ST-45 PUMP — OPERATING PROCEDURES

C.Mix the prime to the consistency of a smooth batter.

D.Position the first ready-mix truck at the hopper. Check the concrete.DO NOT discharge concrete into hopper at this time.

The bentonite is not compatible with

NOTE concrete. DO NOT pump it into the forms discharge it out of the formed area.

E.Pour approximately two 5 gallon buckets of prime into the first hose and connect it to the pump.

F.With the pump in FORWARD at 25-30 strokes per minute, slowly discharge the concrete from the ready- mix truck into the hopper and completely fill it.Keep the pump running continuously until concrete is discharging at the end of the delivery system. If the pump is stopped during this procedure, a blockage may occur.

G.If it is necessary to replace or add a section of delivery system, after the initial lubrication procedure, wet the inside area of the hose, pipe or elbow with 5 gallons of water per 25 foot length, before adding it to the system.

Clearing Concrete Blockage

13.Damaged hoses with internal restrictions can cause block- ages.

14.If a blockage occurs in a hose, walk the hose until you find thepointoftrouble.Thehosewillbesoftimmediatelypastthe blockage.If this happens at the start, disconnect the hose at the first coupling past the blockage.

15.Elevatethehoseatthatpointwiththeblockageareahanging down. Using a hammer, you can pound the down-stream edge of the packed area until it is free to flow.Shake all of the sandandgravelouttotheendofthehose.Beforereconnect- ing the hose, start the pump and run a small amount of concrete out to the end of the hose.This will assure that all of the separation is out of the hose.

CAUTION

Use extreme care! The hose line is under pressure and can cause serious injury.

16.The shuttle tube is plugged if volume at the discharge end of thehosestops,the hoseissoftandthehydraulicoilpressure gauge reads 3000 psi or more.

To clear a plug in the shuttle tube, great care must be taken as a dangerous condition will exist from pressure build-up inside the shuttle tube. (With the shuttle valve, the concrete can be pumped in reverse.) Use the following prodedures to clear the shuttle tubes.

WARNING

DO NOT open any of the delivery system joint clamps.

“Reverse” Pumping Procedure

A.Switch the pump into reverse. With pump speed at a medium-slow (approx. 12 strokes per min.) try to pull the “pack” back into the hopper with 5 or 6 reverse strokes.

B.Remix the concrete in the hopper.

C.Switch the pump into forward. If it is still plugged, repeat “Reversing” procedure three times.

If concrete still does not move, proceed to the Shuttle Tube Inspection Procedure.

Shuttle Tube Inspection Procedure

A. Stop the pump.Switch off the engine.

BThe senior or most experienced operator must warn all others to stand at least 20 feet away from the machine and turn their heads to face away from the pump.

CAUTION

Saftey glasses MUST be worn at all times when operating the ST-45. Failure to fol- low saftey guidlines can result in serious injury.

C.The operator will position themself beside the reducing elbow at the pump outlet. Wearing safety glasses, slip the end of a pry bar (24" length of reinforcing steel rod) under the latch of the hose clamp and flip it up.

PAGE 26 — MAYCO ST-45HRM PUMP — OPERATION & PARTS MANUAL — REV. #4 (07/16/04)

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Multiquip ST-45HRM manual Clearing Concrete Blockage, Reverse Pumping Procedure, Shuttle Tube Inspection Procedure
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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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