Multiquip LS600P ユーザーズマニュアル

1.  Switch the pump into reverse.  With pump speed at a 

medium-slow (approx. 12 strokes per min.) try to pull 

the “pack” back into the hopper with 5 or 6 reverse 

strokes. 

2.  Remix the concrete in the hopper.
3.  Switch the pump into forward. If it is still plugged, repeat 

“Reversing” procedure three times. 

4.  If concrete still does not move, proceed to the Shuttle 

Tube Inspection Procedure.

1.  Stop the pump. Turn off the engine.
2.  The senior or most experienced operator must warn all 

others to stand at least 20 feet away from the machine 

and turn their heads to face away from the pump.

3.  The operator will position himself beside the reducing 

elbow at the pump outlet.  Wearing safety glasses, slip 

the end of a pry bar (24" length of reinforcing steel rod) 

under the latch of the hose clamp and flip it up.

4.  Carefully knock the end of the hose away from the 

reducer.

5.  Chip the concrete out of the reducer with the pry bar. 

Make sure the accumulator pressure 

gauge reads 

ZERO psi. prior to 

performing any maintenance or 

inspection.You must follow lock 

out-tag out procedures. Improper 

accumulator pressure can result in 

an explosion causing serious injury 

or 

death.

6.  Remove the reducer.  From the discharge end, chip 

the concrete out of the shuttle tube with the pry-bar. 

If concrete cannot be loosened from the outlet of the 

shuttle tube, remove the clean-out plug on the bottom 

of the hopper to discharge the concrete.

7.  Chip the blockage out with the pry-bar.
8.  Flush the shuttle tube with water.
9.  Before resuming operation of the pump, perform the 

“Reverse” Pumping Procedure to relieve pressure on 

the shuttle tubes.