JLG X23J - X700AJ Service Manual - Manual (Page 88)

SECTION 3 - CHASSIS & TURNTABLE
3121448 – JLG Lift – 3-61
Oil filling
BEFORE THE STARTING UP, CHECK THE LEVEL OF LUBRICATING
OIL. IF NECESSARY, REFILL WITH LUBRICANT OIL.
This procedure is undertaken following the indications
given below.
1. Check that the gearbox axis is horizontal. Rotate the
gearbox housing until the plug (1) is on the top on
the vertical axis of the end cover.
2. Unscrew the oil plugs (1-2).
3. Fill from the hole (1) until the lubricant flows out from
the hole (2).
4. Screw the oil plugs (1-2).
5. Run the gearbox, after a few minutes, stop and
check the oil level.
6. If necessary, refill with lubricant oil (for plug orienta-
tion, size and dimension refer to the installation
drawing).
Figure 3-162.
Characteristics of the hydraulic system
The oil in the hydraulic system (which also lubricates the
hydraulic motor) must reflect the ISO VG 46 characteris-
tics. It must be filtered with a maximum grade of 10 μm
and with a level of contamination equal to or inferior to 22/
18/15 ISO/DIS 4406 or level 9 according NAS 1638.
It is advised not to mix together oils with different proper-
ties.
It is advised to use a filter with a led indicator that can be
seen externally, with a flow control valve that blocks the
flow of oil when the filter is clogged.
If it is necessary to work in low temperatures (artic cli-
mates) it is essential to use specific guidelines (contact
the manufacturer).
Checking the temperature of the hydraulic oil is one of the
most critical aspects of the hydraulic system.
High operational temperatures will cause a degradation of
the oxidation resistance level and will accelerate the dete-
rioration process of the hydraulic oil.
Therefore it is important to follow the measures below.
– The temperature of the hydraulic oil during work-
ing conditions should remain between 25°C and
90°C.
– The temperature of oil should reach -20°C prior to
start operation.
– During operation the oil temperature can rise to
90°C but this temperature is acceptable only for very
short periods of time.
These temperatures have been set to take into consider-
ation general degrading in viscosity as well as the wear
resisting additives used in the oil.
The life of the motor will be shortened considerably if the
operating temperature is constantly at a level that is higher
than 90°C.
Approximate oil
capacity
litres 0,6 ± 10%