The Mayco concrete pump has one main pumping piston which is valved by means of two ball checks. (A inlet, and B outlet.)

The secondary piston is used as a compensator piston to smooth out the pulsations of a single piston action. Note: The compensator will not start operating until material is pumped into the line and back pressure develops.

The compensator spring, which is installed on the compensator piston rod, deflects with each piston stroke.This “spring cushion”, in conjunction with the cam profile, produces and uninterrupted smooth flow of material under average pumping conditions.

An automatic, centrifugal clutch is installed to engage and disengage the pumping action without stopping or starting the engine. The centrifugal clutch is set at 1100 R.P.M. release. The engine idle speed is approximately 750 R.P.M.; therefore, the clutch is completely disengaged at idle.The throttle settings while pumping should always maintain an engine R.P.M. high enough to prevent the clutch from slipping and burning the clutch lining.

C-30HD — HOW IT WORKS

The return spring which is installed on the rocker arm, is installed to eliminate shock and stress between the cam roller and the cam weldment when the pump is in operation. If the return spring is removed or replaced for any reason, maintain the backing plate dimension of 3” as shown on Figure 3, to produce the proper pre-loading of the spring for a smooth performance.

Figure 1- The pumping cylinder retracts drawing the material past the ball (A) and filling the cylinder.The compensator piston is pumping the material out to the nozzle and causing ball (B) to seat preventing the material from returning to the pumping cylinder intake.

Figure 2- The pumping piston is forcing the material past ball

(B)and out to the nozzle, also seating ball A so that the material will not flow back to the hopper. This action also fills the compensating piston for the next stroke.

Figure 3- Shows the relationship between the return spring, the compensator spring and the rocker arm to maintain a smooth performance. Do not tighten the bolt (Item 1) completely, the rod end must be able to move.

PAGE 12 — C-30HD — PARTS & OPERATION MANUAL — REV. #4 (03/06/01)

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Multiquip C-30HD operation manual 30HD HOW IT Works, Pumping piston is forcing the material past ball
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C-30HD specifications

The Multiquip C-30HD is a powerful and versatile concrete saw designed for a variety of cutting applications. This robust machine is particularly well-suited for heavy-duty tasks, making it a favorite among contractors and construction professionals. With a focus on performance, ease of use, and durability, the C-30HD stands out in the competitive market of concrete cutting equipment.

One of the standout features of the C-30HD is its engine. Powered by a reliable Honda GX390 gasoline engine, it delivers impressive power and ensures smooth operation during cutting tasks. The engine is designed for fuel efficiency and ease of maintenance, allowing users to minimize downtime and extend the saw's lifespan.

The C-30HD also comes equipped with a heavy-duty, adjustable frame that provides stability and precision during operation. This adjustable frame allows for depth control, enabling operators to cut to various depths depending on the requirements of the job. Its ergonomic design ensures comfortable handling, which is crucial when working on large or extended projects.

In terms of cutting capabilities, the C-30HD features a 30-inch blade capacity, allowing it to tackle substantial concrete slabs with ease. It accommodates various blade types, enabling versatility in cutting different materials like asphalt or brick. The saw is also designed with a water delivery system that helps minimize dust and cooling the blade, improving cutting efficiency and prolonging blade life.

Technologically, the C-30HD integrates advanced safety features to enhance user protection. This includes a blade guard that shields operators from potential hazards during operation. Additionally, the saw's controls are intuitively located for easy access, promoting safe operation and reducing the risk of accidents.

Another noteworthy characteristic of the C-30HD is its transportability. Equipped with sturdy wheels, this concrete saw can be easily moved around job sites, enhancing productivity and flexibility. Coupled with its rugged construction, the C-30HD is built to withstand the demands of tough working environments, ensuring longevity and reliable performance.

In summary, the Multiquip C-30HD concrete saw combines powerful performance, innovative features, and robust design. It meets the needs of professionals in the construction industry seeking high-quality concrete cutting solutions. With its remarkable engine, adjustable frame, and safety technologies, the C-30HD is a top choice for heavy-duty cutting tasks. Whether tackling large projects or intricate cuts, operators can trust the reliability and efficiency of the C-30HD to get the job done.
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