INSTRUCTION, USE AND
MAINTENANCE MANUAL
GB
Page 35 of 96
Fig. 48
• Check periodically the oil level of the oil-pressure unit
and, in case, carry out the filling up with hydraulic
oil having a viscosity degree suitable for the average
temperatures of the country where the machine is
installed and in particular:
- viscosity 32 (for countries with room temperature
from 0 to 30 degrees);
- viscosity 46 (for countries with room temperature
above 30 degrees).
At least once a year it is advisable to proceed anyway
to the complete replacement of the hydraulic oil of
the hydraulic unit itself.
BEFORE CARRYING OUT ANY
MAINTENANCE WORK ON THE HY-
DRAULIC CIRCUIT, SET THE MA-
CHINE IN THE REST CONDITION.
• Periodically (about every 100 hours), check the oil
level of the reduction gear and eventually reset the
level.
• Check operation of the safety devices every week.
• Periodically (every 50 working hours approximately),
carry out the (inner and outer) guides of the tool
carriage.
A.
Place the whole support (
Fig. 49 ref. 1
) in horizon-
tal position, then check the reduction gear oil level
(
Fig. 49 ref. 2
); the level indicator window (
Fig. 49
ref. 3
)
must be covered with lubricant, otherwise,
remove a closing plug (
Fig. 49 ref. 4
)
and top up
using appropriate lubricants until the level is reset.
1
2
3
4
Fig. 49
B.
Check the belt tensioning (
Fig. 50 ref. 1
):
• Remove upper guard (
Fig. 50 ref. 2
) by unscrew-
ing the provided fixing screws;
• stretch the belt (
Fig. 50 ref. 1
) using the screw
(
Fig. 50 ref. 3
) after the nut (
Fig. 50 ref. 4
) has
been slackened;
• tighten the fixing nut (
Fig. 50 ref. 4
) after the
adjustment operations, then assemble the protec-
tion guard (
Fig. 50 ref. 2
) again.
1
3
4
2
Fig. 50
7522-M004-1_B
NAV51.15 - NAV51T.15 - NAV51.15N
