Multiquip LS600P operation manual Hose Lubrication, Priming The Pump With Slurry Mixture, Pumping

operation

Hose Lubrication

Before pumping, it is necessary to lubricate the hose.

This procedure 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).

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.

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. Pour 5 gallons of water and a bag of raw cement into the hopper.

2.Place the direction control switch to the REVERSE position (Figure 26).This will mix the water and cement into slurry.

FORWARD REVERSE

Figure 26. Direction Control Switch (REVERSE)

3.Mix the slurry 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.Place the direction control switch in the FORWARD position.This will start the flow of the slurry to the hoses.

6.Keep the slurry flowing until most of it is pumped out. However, make sure that some slurry is left on the hopper when concrete is first discharged from the ready-mix truck.

Pumping

WARNING

Safety glasses and hearing protection MUST be worn at all times when operating the pump. Failure to follow safety guidelines can result in serious injury.

NOTICE

A well-planned location of the pump and routing of the hose before starting a pour may save subsequent moves throughout the job.

1.Place the pumping control switch in the LOCAL position (Figure 27) for normal pumping operation.

LOCAL REMOTE

CENTER

OFF

Figure 27. Pumping Control Switch (Local)

2.Holding the volume control switch (Figure 28) to the right will increase pumping volume to approximately 10 strokes per minute. Holding the volume control switch to the left will decrease pumping volume.

_ +

DECREASE INCREASE

VOLUMEVOLUME

Figure 28. Volume Control Switch

3.A thumping sound (cylinder stroke) should be heard. The thumping sound represents the number of strokes per minute (volume) of the pump.

page 34 — MAYCO LS600P CONCRETE PUMP • operation manual — rev. #0 (05/13/13)