Operation - MULTIQUIP MAYCO Series Operation Manual

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.
NOTICE
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.
WARNING
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
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.
PAGE 26 — MAYCO C30HDGA CONCRETE PUMP • OPERATION MANUAL — REV. #1 (09/09/19)
c. 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.
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.
e. 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.
NOTICE
Over-greasing any bearing on your Mayco pump will
not damage the bearing.

OPERATION