1. Do Not Operate the Boom When Wind Speed Exceeds Level 6

A concrete boom pump truck should not use the placing boom for concrete distribution when wind speed exceeds Level 6.

Because the boom is extremely long and heavy, strong wind creates a large wind load that affects the stability of the entire machine.

Operating the boom in strong winds can easily cause:

• Concrete pump truck overturning

• Boom instability

• Serious equipment damage

• Operator injuries

Always check weather conditions before starting boom operations.

2. Never Connect Vertical Pipes Directly to the Pump Outlet

The vertical delivery pipeline should not be directly connected to the concrete pump outlet.

Correct installation requirements:

• A horizontal pipe section of at least 10 meters should be installed before the vertical pipeline.

• A check valve should be installed on the horizontal pipe close to the pump outlet.

This design helps reduce pressure impact and prevents concrete backflow, improving pumping safety and pipeline reliability.

3. Keep the Pump Truck Away from Excavation Edges

The concrete pump truck must maintain a safe distance from foundation pits, trenches, and excavation edges.

Many overturning accidents are caused by unstable ground conditions.

During pumping operations:

• The outriggers generate extremely high pressure on the ground.

• Soft soil or ground collapse may cause the supports to sink.

• Uneven support can result in pump truck overturning.

Always ensure the ground is strong, flat, and capable of supporting the machine.

4. Clean the Hopper Before Pumping

Before starting concrete pumping, the mixing hopper must be cleaned and free of foreign materials.

Debris inside the hopper can cause:

• Concrete blockage

• Pumping system failure

• Pipeline blockage

• Difficult maintenance work

Experienced operators understand that a blocked concrete pipeline is one of the most troublesome problems during pumping operations.

5. Do Not Move the Truck When the Boom Is Fully Extended

When the placing boom is fully extended and the outriggers are supporting the machine, do not move the pump truck chassis.

Safety requirements:

• Never move the vehicle with the boom extended.

• Do not install delivery pipes larger than the specified diameter.

• Safety ropes must be installed on connected end hoses.

Incorrect operation may cause boom damage or serious accidents.

6. Fully Extend and Secure All Outriggers Before Operation

All outriggers must be fully extended and properly supported before operating the boom.

A concrete pump truck with unstable or improperly supported outriggers must never perform boom movements.

Proper outrigger installation is one of the most important safety steps for preventing overturning accidents.

7. Never Use the Boom as a Crane

A concrete pump truck is not a lifting machine.

The boom must never be used to:

• Lift heavy objects

• Pull equipment

• Move construction materials

Although some operators may have attempted this method, it is extremely dangerous.

Excessive loading can cause:

• Boom structure damage

• Boom fracture

• Machine overturning

• Fatal accidents

Always use proper lifting equipment for lifting operations.

8. Never Open Concrete Pipes or Hydraulic Lines Under Pressure

During pumping operation, or when the system pressure has not been fully released, never open any concrete delivery pipeline or hydraulic oil pipe.

Do not dismantle hydraulic valves or components while the system is pressurized.

High-pressure concrete and hydraulic oil can spray out with extreme force and may cause serious injuries.

Before maintenance:

• Stop pumping

• Release system pressure completely

• Confirm safety before inspection

9. Clean All Concrete After Pumping Operation

After completing pumping work, all remaining concrete inside the hopper and delivery pipeline must be completely removed.

Cleaning procedures should include:

• Cleaning the concrete hopper

• Flushing the delivery pipeline

• Cleaning the concrete pump system

• Checking pipeline condition

Proper cleaning prevents:

• Concrete hardening inside pipes

• Pipeline blockage

• Equipment damage

• Reduced service life

10. Do Not Use Compressed Air to Clean Boom Pipelines

Compressed air should never be used to clean the boom delivery pipeline.

The high pressure generated by compressed air can create dangerous situations.

When folding the boom:

• Follow the correct folding sequence.

• Operate according to the specific pump truck model.

• Always follow the manufacturer's operating instructions.

Different concrete pump truck designs may require different boom folding procedures.