Multiquip LS-300P - Manual (Page 35)

MAYCO LS300P CONCRETE PUMP • OPERATION MANUAL — REV. #0 (06/09/14) — PAGE 35
3. A thumping sound (cylinder stroke) should be heard.
The thumping sound represents the number of strokes
per minute (volume) of the pump.
4. Scroll through the digital readout screen with the
scroll switch to go to screen 7 (Figure 28). This screen
will show the volume in strokes per minute.
Figure 28. Strokes Per Minute Display
5. Let the pump cycle until the hydraulic oil temperature
(Figure 29) is approximately 50° to 60° F.
Figure 29. Hydraulic Oil Temperature Gauge
6. Rotate the Volume Control Knob (Figure 27) to the right
to increase the volume to 25-30 strokes per minute.
Place pump control switch in the center “ OFF” position.
Slowly discharge the concrete from the ready-mix truck
into the hopper and completely fill it.
Place pump control switch in the local “
ON” pumping
position. Keep the pump running continuously until
concrete is discharging at the end of the delivery
system. If the pumping operation suddenly stops with
no concrete discharging from the hose, a blockage
may have occurred. Immediately place the switch in the
“ OFF” position. Refer to Clearing Concrete Blockage
Section.
THROTTLE ON
STROKES: 100
STROKES/MIN 10.0
YDS/HR 0.0
7
HYDRAULIC OIL
TEMPERATURE
7. It is important that once the slurry procedure is
completed, and concrete is 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 during the priming
procedure is if a blockage occurs.
8. If it is necessary to replace or add a section of delivery
system, after the initial lubrication procedure, wet the
inside area of the hose, pipe or elbow with 5 gallons of
water per 25 foot length, before adding it to the system.
CAUTION
HOSE/LINE BLOCKAGE
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.
NOTICE
When pumping long distance or pumping stiff mixes, you
can expect a drop in volume compared to shorter lines
and wetter mixes due to the change in valve efficiency
or cavitation.
OPERATION