ST-45 PUMP — MAINTENANCE (PUMP)

SETTING PRESSURE INTHE ACCUMULATOR CIRCUIT

1.Attach a 3000 PSI test gauge (Mayco P/N 98016) to port G2 of the main manifold block (Figure 49).

3000 PSI

PRESSURE TEST GAUGE

P/N: 98016

4.Loosen the lock nut for the the accumulator circuit pilot relief valve cartridge (Figure 51), located at port G4.Using an allen wrench, turn the adjusting screw until pressure gauge reads 1950 PSI and tighten lock nut. Turn the engine off and on several times to make the pressure continues to read 1950 PSI.

PILOT RELIEF

ADJUSTMENTVALVE CARTRIDGE SCREW

LOCK NUT

Figure 51. Pilot Relief Valve Cartridge Adjustment

Figure 49. Accumulator Circuit PressureTest Gauge

2.Loosen the lock nut on the unloading valve cartridge (Figure 50) and using an allen wrench, turn the adjusting screw clockwise until it is completely closed.

5.Turn the unloading valve cartridge adjusting screw counter-clockwise until the pressure reaches 1750 PSI on the accumulator pressure gauge (Figure 29). Start and stop the pump several times to make sure the accumulator circuit pressure is holding at 1750 PSI.

6.Tighten the lock nut on the unloading valve cartridge.Your accumulator circuit pressure should now be properly adjusted.

ADJUSTMENT

SCREW

UNLOADING

VALVE CARTRIDGE

LOCK NUT

Figure 50. Unloading Valve Cartridge Adjustment

3.Turn the pump control switch (Figure 22) to the “ON” position and run engine at 2550 RPM.

MAYCO ST-45HRM PUMP — OPERATION & PARTS MANUAL — REV. #4 (07/16/04) — PAGE 49

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Image 49
Multiquip ST-45HRM manual Pilot Relief Valve Cartridge Adjustment

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.