Free-Wheeling Valve; Diagnostic Center Display; Tires And Wheels; Lower Control Station - Snorkel S2255RT Operator's Manual

2. Make sure the hoses are properly routed to avoid
sharp edges, kinking, and scuffi ng.
3. Inspect the tubes for dents or other damage that
may restrict fl uid fl ow.
4. Make sure all hoses and tubes are held fi rmly in
their support brackets.
5. Check under the chassis for fl uid that has leaked.
Hydraulic fl uid leaks are easily visible on the ground.

Free-Wheeling Valve

The free-wheeling valve is on the main manifold in the
hydraulic cabinet. (refer to Figure 7.5).
Check the free-wheeling valve to make sure it is in its
normal operation position (closed).

Diagnostic Center Display

To test the diagnostic center display from the lower
controls:
1. Turn the battery disconnect switch to the on position.
2. Pull the emergency stop button outward to the on
position.
3. The display on the LCD screen should indicate:
Ÿ The accumulated aerial platform operating time.

Tires and Wheels

Visually inspect the tires and wheels (refer to Figure 7.6)
to make sure they are suitable for service.
Figure 7.6 – Tires and Wheels
To inspect the tires and wheels:
1. Visually inspect the tires. They should be smooth
without any cuts, gouges, or missing rubber that
might aff ect aerial platform stability.
2. Check the wheels to see that the fasteners are in
place and are not damaged or loose.

Lower Control Station

With no personnel or materials in the platform, test the
operation of each control from the lower controls (refer
to Figure 7.7).
S2255RT S2755RT - 15286-1
Chapter 7 – Prestart Inspection
Figure 7.7 – Lower Controls

Operating Controls

Use the following procedure to operate and test the
machine from the lower controls:
1. Turn the battery disconnect switch on.
2. Pull the emergency stop switch outward to the on
position.
3. Switch the control select switch downward in the
lower controls position.
Danger
Pinch points may exist between moving com-
ponents. Death or serious injury will result from
becoming trapped between components, build-
ings, structures, or other obstacles. Make sure all
personnel stand clear of the aerial platform while
performing the prestart inspection.
Warning
The potential for an accident increases when oper-
ating an aerial platform that is damaged or malfunc-
tioning. Death or serious injury could result from
such accidents. Do not operate the aerial platform
if it is damaged or malfunctioning.
4. Test the operation of the platform raise/lower switch
in both directions.
5. Place the battery disconnect switch in the off po-
sition. The platform should not raise or lower with
the disconnect in this position.

Emergency Stop

To test the emergency stop button from the lower
controls:
1. Push the emergency stop button inward to turn off
electrical power.
2. Test the lower control functions to make sure they do
not operate with the emergency stop in this position.
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