ST-45 PUMP — TROUBLESHOOTING (ENGINE)

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 Engine Troubleshooting (Table 9) 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 9. ENGINE TROUBLESHOOTING

SYMPTOM

POSSIBLE PROBLEM

SOLUTION

 

 

 

 

Speed control lever is in "STOP" position?

Set speed control lever to "START" position.

 

 

 

 

No fuel reaching injection pump?

Add fuel. Check entire fuel system.

 

 

 

 

Defective fuel pump?

Replace fuel pump.

 

 

 

 

Fuel filter clogged?

Replace fuel filter and clean tank.

 

 

 

Engine will not start or start is

Faulty fuel supply line?

Replace or repair fuel line.

 

 

delayed, although engine can

Compression too low?

Check piston, cylinder and valves. Adjust or

be turned over.

repair per engine repair manual.

 

 

 

 

 

Fuel injector not working correctly?

Repair or replace injector in accordance with

 

engine repair manual.

 

 

 

 

 

 

Oil pressure too low?

Check engine oil pressure.

 

 

 

 

Low starting temperature limit exceeded

Comply with cold starting instructions and

 

proper oil viscosity.

 

 

 

 

 

 

 

Check whether clear (not turbid) fuel emerges

 

 

from the fuel line (detach from injection

 

Fuel separates has inadequate resistance to

pump). If the fuel is turbid or separated, warm

At low temperatures engine will

low temperatures?

up the engine or drain the complete fuel

 

supply system. Refuel with winter grade diesel

not start.

 

 

fuel.

 

 

 

 

 

 

Engine oil too thick?

Refill engine crankcase with correct type of oil

 

for winter environment.

 

 

 

 

 

 

Throttle lever in STOP position?

Reposition throttle lever to RUN position.

Engine fires but stops soon as

 

 

Fuel filter blocked?

Replace fuel filter.

starter is switched off.

 

 

 

Fuel supply blocked?

Check the entire fuel system.

 

 

 

Engine stops by itself during

Fuel tank empty?

Add fuel.

 

 

normal operation.

Fuel filter blocked?

Replace fuel filter.

 

 

 

 

 

Fuel tank empty?

Replace fuel filter.

 

 

 

 

Fuel filter clogged?

Replace fuel filter.

 

 

 

Low engine power, output and

Fuel tank venting is inadequate?

Ensure that tank is adequately vented.

speed.

 

 

Speed control lever does not remain in

See engine manual for corrective action.

 

 

selected position?

 

 

 

 

 

Engine oil level too full?

Correct engine oil level?

 

 

 

Low engine power output and

Air filter blocked?

Clean or replace air filter.

 

 

 

 

low speed, black exhaust

Incorrect valve clearances?

Adjust valves per engine specification.

smoke.

 

 

Malfunction at injector?

See engine manual.

 

 

 

 

MAYCO ST-45HRM PUMP — OPERATION & PARTS MANUAL — REV. #4 (07/16/04) — PAGE 61

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Multiquip ST-45HRM manual ST-45 Pump Troubleshooting Engine, Engine Troubleshooting
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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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