Major malfunctions and repair of motor pumps

A motor pump is a surface pumping device that is widely used in various branches of human life and activities. On the shelves of modern specialized stores, you can see a large number of these devices, which differ not only in price and country of manufacture, but also in purpose. Buying a motor pump is an expensive financial investment. Before going to the store, it is imperative to consult with specialists and study the advantages and disadvantages of each model, so that the purchased product does not disappoint with low quality and does not turn out to be useless. The service life of a motor pump is influenced not only by the model and build quality, but also by proper operation and proper care.

A motor pump is a simple device that consists of two parts:

• internal combustion engine;
• pumping part.

Experts identify several types of breakdowns in gasoline, electric and gas appliances and the reasons for their occurrence.

• Inability to start the engine (for example, 2SD-M1). Possible reasons: lack of fuel in the tank, low oil level in the engine, incorrect position of the device, presence of oil in the combustion chamber after improper transportation, opening of the carburetor damper of a cold engine, no spark between the electrodes during rotation of the engine shaft, clogging of the filter device, closed feed valve fuel.
• Interruptions during work. Causes: contamination of the air filter, breakdown of the rotor speed regulator, deformation of the valve seat, use of poor quality fuel, wear of the gasket, deformation of the exhaust valve parts.
• Overheating of the engine. Reasons: incorrectly set engine operating parameters, using inappropriate fuel, performing work at an altitude of more than 2000 m, operating in unsuitable climatic conditions.
• No water entering the pump. Reasons: lack of water in the pump, air flow into the intake hose, loose fixation of the filler plug, air passage under the sealing gland.
• Low volume of pumped water. Causes: air intake at the inlet, contamination of the intake filter, inconsistency between the diameter and length of the hose, overlapping or clogging of the intake taps, finding the water mirror at the maximum height level.

• Breakdown of the time relay and protection system. Reasons: contamination of the internal system of the pumping device, work without oil flow.
• The presence of extraneous noise. The reason is the deformation of the internal parts.
• Automatic shutdown of the device. Causes: the occurrence of an overload in the system, violation of the integrity of the engine, soil ingress.
• Breakage of the magnet in the vibration device.
• Breakdown of starting condensate.
• Heating of the working fluid.

If the motor pump does not start, stalls under load, does not pump or pump water, does not start, you must carefully remove the impeller, disassemble and adjust it. For each type of breakdown, there is an individual solution to the problem. If it is impossible to start the motor pump, the following measures must be taken:

• fuel filling in strict accordance with the manufacturer's instructions;
• checking the filling level with a dipstick and, if necessary, carrying out additional fuel filling;
• horizontal placement of the device;
• checking the operation of the engine shaft using the starter cord;
• cleaning the carburetor float chamber;
• removal of impurities in the fuel supply filter;
• full closure of the carburetor flap;
• removing carbon deposits from the spark plug;
• installation of a new candle;
• opening the fuel supply valve;
• cleaning of filtering devices by unscrewing the bottom plug on the float chamber.

If there are interruptions in the operation of the device, you need to carry out the following manipulations:

• cleaning the filter and all approaches to it;
• installation of new filter parts and snails;
• determination of the nominal value of the rotor speed;
• increase in compressor pressure.

In case of severe overheating of the engine, it is imperative to perform several actions:

• engine adjustment;
• observance of the temperature regime of the environment during the operation of the device.

Often, when performing work, the motor pump stops sucking in liquid and pumping water. In the event of this problem, there is an established sequence of actions:

• adding water to the pumping section;
• tight closing of the filler plug;
• replacement of seals and oil seal;
• replacement of the suction hose;
• sealing of places of penetration of air flows.

Many owners of motor pumps over time notice a decrease in the volume of pumped liquid and a sharp drop in the performance of the device. Elimination of this breakdown consists of several manipulations:

• checking the connection of the intake hose to the pumping equipment;
• fixing the fastening clamps on the branch pipe;
• flushing of filter parts;
• connection of a hose of the appropriate diameter and length;
• moving the installation to the water mirror.

To eliminate the breakdown of the time relay, it is enough to clean the internal equipment of contaminants, add the missing volume of oil and check the integrity of all parts. To resume the silent operation of the motor pump, it is necessary to check the absence of mechanical damage and various defects in component parts. Only the electricians of the service center can fix the breakdown associated with the disconnection of the device. Before calling a specialist, you can only check the junction box for the possibility of a voltage drop and remove visible soil particles inside the apparatus.

After purchasing the necessary equipment, professional craftsmen recommend that you first carefully study the manufacturer's instructions and the rules for operating the motor pump, which consist of several positions:

• control of the structure of the pumped liquid to prevent clogging of pumping equipment;
• regular checking of the tightness of all parts;
• compliance with the time range of operation of the device, depending on its type;
• timely filling of fuel into the fuel tank;
• constant monitoring of the oil level;
• timely replacement of filtering devices, oil and spark plugs;
• battery capacity check.

It is strictly forbidden to carry out the following list of activities:

• pumping an unintended type of liquid;
• the use of low-quality fuel and its filling into a working apparatus;
• operation without all the necessary filtering components;
• disassembly and repair without the necessary practical skills.

Experts recommend annually carrying out a number of preventive measures that will prevent the occurrence of different types of breakdowns:

• regular removal of debris and dirt;
• checking the tightness of piston components;
• checking the cylinder and piston ring;
• carbon deposits removal;
• repair of support bearing separators;
• diagnostics of the water pump.

In case of malfunctions in the operation of the motor pump, you must immediately begin to solve the problem that has arisen. The owners of the device can eliminate most of the tasks on their own, but there are a number of problems that should be solved only by specialists of service centers. The most demanded services of repair organizations are oil changes, checking the operation of spark plugs and installing new ones, replacing drive belts, sharpening chains, changing various filters and a general technical inspection of the device. Ignoring even minor malfunctions can lead to serious malfunctions and even breakdown of the entire device, which will require significant financial costs to restore, sometimes commensurate with the purchase of a new motor pump.

For information on how to replace the motor pump starter, see the next video.