SkyTrak 6036 Service Manual - Manual (Page 172)

Hydraulic System
8-20 6036, 6042, 8042, 10042, 10054
8.5 HYDRAULIC RESERVOIR
Hydraulic reservoir (1) and fuel tank are one unit. They
are located on the right side of the frame under a cover.
Occasionally, fluid may seep, leak or be more forcefully
expelled from the filter head (2) 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 machine, 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.
8.5.1 Hydraulic Oil Reservoir Draining
1. Park the machine on a firm, level surface, level the
machine, fully retract the boom, lower the boom,
place the transmission control lever in
(N) NEUTRAL, engage the park brake and shut the
engine OFF.
2. Place a Do Not Operate Tag on both the ignition key
switch and the steering wheel, stating that the
machine should not be operated.
3. Open the rear door. Allow the system fluids to cool.
4. Properly disconnect the battery.
5. Open the filler cap on the hydraulic oil reservoir.
Remove the drain plug on the side of the hydraulic
oil reservoir.
6. Transfer the used hydraulic oil into a suitable
covered container, and label as “Used Oil”. Dispose
of used oil at an approved recycling facility. Clean
and reinstall the drain plug.
7. Wipe up any hydraulic fluid spillage in, on, near and
around the machine and the work area.
8.5.2 Hydraulic Oil Reservoir Filling
1. Be sure the reservoir is clean and free of all debris.
2. Install a new hydraulic oil filter.
3. Fill the reservoir with Mobilfluid 424 ® (ISO Grade 46)
oil. Refer to Section 2.5, “Fluid Specifications.”
4. Properly connect the battery.
5. Remove the Do Not Operate Tags from both the
ignition key switch and the steering wheel.
6. Close and secure the rear door.
8.5.3 Hydraulic Filter Replacement
1. Be sure the reservoir is clean and free of all debris.
2. Loosen and remove the four nuts (3) securing the
filter head assembly (4) to the hydraulic reservoir.
3. Remove the filter head assembly from the hydraulic
reservoir allowing any excess hydraulic oil to drain
into the reservoir.
4. Remove the hydraulic filter (5) from the filter head.
5. Replace the hydraulic filter head gasket (6) if
necessary.
6. Install the new hydraulic filter to the filter head, lower
the hydraulic filter head assembly into the hydraulic
reservoir.
MH6180
1
2
MAQ1160
3
4
5
6