SkyTrak 8042 Service Manual - Manual (Page 484)

8.69 Model 8042, 10042, 10054 Legacy Rev. 10/03
Hydraulic System
Occasionally, fluid may seep, leak or be more forcefully
expelled from the filter head (11) when system pressure
exceeds the rating of the filter head or breather. If the
return filter becomes plugged, return hydraulic oil will
bypass the filter when pressure reaches 25 psi (1,7 bar)
and return to the reservoir unfiltered.
Carefully examine fluid seepage or leaks from the
hydraulic reservoir to determine the exact cause. Clean
the reservoir and note where any seepage occurs.
Leaks from a cracked or damaged reservoir require that
the reservoir be removed from the vehicle, flushed
completely with water and repaired by a certified welder
using approved techniques. If these conditions cannot be
met, the reservoir must be replaced in its entirety.
Contact Sky Trak distributor or the JLG Service
Department at 1-877-554-5438 or 1-717-485-6657,
should reservoir welding or replacement be required.
8.10.1 Hydraulic Reservoir Replacement
The fuel tank/hydraulic reservoir (1 and 2) are one unit
and are removed together. Refer to Section 7A.8.2, “Fuel/
Hydraulic Oil Tank,” or Section 7B.8.2, “Fuel/Hydraulic
Oil Tank,” for information on the fuel tank/hydraulic
reservoir removal. Support the fuel tank/hydraulic
reservoir with a suitable device. Loosen, but do not
remove, the hex nuts (10) on the carriage assemblies.
Slide the unit to the right to allow the carriage bolt heads
to come through the slots in the frame.
Install the replacement fuel tank/hydraulic reservoir (1, 2),
sliding the carriage bolt assemblies into the slots in the
frame. Slide the unit to the left and secure it to the vehicle
by tightening the hex nuts (10).
DANGER:
NEVER weld in, on, near or
around the hydraulic reservoir. Hydraulic fluid and
fumes can cause the reservoir to explode. This
can result in death or serious personal injury.