Larzep Z12101, Operating Instructions Manual, Page: 12 / 28

12 193552102 - v.1 - UPD 300817
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 fi lter
Periodically clean the air fi lter.
If you use the pump in an intensive manner, we suggest a weekly check.
The air
fi lter is inside the inlet pneumatic fi tting ( fi g.10, page 3).
● Use a slotted tip screwdriver of the appropriate size to unscrew the fi lter from the air inlet connection until it is extracted.
● Clean the fi lter with compressed air and then re fi t and screw it into position. Do not over-tighten the fi lter or damage may ensue.
● Reconnect the air line quick coupler after binding the thread with Te fl on tape.
If the air fi lter is excessively contaminated or damaged, it must be renewed. Order a new fi lter 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 contains the correct quantity of hydraulic oil by checking the level on the sight glass ( fi g.11, page
4). If the oil level, with cylinder closed, is below minimum (D, fi g.11), re fi ll using the reccomended types of oil on page 8.
● Through a slotted tip screwdriver, pull out the fi ller plug ( fi g.12, page 7), then add the necessary oil amount.
● Clean the oil fi ller inlet and the fi lling plug with a clean cloth and insert the plug again, pressing it fully down (pos.A in fi g.4, page 3),
until it locks.
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 slotted tip screwdriver to remove the fi ller plug ( fi g.12, page 7).
● Empty the pump of oil by turning it upside down over a suitable container.
● Allow all the oil to fl ow into the container and then fi ll the pump with the quantity and type of new oil speci fi ed on page 9.
● Clean the oil fi ller inlet and the fi lling plug with a clean cloth and insert the plug again, pressing it fully down (pos.A in fi g.4, page 3),
until it locks.
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 fi ttings should be
sealed with protections for threads.
Grease and dust should be removed from all pipe connections.
Any equipment
fi tted to the pump should be kept clean.
Use clean hydraulic oil only, which complies with the features in the table on page 9 and change it as recommended (every 250 hours).