JLG G12-55A Service Manual - Manual (Page 129)

8-13 G10-55A, G12-55A
Hydraulic System
8.5 HYDRAULIC RESERVOIR
The hydraulic reservoir (1) is located on the frame
between the engine compartment and the cab.
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 engine cover. 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 hydraulic oil. Refer to Section
2.4, “Fluid and Lubricant Capacities.”
4. Properly connect the battery.
5. Close and secure the engine cover.
6. Remove the Do Not Operate Tags from both the
ignition key switch and the steering wheel.
8.5.3 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. Properly disconnect the battery.
5. Drain the hydraulic oil reservoir. Refer to Section
8.5.1, “Hydraulic Oil Reservoir Draining.”
6. Label, disconnect and cap all hydraulic hoses
attached to the hydraulic oil reservoir. Cap all fittings
and openings to keep dirt & debris from entering the
hydraulic system.
7. Remove the bolts securing the hydraulic oil reservoir
to the frame.
8. Remove the hydraulic oil reservoir.
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.
MY1150
1
JOHN DEERE/PERKINS
MY5300
1
CUMMINS