ST-45HRM CE CONCRETE PUMP—TROUBLESHOOTING (ELECTRICAL

Practically all breakdowns can be prevented by proper handling and maintenance inspections, but in the event of a breakdown, please take a remedial action following the diagnosis based on the Electrical System Troubleshooting (Table 16) information shown below and on the proceeding page. If the problem cannot be remedied, please leave the unit just as it is and consult our company's business office or service plant.

TABLE 16. ELECTRICAL SYSTEM TROUBLESHOOTING

SYMPTOM

POSSIBLE PROBLEM

SOLUTION

 

 

 

 

 

If the hydraulic system is in a maximum pressure condition, pull

After completion of a pumping stroke,

 

the toggle on the emergency cycle switch (located inside the

Proximity switch is not emitting a radio

control box) towards you. If the pump cycles, replace the proximity

pumping pressure gauge indicates

frequency?

switch at the lubrication box. If the pump cycles when you push

high pressure and cycle stops.

 

the toggle down, replace the proximity switch on the towing end of

 

 

 

 

the pump.

 

 

 

 

 

Use a hot jumper wire. Connect (jumper wire) to terminals #35

Emergency cycle switch does not

Faulty K-4 relay?

and #36 on terminal block #1. When contact is made between

cycle pump

these two terminals and the pump cycles. This would indicate that

 

 

 

you have a faulty K-4 relay.

 

 

 

Starter switch is activated and pump

 

Check fuse box in control panel. Replace blown fuses.

Faulty fuses?

 

does not start

Check fuse link below engine solenoid, next to batter.

 

 

 

 

 

 

Hatz engine will not continue to run

D-1 diode has failed?

Check D1 diode in control box. Replace if needed with 6 amp

after key is released

diode P/N EGG5815 or equivalent.

 

 

 

 

Hatz engine will not start

No power to TB-5, conductor #3?

Check and replace K1 relay if necessary

 

No power to magnet valve start/stop?

 

 

 

 

 

Engine runs, but no current travels to

Faulty K-2 relay?

Check and replace K-2 relay if necessary

circuits #32-47

 

 

 

 

 

When pump is turned on, engine

K-6 relay not completing the circuit?

 

 

Check and replace K-6 relay if necessary

RPM's will not increase

Open circuit at TB1-24?

 

 

 

 

 

 

The pump will not reverse when

K-5 relay failure?

Check and replace K-5 relay if necessary

operated by remote control

 

 

 

 

 

Engine oil pressure light will not

Oil pressure sending unit failure?

Check and replace sending unit if necessary

de-activate

 

 

 

 

 

 

Faulty D-2 diode?

Replace with diode 1U404-C

Battery charge light wont de-activate

 

 

Alternator not charging battery?

Check and repair/replace alternator unit.

 

 

 

 

MAYCO ST-45HRM CE PUMP — OPERATION & PARTS MANUAL — REV. #0 (02/23/04) — PAGE 69

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Multiquip manual ST-45HRM CE Concrete PUMP-TROUBLESHOOTING Electrical, Electrical System Troubleshooting
Page 68 Page 70

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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