3. It is important that once the slurry procedure is completed,
and you have started concrete flowing through the hose, do
not stop the pour until all the slurry is pumped out and the
concrete has reached the end of the hose. The only time to
stop the pump at the start is if a blockage occurs.
4. When the pump is stopped for any reason during a pour;
e.g., moving hose, waiting for redi-mix truck, the following
suggestions are offered:
A. Leave the hopper full of concrete at the time of shutdown. It
is important not to let the redi-mix driver wash too much water
into the hopper, as this could cause separation of the
concrete in the hopper.
B. If the shutdown period exceeds 2 to 3 minutes, turn off the
engine so the vibration does not separate the mix in the hopper
which can cause a blockage in the manifold when the pump
is started.
C. If it is necessary to wait 10 minutes or more for another load
of concrete, it is wise to start the pump and pump 6 or 8 strokes
every 5 minutes to prevent setting of the mix in the system. If
waiting time is excessive, it would be wise to wash out the
pump and hoses and start over when the new truck arrives.
D. When pumping stiff mixes and there is waiting time between
redi-mix trucks, it is advisable to add some water to the last
hopper of material and “hand mix” to ensure an easier start
with the following load.
E. When the pumping job requires a stiffer mix, the following
method is suggested for starting: Take a water hose with a
nozzle on it and apply water with a fine spray to the concrete
as it comes down the redi-mix chute into the pump hopper
after the slurry procedure is completed and you are ready to
start pumping. Using this procedure will make it easier to pump
through the clean hose. Note: Once the concrete has reached
the end of the hose, do not apply any more water in this manner
as this procedure is used on the start only.
F. Hose sizing is very important: We strongly recommend on
harsh mixes, vertical pushes, stiff concrete, shotcrete, long
pushes, that a 2 1/2” line be used as far as possible. The
advantages of using the 2 1/2” line are improved pumpability,
less pumping pressure and less wear on the pump.
5. Following the pump operation, proper wash out of all
materials or “build-up” within the pump manifold and hoses
will prevent problems when starting the next job.
6. A thorough inspection of the drive components and greasing
of all bearings after each job will ensure adequate lubrication
and service to the pump which is normally operating in wet,
gritty conditions. Note: Over-greasing any bearing on your
Mayco pump will not damage the bearing.
7. Warning: Common sense tells us that if
you drive a truck into a brick wall, something
is going to be damaged. The same holds true
with your concrete pump. If you repeatedly
pull the throttle all the way out and try to force
your pump to push through blockages due to separation of
material in the hose or manifold, you will soon have
breakdowns and costly repairs which are not covered under
warranty. If a blockage occurs, find where it is and clear it before
further pumping. Do not use horse-power; it will only make it
worse.
8. Warning: It will be necessary at times to
move your pump from one job site location
to another. Before moving the pump, make
sure to pump the remaining concrete out of
the hopper. Moving the pump with a full
hopper of concrete can cause severe damage or breakage
of the axle and axle springs, excess strain and pressure on
the hub and bearing assembly.