ST-45HRM CE CONCRETE PUMP— MAINTENANCE (PUMP)

ST45 PRESSURE SETTING SEQUENCE

To set maximum pump pressure:

1.With the engine turned “OFF”, loosen the 6.4 mm (1/4- inch) hydraulic hose attached to the compensator valve located on the top of the Main Delta Q Pump.

Figure 50. Compensator Valve

2.Loosen the jam nut located on the end of the compensator valve (Figure 50).

3.Turn the compensator adjustment nut (Figure 50) clockwise until tight.Tighten the 6.4 mm (1/4-inch) hose leading to the compensator.

4.Start the engine and loosen the jam nut located on the maximum relief valve cartridge (Figure 51).

5.Run the engine at maximum RPM (2,550) and turn the volume control knob counter-clockwiseto maximum volume position (Figure 51).

MAXIMUM RELIEF

VALVE CARTRIDGE

JAM NUT

MAIN

RELIEF VALVE

VOLUME

CONTROL

Figure 51. Hydraulic Drive Pump Manifold

6.On the control box, turn the pump control switch (Figure

22)and the test switch (Figure 31) to the “ON” position. Using an allen wrench, adjust the main relief valve (Figure

45)to 24.13 mPa (3,500 PSI). The reading can be taken from the pumping pressure gauge (Figure 52).

7.Hold the main relief valve adjusting bolt with a wrench and tighten the jam nut. Using the test switch, double check the pressure reading to make sure the setting has not changed.

Figure 52. Pumping Pressure Gauge

8.Turn the engine off and loosen the hose from the compensator valve. Loosen the jam nut and turn the compensator adjustment nut (Figure 50) counter- clockwise ½ turn. Tighten the 6.4 mm (1/4-inch) hydraulic hose.

9.Start engine and run at maximum RPM with volume control at maximum volume (fully counter-clockwise). Turn the pressure test switch (Figure 31) to the “ON” position. The pumping pressure gauge should now read 22.75 mPa (3300 PSI). It may be necessary to repeat the above steps to achieve the proper pressure settings. After the adjustment, make sure the compensator valve jam nut is locked tight.

MAYCO ST-45HRM CE PUMP — OPERATION & PARTS MANUAL — REV. #0 (02/23/04) — PAGE 53

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Multiquip ST-45HRM CE manual ST45 Pressure Setting Sequence, To set maximum pump pressure
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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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