ST-45 PUMP — PUMP COMPONENTS

Figure 7 illustrates the location of the major components for the ST-45 Structural Concrete Pump. The function of each component is described below:

1. Tow Hitch Coupler – Requires a 2-inch ball hitch or a 3-inch pintle. Capable of towing 5,000 lbs.

2.Documentation Box – Contains engine and pump operation, parts and maintenance information.

3. Hydraulic OilTank/Cap– Remove cap to add hydraulic fluid. Fill with Shell Oil Tellus 68 or Mobil Oil DFE26 if level is low.

4.FuelTank/Cap – Fill with diesel fuel. Fuel tank (cell) holds approximately 20 gallons (88 liters). DO NOT top off fuel. Wipe up any spilled fuel immediately

5.Battery –This unit uses a +12 VDC type battery.ALWAYS use gloves and eye protection when handling the battery.

6.Heat Exchanger – Reduces temperature of the hydraulic oil.The exchanger draws oil from the hydraulic tank through a filter and into the heat exchanger before allowing it to flow into the hydraulic system.

7.Lubrication Box – This box is empty when shipped from the factory. Please fill with 7 gallons ( 26.5 liters) of SAE motor oil for first time use. Also check the dual clean-out point on bottom of lubrication box for a secure tight fit.

8.Tires — This trailer uses two ST205-750 x14C type tires. Tire inflation pressure is the most important factor in tire life. Pressure should be checked to 50 psi cold before operation. DO NOT bleed air from tires when they are hot. Check inflation pressure weekly during use to insure the maximum tire life and tread wear.

9.Shuttle Cylinder – Under pressure, the shuttle cylinder shears concrete passing from the concrete cylinder to the delivery line durring the cycle phase. The Accumulator provides the pressure needed to ensure enough force is provided during cycle.

10.Pump End Jack Stand – Use this jack stand to level and support the rear end of the pump. NEVER deploy on un-level ground and always check for firmness of ground.

11.Hopper/Hood – Lift hood to fill. Concrete from a Redi-Mix truck is poured into this hopper.The hopper can hold 10 cu. ft of concrete with optional forward/reverse mixer.NEVER put hands or any other parts of you body into the hopper.

12.Remixer Motor – Drives the remixer paddles inside the hopper. The motor direction is controled by the remixer control lever.

13.Lubrication Panel – This console allows for the remote lubrication of components on the pump.

14.Rear Running Lights – ALWAYS check and make sure both the right and left running lights are functioning correctly before towing the pump.

15. Accumulator – Stores hydraulic oil under pressure and releases it to the shuttle cylinder and provides the required pressure to activate the hydraulic system.

16. Remixer Control Lever – Controls the forward/reverse motion of the hopper remixer paddles.

17. Manifold – Aluminum block that controls the flow of hydraulic pressure to the various hydraulic motors and other components required to control the pump.

18. Hydraulic Pump – This unit incorporates an axial variable displacement hydraulic piston pump.

19. Throttle Control Knob – This is a variable speed type control. Turning the throttle lock (CCW) left unlocks the throttle allowing the throttle control cable to be pulled out to the desired position. Once the desired throttle position (speed) has been achieved, turning the throttle lock to the (CW) right locks it in place. Use the fine tune adjustment knob to fine tune the engine rpm's.

To place the engine in idle, press the top button inward all the way..

20. StrokeVolume Control Dial – Turns CW/CCW to increase or decrease the number of strokes per minute of the pump.

21. Control Box – Contains the mechanical and electrical components required to run the pump. See page 22 for components.

22. Tow End Jack Stand – Use this jack stand to level and support the tow end of the pump.

23. Pumping Pressure Gauge – Used to monitor pressure in the concrete cylinders and shuttle tube.

24. Accumulator Pressure Gauge– Used to monitor accumulator pressure. Pressure should read at least 1750 psi for correct pump operation.

25. Hydraulic Oil Sight Glass – Use to determine the amount of hydraulic oil remaining in tank. The sight glass also contains a temperature gauge for monitoring the temperature of the hydraulic oil.

26. Hopper Discharge Sleeve – Connect hoses or steel pipes to the discharge sleeve for pouring concrete.

MAYCO ST-45HRM PUMP — OPERATION & PARTS MANUAL — REV. #4 (07/16/04) — PAGE 21

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Multiquip ST-45HRM manual ST-45 Pump Pump Components
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ST-45HRM specifications

The Multiquip ST-45HRM is a highly versatile and robust soil compactor designed for various construction applications. With its advanced engineering and innovative technologies, it sets a new standard in the compaction equipment market. This model is particularly favored for its reliability, durability, and exceptional performance in both small-scale and large-scale projects.

One of the standout features of the ST-45HRM is its powerful engine. Equipped with a high-performance, fuel-efficient diesel engine, it delivers ample power while ensuring reduced fuel consumption. This results in not only lower operational costs but also decreased environmental impact, aligning with today's sustainability goals.

The compactor's dual-directional capability allows for efficient operation in compacting various soil types. Whether tackling granular, cohesive, or mixed soils, the ST-45HRM adapts seamlessly, ensuring optimal performance. Furthermore, it features a unique vibratory system that maximizes compaction efficiency, enabling faster job completion and minimizing the number of passes required.

Operator comfort and safety are paramount in the design of the ST-45HRM. The machine is equipped with an ergonomic operating platform and intuitive controls, allowing for easy maneuverability even in tight spaces. The advanced vibration dampening technology significantly reduces operator fatigue, making long hours of operation more manageable.

Additionally, the ST-45HRM offers impressive maneuverability, thanks to its compact size and precise control. This is particularly beneficial for working in confined areas, such as urban construction sites where space is limited. Its robust construction ensures it can withstand the rigors of challenging job sites while maintaining performance.

Maintenance is made simple with the ST-45HRM. The design allows for easy access to key components, reducing downtime and enhancing productivity. Regular service intervals and the use of quality materials ensure the longevity of the machine, making it a smart investment for contractors looking for reliable and efficient compaction equipment.

In summary, the Multiquip ST-45HRM combines powerful performance, innovative technology, comfort, and ease of maintenance into a single, versatile package. It is an ideal choice for contractors seeking a dependable soil compactor to meet the demands of various construction projects. With its impressive features and capabilities, the ST-45HRM stands out as a leader in the field of soil compaction.
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