Multiquip LS-50TD - Manual (Page 30)

PAGE 30 — MAYCO LS-40D/LS-40TD/LS-50TD PUMP — OPERATION AND PARTS MANUAL — REV. #11 (09/16/11)
LS-40D/LS-40TD/LS-50TD PUMP — OPERATING PROCEDURES
OPERATING PROCEDURES
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)
Safety glasses MUST be worn at
all times when operating the pump.
Failure follow safety guidelines can
result in
serious injury.
WARNING - SAFETY GLASSES
A well-planned location of the pump and
routing of the hose before starting a pour may
save subsequent moves throughout the job.
HOSE LUBRICATION
This procedure lubricates the hose and prevents separation
and blockages in the hose. Inspect the lines at all times to
prevent problems.
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).
The bentonite is not compatible with concrete.
DO NOT pump it into the forms discharge it
out of the formed area.
PRIMING THE PUMP WITH SLURRY MIXTURE
It is CRITICAL to the successful operation of a concrete
pump that the manifold and all delivery hoses, pipes and
elbows are coated with a film of lubrication BEFORE you
attempt to pump concrete.
Failure to properly prepare the pump and system will result
in a “dry pack” of concrete, blocking the shuttle valve tube
or delivery line.
1. Connect the entire delivery system to the pump, except
for the first hose. Pour 5 gallons of water into the second
hose and push in your clean out ball and reconnect.
This will help hold back the prime.
3. Mix the prime to the consistency of a smooth batter.
4. Position the first ready-mix truck at the hopper. Check
the concrete. DO NOT discharge concrete into hopper
at this time.
5. Pour approximately two 5 gallon buckets of prime into
the first hose and connect it to the pump.
2. There are several things you can use for the prime. A
few examples are Cement and lime at a 50/50 mixture,
slick pac, bentonite clay.
PRESSURE TEST
1. To determine the pressure of the Hydraulic System, set
the Cylinder Stroke Control switch (Figure 31) to the
JOG possition.
Figure 32. Manual Cylinder Jogging Switch
13. The Pumping Pressure Gauge
(Figure 33) should read
approximately 3200 ± 50 PSI.
Figure 33. Pumping
Pressure Gauge
2. Turn and hold the Manual Cylinder Jogging Switch
(Figure 32) to either JOG “A” or JOG “B” position to
test the pressure of that cylinder.
Figure 31. Manual Cylinder Jogging Switch