MAYCO C-30HDNI PUMP — OPERATION AND PARTS MANUAL — REV. #0 (05/15/03) — PAGE 23
C-30HDNI PUMP — 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 through-
out the job.
2. Before concrete is discharged into the hopper, it is sug-
gested 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.
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)
If hoses or lines are
blocked for any reason,
or if the lines are
kinked when starting up or
during the pumping cycle, the pump pressure
could straighten out the kink or force out the
blockage. This rapid surge of material could
cause the lines to
whip or move in a manner
that could cause injury to personnel.
Inspect the lines at all times to prevent the
above conditions
CAUTION
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 sug-
gestions 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 recom-
mend 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 greas-
ing of all bearings after each job will ensure adequate
lubrication and service to the pump which is normally
operating in wet, gritty conditions.
Over-greasing any
bearing on your
Mayco pump will not damage the
bearing.
NOTE
NOTE
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