Hydraulic System Warm-Up Switch; Manually Warming The Hydraulic System; Preparing For Operation; Lower Controls - Snorkel AB60J Operator's Manual

Chapter 8 – Operation
teristics and can increase component wear. Only use
hydraulic fluid as recommended.
Use cold weather hydraulic oil as recommended in the
machine General Specifications in temperatures of 10°F
(-12°C) or below.

Hydraulic System Warm-up Switch

This system may be used to warm the hydraulic fluid when
the ambient temperature is below 32°F (0°C) and boom
movement is sluggish because of cold fluid.
There may be a toggle switch for the warm-up system on
the lower control panel and/or one on the upper control
panel.
The engine must be running and the switch used to turn
the system on must be at the same location that the en-
gine was started. For example, if the engine was started
from the lower controls, the warm-up switch at the lower
controls must be used for the system to operate.
To operate the warm-up system:
1. Start the engine and place the engine throttle in the
low position.
2. From the same control station that the engine was
started, place the warm-up switch in the on posi-
tion.
3. After the hydraulic fluid reaches 50°F (10°C) as indi-
cated on the thermometer, place the warm-up switch
in the off position.

Manually Warming The Hydraulic System

The hydraulic oil may be warmed by bottoming out the
boom extension cylinder. Raise the main boom so it is
horizontal and operate the boom retract function while the
machine is stowed. With the cylinder bottomed out the oil
flow will produce heat to warm the hydraulic oil.
Caution
Not all hydraulic fluid is suitable to use in the hy-
draulic system. Some have poor lubricating charac-
teristics and can increase component wear. Only use
hydraulic fluid as recommended.
Use cold weather hydraulic oil as recommended in the
machine General Specifications in temperatures of 10°F
(-12°C) or below.

Preparing for Operation

Use the following procedure to prepare the aerial platform
for operation:
1. Perform a prestart inspection as described in Chapter 7.
2. Place the battery disconnect switch in the on position.
3. Close and latch the cowling doors.
46
4. Before painting or sandblasting make sure the sand-
blast protection kit and the platform control cover are
properly installed. These options, when used properly
will protect the control placards and cylinder rods from
paint overspray and abrasion while sandblasting.

Lower Controls

The lower controls override the upper controls. This
means that the lower controls can always be used to
operate the platform regardless of the position of the
upper control emergency stop button.
Boom, turntable, and platform functions may be operated
from the lower controls. The lower controls may be used
for initial set up of the aerial platform, and for testing and
inspection.
Use the following procedure to operate boom, turntable,
or platform functions using the lower controls.
1. On dual fuel machines, set the fuel switch to either
LPG or gasoline (refer to Figure 8.2).
Control Selector
Switch
Emergency
Stop Button
Fuel Switch
Figure 8.2 – Lower Controls
2. Open the shut-off valve on the tank if using LPG.
3. Pull the emergency stop button (refer to Figure 8.2)
outward and place the control selector switch in the
lower control position.
4. Turn the start switch to on and pause a few seconds
while the alarm sounds to alert others that the ma-
chine is about to start. Turn the switch to start, then
release it to on. The engine will not start if the switch is
left in the on position for 30 seconds or longer before
turning it to start. The switch must be turned back to
off before the engine will start.
Note
If the machine has a GM engine, there will be a 7 to 10
second delay after starting the engine, before the throttle
will go to mid or high. Start the engine and wait 10 seconds
before proceeding with machine operation.
5. Let the engine warm to operating temperature.
Ground Operation
Switch
Start Switch
AB60J – 0181972