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10.2.2 Duty diesel pump
Check if all the screws are in place and correctly
tightened on a regular basis.
The diesel engine is coupled to the pump through a
cardan shaft. This kind of coupling does not
require a specific alignment.
For more information about the maintenance of diesel
engines, refer to the specific documentation provided with
the pump set.
For diesel engines, as for all internal combustion
engines, there are regularly scheduled service
intervals depending on the hours of operation of the engine or the
time passed since commissioning (for example, periodic check of
engine oil or cooling liquid).
10.2.2.1 Oil check and replacement
During oil replacement, use adequate tool to avoid lifting
excessive loads which can give rise to falls or
musculoskeletal problems.
For more information about the maintenance of diesel
engines, refer to the specific documentation provided with
the pump set.
Check the oil level periodically, and refill it if necessary.
10.2.2.2 Cooling circuit of the diesel engine
WARNING
Hot surface
Death or serious personal injury
‐
Do not open the cap of the heat exchanger when the
motor is running and before ensuring that the heat
exchanger is cold.
The cooling circuit needs periodic checking. The frequency
of checking usually depends on the hours of operation, the
time passed since the circuit was put into operation and the quality
of the water used for the secondary heat exchanger circuit
(water from the firefighting system).
10.2.2.3 Checking the coolant level
WARNING
Toxic material
Death or serious personal injury
‐
Avoid contact with eyes and skin, and do now swallow
the coolant.
1. Make sure that the engine is switched off.
2. Open the cap of the exchanger.
3. Check the level of coolant inside the water/water heat
exchanger.
4. Refill the coolant, if necessary.
Use a mixture of demineralised water and antioxidant, antifreeze
fluid (inhibited ethylene-glycol type) appropriate for the purpose.
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10.2.2.4 Checking the water flow in the heat exchanger
1. Through the pressure gauge located upstream of the
exchanger, make sure that during operation of the diesel
pump, the pressure stays within the range indicated on the
gauge.
2. Excessive pressure indicates that there is an obstruction in the
heat exchanger or in the output of the circuit. Make sure that
there are no obstructions in the outlet side or in the exchanger.
3. Check the effective and correct water circulation of the heat
exchanger by a visual verification at the outlet of the drain pipe.
4. Check that the flow through the cooling system meets the
minimum requirement as specified in the technical
documentation for the specific model.
10.2.2.5 Cleaning the circuit of the heat exchanger
Clean the filter located upstream of the heat
exchanger frequently and regularly. The frequency
of cleaning depends on the quality of water used
for the firefighting system.
1. Make sure that the engine is switched off.
2. Close the shut-off valves upstream and downstream of the filter.
3. Open the bypass circuit. See the dedicated section about diesel
pumps with water cooling or water heat exchanger.
4. Remove the filter and clean it.
5. After cleaning is completed, restore the operating condition of
the cooling system by opening the gate valve.
Related information
4.3 Diesel pumps with water/water heat exchanger
10.2.3 Pressure tank
The pre-charge of the tank must be periodically checked and
adjusted in order to ensure proper operation of the pump set.
10.2.4 Flowmeter (optional)
The flowmeter requires no particular maintenance.
The presence of impurities in the pressure holes causes significant
reading errors, so we recommend cleaning the measurement
flange properly from time to time, and checking that the pressure
holes are clean and free from impurities.
If there are deposits in the glass graduated tube, you can clean the
duct inside the flowmeter. See the installation and operating
instructions of the flowmeter.
10.2.5 Batteries (for diesel pump starting)
The batteries are sealed and ready for use. They are charged from
the electronic battery chargers housed in the control panel.
The condition of the connections on the battery terminals must be
periodically checked. If there is corrosion, clean the battery
terminals.
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