Checking Level And Change Of The Hydraulic Oil; Checking The Hydraulic Oil On The 2.4 Lt. And 5 Lt. Pump; Checking The Hydraulic Oil On The 7, 10 And 20 Lt. Pump; Hydraulic Oil Change - Bell UPM 252 Gebrauchs- Und Wartungsanleitung

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 on the 2.4 Lt. and 5 Lt. pump.

● Periodically check that the pump contains the correct quantity of hydraulic oil by checking the level on the sight glass (fi g.11a, page
5). If the oil level, with cylinder closed, is below minimum (E, fi g.11a), refi ll using the reccomended types of oil on page 19.
● Through a slotted tip screwdriver, pull out the fi ller plug (fi g.12, page 17), 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 by pressing it until it locks or until it reaches
the venting position.

7.3.2 - Checking the hydraulic oil on the 7, 10 and 20 Lt. pump.

● Periodically check the oil level, which must be between the two notches on the oil cap dipstick (F in fi g.11b, page 5). If the oil level,
with cylinder closed, is below minimum, refi ll using the reccomended types of oil on page 19.
● Pull out the oil cap and check the level on the rod. If necessary, add the amount of oil needed to reach a level slightly lower than the
higher rod notch.
● Clean the oil fi ller inlet and the cap with a clean cloth and insert the cap again. Ensure you have added enough oil, then close and
lock the cap.

7.3.3 - Hydraulic oil change

Change the oil at intervals of 250 duty hours. This operation must be performed when the cylinder is fully retracted:
● If the pump is mounted vertically, disassemble it and position it horizontally.
● Use a slotted tip screwdriver to remove the fi ller plug (fi g.12, page 17).
● 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 specifi ed on page 19.
● Clean the oil fi ller inlet with a clean cloth and refi t the fi ller plug, pressing it fully down or, if necessary, to the partially inserted breather
position.

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 19 and change it as recommended (every 250 hours).
193558045 - v.6 UPD 310117
23