Hydraulic System
8.8
3507, 3508, 3509, 3512, 3513, 4007, 4008, 4009, 4012, 4013
8.6
HYDRAULIC RESERVOIR
The hydraulic reservoir is a one piece unit. It is located
under the rear of the machine cab. Occasionally, fluid
may seep, leak or be more forcefully expelled from the
breather when system pressure exceeds the rating of the
filter head or breather. If the return filter becomes
plugged, the return hydraulic oil will bypass the filter when
pressure reaches 1,7 bar (25 psi) 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.
8.6.1
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 engine cover. Allow the system fluids to
cool.
4. Disconnect the battery negative (-) cable from the
battery negative (-) terminal.
5. Open the filler cap on the hydraulic oil reservoir.
Remove the drain plug at the bottom 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.
8.6.2
Hydraulic Oil Reservoir Filling
1. Be sure 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 2.4, “Fluids, Lubricants and
Capacities.”
4. Connect the battery negative (-) cable to the battery
negative (-) terminal.
5. Close and secure the engine cover.
8.6.3
Hydraulic Oil Reservoir Removal/
Installation
If it is determined that the hydraulic oil reservoir must be
removed, the hydraulic oil must be drained before the
reservoir is removed. Always dispose of hydraulic oil
properly.
a. Reservoir Removal
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 engine cover. Allow the system fluids to
cool.
4. Disconnect the battery negative (-) cable from the
battery negative (-) terminal.
5. Drain the hydraulic oil reservoir. Refer to Section
8.6.1, “Hydraulic Oil Reservoir Draining.”
6. Loosen the clamps and remove and cap the suction
and return hoses on the hydraulic oil reservoir.
7. Plug and cap the fittings on the hydraulic oil
reservoir.
8. Support the hydraulic oil reservoir from the bottom
and remove the six bolts, washers and nuts.
9. Carefully lower the reservoir to the ground.
b. Disassembly
The hydraulic oil reservoir is a one-piece unit and cannot
be disassembled. The hydraulic oil level sight-glass and
hydraulic oil filler cap can be removed and reused on the
new replacement reservoir. Dispose of the old reservoir
according to local regulations concerning hazardous
materials disposal.
MZ0130
