Maintenance; Checking Connections; Cleaning The Air Filter; Checking Level And Change Of The Hydraulic Oil - Bell HP250 AP Use And Maintenance Manual

7 - MAINTENANCE

The routine maintenance work described below must be performed exclusively by a skilled technician who has a thorough knowledge of
the pump and its operation and who has read this manual completely. Maintenance must be carried out with maximum caution to avoid
possible accidents. This chapter describes the only maintenance procedures permitted. Execution of any unauthorised maintenance
work will automatically invalidate the warranty and free the manufacturer from all liability.
BEFORE ANY OPERATION OF MAINTENANCE THE PUMP MUST BE DISCONNECTED FROM THE PNEU-
MATIC CIRCUIT. THEN PRESS "RELEASE" ON THE PEDAL TO UNLOAD THE OIL PRESSURE IN THE
HYDRAULIC CIRCUIT.
7.1 - Checking connections
Periodically check the hydraulic and pneumatic connections. Ensure that the connections on the pump are screwed down tightly and
show no signs of breakage, cracks or other damage. Ensure that the hoses are not damaged in any way (cuts, abrasion, cracks, etc.).
If you use the pump in an intensive manner, we suggest a weekly check.
7.2 - Cleaning the air filter
Periodically clean the air filter.
If you use the pump in an intensive manner, we suggest a weekly check.
The air filter is inside the inlet pneumatic fitting (fig.5, page 3).
● Use a slotted tip screwdriver of the appropriate size to unscrew the filter from the air inlet connection until it is extracted.
● Clean the filter with compressed air and then refit and screw it into position. Do not over-tighten the filter or damage may ensue.
● Reconnect the air line quick coupler after binding the thread with Teflon tape.
If the air filter is excessively contaminated or damaged, it must be renewed. Order a new filter from the manufacturer, referring to the list
of spare parts at the end of this manual.
7.3 - Checking level and change of the hydraulic oil
WARNING:
Before restoring the oil level, ensure that the connected cylinders are in a pulled-back position. The oil
volume that is discharged into the tank from the cylinders when are retracted, must bring the oil to the
maximum level allowed. Excessive filling or topping up without taking this factor into account may cause
the exceeding of the tank capacity, put the tank even under pressure and result in breaks with damage and
consequent risks to persons.
7.3.1 - Checking the hydraulic oil
● Periodically check that the pump is full of hydraulic oil by unscrewing the oil plug. If necessary, top up using an appropriate oil (see
table on page 15).
● Use a hexagon spanner diam.17 to remove the filler plug (fig. 6, page 13), than add the required amount of oil.
● Clean the inlet and the filler plug with a clean cloth and refit the plug, screwing it in completely.
7.3.2 - Hydraulic oil change
Change the oil at intervals of 250 duty hours. This operation must be performed when the cylinder is fully retracted:
● Use a hexagon spanner diam. 17 to remove the filler plug (fig. 6, page 13).
● Empty the pump of oil by turning it upside down over a suitable container.
● Allow all the oil to flow into the container and then fill the pump with the quantity and type of new oil specified in the table on page 15.
● Clean the opening using a clean cloth and refit the plug, screwing it in completely.
7.4 - Pump cleaning
The pump should be cleaned periodically in order to protect it as much as possible from dirt and debris. All unused fittings should be
sealed with protections for threads.
Grease and dust should be removed from all pipe connections.
Any equipment fitted to the pump should be kept clean.
Use clean hydraulic oil only, which complies with the features in the table on page 15 and change it as recommended (every 250 hours).
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193551050 v.7 - UPD 30012020