ST-45HRM CE CONCRETE PUMP— OPERATING PROCEDURES

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 increase the engine speed to clear the blockage. Increasing the engine speed will only compound the problem.

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.

Pumping Tips

The effects of heat and excessive time on concrete:

7.Hot concrete, commonly referred to as a hot load, is concrete that has been in the redi-mix truck in excess of 2 to 3 hours. On a hot day, this amount of time is even less. A brief explanation of why heat and time affect concrete:

8.Concrete starts setting by drying up through a chemical reaction.Thecatalysttothisreactionisheat. Whenpumping a hot load, it is important to remember that when you have to stoppumpingforanyreason,addwatertotheconcreteinthe hopper and hand mix and move concrete in the hose every 5 minutes. If the shut down time becomes too long, wash out immediately.

Admixtures:

9.Remixtures that are designed into the concrete mix by the redi-mix company or an architectural engineering company. This section lists common admixtures and a brief explana- tion of their functions:

A.Pozzolith 300 – or the equivalent acts as a water retarderandalubricant.Onaleanmix,longpushes,stiff mixes, and vertical pushes, Pozzolith 300R helps pumpability.

B.MBVR – air entraining, acts as a lubricant.

C.Calcium Chloride – commonly referred to as C.C., is used as an accelerator. When pumping a load with calcium chloride, it is recommended that you wash out if the waiting time between delivery trucks becomes too long.

D.Super Plasticizers – acts as an accelerator.The concrete will look very wet after the super plasticizer is added, but will begin to set up very fast.Wash out immediately if you do not have a truck waiting. Super plasticizers are used mainly on commercial jobs.

E.Red Label – actsasawaterretarderandanaccelerator. Red label will be used mainly on commercial jobs.

F.Fly Ash – is used to help increase the strength of the concrete and decrease the cement content per yard. This is one of the most common admixtures used.

All admixtures will be shown on the

NOTE redi-mix concrete ticket.Before start- ing the pumping job, ask the driver of the redi-mix truck to see the concrete ticket and note the admixtures that exist and take the proper action.

10.Whenpumpinglongdistanceorpumpingstiffmixes,youcan expectadropinvolumecomparedtoshorterlinesandwetter mixes due to the change in valve efficiency or cavitation.

11.Leakingmanifoldseals orhose coupling gaskets which leak watercancauseseparationandsubsequentjammingatthat point.

Priming the Pump and Delivery System with Slurry

12.It is CRITICAL to the successful operation of a concrete pump that the manifold and all delivery hose, pipe 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.

A.With the entire delivery system connected to the pump. Except for the first hose. Pour 18.9 liters (5 gallons) of water into the second hose and push in your clean out ball and reconnect.This will help hold back the prime.

B.There are several things you can use for the prime. A few examples are Cement and lime at a 50/50 mixture, slick pac, bentonite clay.

MAYCO ST-45HRM CE PUMP — OPERATION & PARTS MANUAL — REV. #0 (02/23/04) — PAGE 25

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Multiquip ST-45HRM CE manual Pumping Tips, Admixtures, Priming the Pump and Delivery System with Slurry
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ST-45HRM CE specifications

The Multiquip ST-45HRM CE is a robust and versatile machine designed for a variety of heavy-duty applications, particularly in construction and industrial settings. Known for its durability and efficiency, the ST-45HRM CE stands out due to its combination of advanced technology, user-friendly features, and powerful performance, making it an ideal choice for professionals seeking reliable equipment.

One of the main features of the ST-45HRM CE is its powerful engine. It is equipped with a high-performance diesel engine that provides exceptional reliability and fuel efficiency. This engine allows the machine to achieve high-performance levels while minimizing operational costs, making it a cost-effective solution for various jobs. Additionally, the engine meets stringent environmental regulations, ensuring compliance with the latest emission standards.

The ST-45HRM CE is designed with operator comfort and safety in mind. One of its key characteristics is the spacious and ergonomically designed operator platform that allows for easy access and enhanced visibility. The controls are intuitively placed, providing excellent maneuverability and reducing operator fatigue during long working hours. Moreover, safety features such as emergency shut-off switches and protective enclosures are built into the design, ensuring a safer working environment.

In terms of technology, the ST-45HRM CE is equipped with advanced hydraulic systems that enhance its lifting capabilities. This machine is capable of lifting loads up to 45 tons, making it suitable for heavy materials and equipment. The hydraulic system is designed for smooth operation, allowing for precise control and optimal performance in various applications, including lifting, transportation, and heavy-duty towing.

Maintenance is another consideration where the ST-45HRM CE excels. It features easy access points for routine checks and repairs, reducing downtime and operational costs associated with maintenance. The components are engineered for longevity, ensuring that the machine can withstand the rigors of continuous use in demanding environments.

Overall, the Multiquip ST-45HRM CE is a standout in its category, boasting an exceptional blend of power, efficiency, and user-centric design. With its advanced features, safety technologies, and ease of maintenance, it is ideal for professionals in construction, industrial lifting, and other heavy-duty applications, providing a reliable solution to meet their needs.
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