
80 SEBU7494-06
Operation Section
Parking
Before lowerin
g any equipment with the engine
stopped, clear the area around the equipment of all
personnel. The procedure will vary with the type of
equipment tha
t is lowered. Keep in mind that most
systems use a high pressure fluid or air in order to
raise or lower the equipment. The procedure will
cause high pr
essure air, hydraulic fluid, or some other
media to be released in order to lower the equipment.
Wear appropriate personal protective equipment and
follow the e
stablished procedure in the Operation
and Maintenance Manual, “Equipment Lowering with
Engine Stopped” in the Operation Section of the
manual.
Lowering th
e Equipment with the
Accumulator Charged
If electrical power is available and the accumulator
is charged, the loader arms can be lowered from the
operator s
tation with the work tool control.
1. Fasten the seat belt. Lower the armrest.
2. Turn the engine start switch key to the ON position.
3. Push the pa
rking brake switch.
4. Slowly move the work tool control to the LOWER
position i
n order to slowly lower the loader arms.
If the loader arms do not lower, the accumulator is not
charged. I
t is possible to recharge the accumulator by
cranking the engine for a period of fifteen seconds.
Repeat step 3 and 4.
If there is no electrical power the loader arms must
be lowered by using the procedure that is explained
next.
Lowering
the Equipm ent with the
Accumulator Discharged
Persona
l injury can result from oil under high
pressure.
DO NOT al
low high pressure oil to contact skin.
Wear appropriate protective equipment while
working
with high pressure oil systems.
The loader arms must be lowered manually if the
loader a
rms cannot be lowered by using the previous
procedure.
Do not go under t
he raised lift arm without the brace
for the loader lift arm in the LOCKED position. Use
the alternate exit if the brace for the loader lift arm
cannot be inst
alledonraisedliftarms.
1. Open the engine access door. Refer to Operation
and Maintena
nce Manual, “Access Doors and
Covers”.
Note: Make su
re that there are no people near the
front or sides of the machine.
g00953450
Illustration 67
2. The bypass valve is located on the left side of
the engine compartment. Slowly turn the square
stem on the bypass valve in a clockwise direction.
The square stem should be rotated 90 degrees.
Allow the loader arms to lower until the work tool
is on the ground.
3. Slowly turn the square stem on the bypass valve in
a counterclockwise direction until the stem stops.
The square stem should be rotated 90 degrees.
4. Close the engine access door.
5. Make the necessary repairs before you operate
the machine.
i01947381
Machine Storage Pro cedu re
SMCS Code: 7000
NOTICE
If long term storage for a period of time exceeding one
year is necessary, contact your local Caterpillar deal-
er for the preferred procedure to use in your specific
case.
This machine may be stored for one year or less in
a temperature range of −32 °C (−25.6°F)to43°C
(109.4 °F).