Cleaning & Maintenance Cleaning Machines

High pressure jets

Operators, when using the cleaning machine that use water make common mistakes which can turn hazardous at times.

Power connection

In cases where the machine is attached to the power cable, operators may overlook the voltage indicated on the type plate which must correspond to the voltage of the electrical source. Incorrect voltage will damage the machine. The power cord must be checked regularly for damages, such as cracks or ageing. If damage is found, the cable must be replaced before further use. But operators continue to use the machine even if the power cords are damaged. Arrange to immediately replace the power cord by an authorized customer service or a skilled electrician.

Make sure that the power cord or extension cables are not damaged by running over, pinching, dragging or similar such action. Protect the cable from heat, oil, and sharp edges. In addition, never touch the mains plug with wet hands. If the extension cable is used, operators must protect it against from the spraying water. The connection must not lie in water.

Application

High-pressure jets can be dangerous if improperly used. The jet may not be directed at persons, animals, live electrical equipment or at the appliance itself. The appliance may only be used by persons who have been instructed in handling the appliance or have proven qualification and expertise in operating the appliance or have been explicitly assigned the task of handling the appliance.

The appliance must be checked for the power connection line and for important parts like safety devices, high pressure hose and spray guns. Operators have to refrain from using the machine if the appliances are damaged. Acetone, undiluted acids and solvents are aggressive towards the materials from which the appliance is made. Never draw in fluids containing solvents or undiluted acids and solvents!

This includes petrol, paint thinner and heating oil. The spray mist thus generated is highly inflammable, explosive and poisonous. High pressure jet machines have varied applications and can be easily taken around by the operators. While cleaning at filling stations, if the appliance is used without the corresponding safety provisions it could turn hazardous. Further, the appliance must be sitting on an even and stable ground for better performance. Safety measures like protecting all the current-conducting parts in the working area against jet water, wearing appropriate protective clothing to protect self, etc., should be adhered to. Operators have to adjust the spray as per the application: vehicle tyres/tyre valves may be cleaned only with a minimum spray distance of 30cm. Otherwise, the high pressure spray can cause damage to the vehicle tyre/tyre valve. The discolouring of the tyre is the first sign of damage. Damaged vehicle tyres are a source of danger.

Again spraying materials containing asbestos or other substances could be hazardous. Operators should use only those detergents approved by the manufacturer of the appliance and also in the right dilution proportion. The use of other detergents or chemicals may compromise the safety of the appliance. If the detergent comes in contact with the eyes, please rinse the eyes thoroughly with water and consult a doctor immediately if the detergent has been swallowed.

Just because something is not right, the operator should refrain from opening the hood when the motor is running. Let the hoses cool off after hot water operation or operate the appliance briefly using cold water. There is a recoil pressure arising from the water jet that comes out from the spray pipe. The angular spray pipe brings about an upward force. Hold the gun and the spray pipe tightly. The recoil and bending forces may be different if you are using angular spray devices. In petrol engine appliances, ensure that no petrol comes in contact with hot surfaces. Ensure that there is adequate ventilation or provision for diverting the exhaust gas while operating the appliance in closed rooms (risk of poisoning).

Maintenance

Switch off the appliance and, in case of appliances connected to the mains, pull out the power cord before cleaning and performing any maintenance tasks on the machine. Maintenance work may only be carried out by approved customer service outlets or experts in this field who are familiar with the respective safety regulations. Do not clean the appliance with a water hose or high-pressure water jet (danger of short circuits or other damage). Do not operate the appliance at temperatures below 0°C.

Thorsten Möwes