30HD Operating Information | Multiquip C-30HD guide

OPERATING SUGGESTIONS

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

2.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). This procedure lubricates the hose and prevents separation and blockages in the hose. Note: 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)

3.It is important that once the slurry procedure is completed, and you have started concrete 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 at the start is if a blockage occurs.

4.When the pump is stopped for any reason during a pour; e.g., moving hose, waiting for redi-mix truck, the following suggestions are offered:

A. Leave the hopper full of concrete at the time of shutdown. It is important not to let the redi-mix driver wash too much water into the hopper, as this could cause separation of the concrete in the hopper.

B. If the shutdown period exceeds 2 to 3 minutes, turn off the engine so the vibration does not separate the mix in the hopper which can cause a blockage in the manifold when the pump is started.

C. If it is necessary to wait 10 minutes or more for another load of concrete, it is wise to start the pump and pump 6 or 8 strokes every 5 minutes to prevent setting of the mix in the system. If waiting time is excessive, it would be wise to wash out the pump and hoses and start over when the new truck arrives.

D.When pumping stiff mixes and there is waiting time between redi-mix trucks, it is advisable to add some water to the last hopper of material and “hand mix” to ensure an easier start with the following load.

C-30HD OPERATING INFORMATION

E. When the pumping job requires a stiffer mix, the following method is suggested for starting: Take a water hose with a nozzle on it and apply water with a fine spray to the concrete as it comes down the redi-mix chute into the pump hopper after the slurry procedure is completed and you are ready to start pumping. Using this procedure will make it easier to pump through the clean hose. Note: Once the concrete has reached the end of the hose, do not apply any more water in this manner as this procedure is used on the start only.

F. Hose sizing is very important: We strongly recommend on harsh mixes, vertical pushes, stiff concrete, shotcrete, long pushes, that a 2 1/2” line be used as far as possible. The advantages of using the 2 1/2” line are improved pumpability, less pumping pressure and less wear on the pump.

5.Following the pump operation, proper wash out of all materials or “build-up” within the pump manifold and hoses will prevent problems when starting the next job.

6.A thorough inspection of the drive components and greasing of all bearings after each job will ensure adequate lubrication and service to the pump which is normally operating in wet, gritty conditions. Note: Over-greasing any bearing on your Mayco pump will not damage the bearing.

7.Warning: Common sense tells us that if you drive a truck into a brick wall, something is going to be damaged.The same holds true with your concrete pump. If you repeatedly

pull the throttle all the way out and try to force your pump to push through blockages due to separation of material in the hose or manifold, you will soon have breakdowns and costly repairs which are not covered under warranty. If a blockage occurs, find where it is and clear it before further pumping. Do not use horse-power; it will only make it worse.

8.Warning: It will be necessary at times to move your pump from one job site location to another. Before moving the pump, make sure to pump the remaining concrete out of the hopper. Moving the pump with a full

hopper of concrete can cause severe damage or breakage of the axle and axle springs, excess strain and pressure on the hub and bearing assembly.

PAGE 14 — C-30HD — PARTS & OPERATION MANUAL — REV. #4 (03/06/01)

C-30HD specifications

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