Hydraulic Unit; Remove; Install - Yale 524150797 Maintenance Manual

1900 YRM 1506

REMOVE

WARNING
Batteries are heavy and can cause personal in-
jury. Use care to avoid injury. DO NOT put hands,
arms, feet, and/or legs between the battery and a
solid object. Make sure the capacity of the crane
and spreader bar is greater than the weight of the
battery. The weight of the battery is normally
shown on the battery case. The maximum battery
weight is shown on the lift truck nameplate. The
spreader bar must NOT be made of metal or it
must have insulated straps.
WARNING
Put blocks under each side of the truck under the
drive unit frame. Position blocks on both sides of
the load wheels. The blocks must prevent the lift
truck from falling and causing personal injury or
property damage.
WARNING
The capacitor in the controller can hold an electri-
cal charge after the battery is disconnected. To
prevent electrical shock and personal injury, dis-
charge the capacitor before inspecting or repair-
ing any component in the drive unit compartment.
Wear safety glasses. Make certain the battery has
been disconnected. Refer to Special Precautions
in this manual.
CAUTION
Make certain the hydraulic cylinder is fully col-
lapsed.
1. Remove the drive unit compartment cover. Refer
to AC Motor Repair 0620YRM1513, Accessing
the Drive Unit Compartment.
2. Disconnect the battery. Use a spreader bar and
lifting device to remove the battery. DO NOT al-
low the battery move from side to side. Make sure
the battery cables have clearance. Refer to:
• Periodic Maintenance 8000YRM1510
for lift truck model A249
• Periodic Maintenance 8000YRM1666
for lift truck model A245

Hydraulic Unit

3. Raise the drive wheel off the floor and put blocks
under both sides of the drive unit frame. Refer to:
•
•
4. Discharge the capacitor. See Special Precau-
tions.
5. Drain the hydraulic oil from the hydraulic unit into
an appropriate container.
6. Tag and disconnect all of the electrical wires from
the hydraulic unit.
7. Remove the hydraulic line from the hydraulic unit.
8. Loosen and remove the two capscrews attaching
the hydraulic unit to the frame. Remove the hy-
draulic unit and place in a clean work area.

INSTALL

1. Align the hydraulic unit with the mounting holes in
the frame and install the two capscrews. Tighten
the
35 N•m (26 lbf ft).
2. Install the hydraulic line to the hydraulic unit.
3. Connect all the electrical wires to the hydraulic
unit.
4. Remove the blocks and lower the lift truck to the
floor.
5. Remove the breather and add the recommended
hydraulic oil until the oil level reaches the full level
mark. Replace the breather. If too much hydraulic
oil is added, the oil will leak from the breather dur-
ing operation.
6. Install and connect the battery. Operate the lift
truck until the hydraulic oil reaches operating tem-
perature. Add additional oil if necessary. Check
for hydraulic oil leaks.
7. Install the drive unit compartment cover. Test the
operation of the lift truck prior to returning the
truck to service.
Periodic Maintenance 8000YRM1510
for lift truck model A249
Periodic Maintenance 8000YRM1666
for lift truck model A245
hydraulic unit mounting
Hydraulic Unit
capscrews to
5