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 sug- gested 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).
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.
PRIMINGTHEPUMPWITHSLURRYMIXTURE
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 25).This will mix the water and cement into slurry.
FORWARD 
REVERSE
Figure 25. Direction Control Switch (REVERSE)
3.Mix the slurry to the consistency of a smooth batter.
4.Position the first
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.
LS600 PUMP — OPERATION
PUMPING
WARNING - SAFETY GLASSES
Safety glasses MUST be worn at all times when operating the pump. Failure to follow safety guidelines can result in serious injury.
A
1.Place the Pumping Control Switch to the LOCAL position (Figure 26) for normal pumping operation.
LOCAL
REMOTE
CENTER
OFF
Figure 26. Pumping Control Switch (LOCAL)
2.Slide the Volume Control Switch (Figure 27) to the right to increase the volume to approximately 10 strokes per minute. Sliding the volume control to the left will decrease pump volume.
_ +
DECREASE 
INCREASE
VOLUMEVOLUME
Figure 27. Volume Control
A thumping sound (cylinder stroke) should be heard. The thumping sound represents the number of strokes per minute (volume) of the pump.
3.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.
THROTTLE ON 7
STROKES: 100
STROKES/MIN 10.0
YDS/HR 0.0
Figure 28. Strokes Per Minute Display
PAGE 28 — MAYCO LS600 PUMP — OPERATION AND PARTS MANUAL — REV. #4 (9/15/11)
