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

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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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Contents Concrete Pump Model C-30HD Page Heres HOW to GET Help 30HD Parts Ordering Procedures UPS Ground Service at no charge for freightDimensions PerformanceMechanical Drive Models Hydraulic Drive ModelsSafety Instructions Important Hand Signals General Information Pump MIX GuidelinesSample Design MIX Page 30HD HOW IT Works Pumping piston is forcing the material past ball30HD HOW IT Works 30HD Operating Information Operating SuggestionsPumpingtips Andtrouble Shooting Follow these instructions carefullyWhen pumping vertically Clean UP Procedure Part a Always think safety first Part BConcrete MIX DESIGNS-SCREEN ANALYSIS- Terminology DefinitionsDeficiencies in Sieve Analysis of Aggregates Concrete MIX Information Sieve analysis-percent passingT.M. Standard Specification for Grading Aggregate 2708 27752685 2749Slumptest Procedure Explanation of Code in Remarks Column Items Found In the Items Number Column30HD Suggested Spare Parts 30HD Control Panel STARTER-push in to start enginePage 30HD Frame 30HD Concrete Pump Frame 30HD Gasoline Engine Control Positive Cable 30HD Diesel Engine Control 30HD Concrete Pump Diesel Engine CONTROL-C-30HD Page 30HD Manifold Assembly 30HD Concrete Delivery Replaces EM407 30HD Clutch Assembly ALL Machines Priorto S/N 960801 August Page 30HD Crankshaft Assembly 30HD Concrete Pump Crankshaft Assembly 156 SCREW, SET Half DOG Point 3/8-16X3/4 30HD Counter Shaft Assembly 30HD Counter Shaft Assembly Counter Shaft30HD Compensator Piston ROD 30HD Compensator Piston ROD 30HD Connecting ROD Assembly 20328 OLD Style 30HD Connecting ROD Assembly 20328 OLD Style 30HD Connecting ROD Assembly 20328T NEW Style 30HD Connecting ROD Assembly 20328T NEW Style 30HD Rocker Assembly 30HD Concrete Pump Rocker Assemblies 30HD Compensating Spring Assembly 30HD Return Spring Assembly EM1480530HD OIL System and Fuel System 30HD OIL System and Fuel System Fitting Location and Plastic Hose Length Position LocationPage 30HD Axle Installation 30HD Concrete Pump Axle Installation 30HD Hopper and Hood 30HD Hopper and Hood 30MG Scaled Down MANIFOLD/CYLINDER KIT Model C-30MG Page 30MG Manifold Assembly C-30MG 30MG Manifold Assembly C-30MG 30MG Piston Head Components 30MG Piston Head Components 30SP Optional Screw Conveyor Andtorque Limiter Model C30-SP Screw Feeder Recommemded Shotcrete System S/J Coupling General recommendations30HD Shotcrete Accessories 30HD Concrete Pump Shotcrete Accessories 30HD Service Procedures Ball and Seat Replacement ProcedureClutch Lining Replacement for EM14320 Clutch Assembly only Preventive MaintenanceJolter Spring No Longer Available Adjustment EM20714 EM2071530HD Service Information Remote Control 30HD Remote Control Schematic 30HD Remote Control Schematic Obsolete Tighten jam-nut to prevent eye bolt from unscrewing30HD Service Informationtorque Limiter Model C30-SP only Overload Safety Device Installed on Screw Conveyor Shaft30HD Service Information Bearing Installation EM104 EM20364 EM20333 EM20816Illustration represents the oil pressurized system oil pump 30HD Service Information Return Spring Adjustment Procedure 30HD Service Information Belt and Chain Adjustment Installation and Drive Alignment Working LoadsLubrication Installation of Coversides Installation of Spring Locks and CotterpinsWhen Installing Chain Drives on Equipment Pin RemovalTerms and Conditions of Sale Parts Multiquip INC

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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