Snorkel S3219E-sn000017+ - Manual (Page 29)

Chapter 8 – Prestart Inspection
S3219E/S4732E – 1500834 25
4. Raise the platform while watching movement of the
skids. The skids should lower to approximately 3/4″
(1.9 cm) ground clearance when the platform is raised
approximately 24″ (61 cm).
5. Fully lower the platform while watching movement
of the skids. The skids should raise to their stowed
position, with about 2.63″ (6.68 cm) ground clearance
when the platform is fully lowered.
6. Place a 1 1/2″ (3.8 cm) thick board, such as a 2 x 4,
under the skid on the left side (refer to Figure 8.12).
Figure 8.12 – Pothole Protector Skid
7. The board will prevent the skid from lowering fully.
Raise the platform. When the skid contacts the board,
the platform should stop raising and an alarm should
sound at approximately 7′ (2 m) platform floor height.
The alarm should then sound when the platform lift
switch is activated and the platform should not raise.
8. Lower the platform. Place the board under the skid
on the right side.
9. Raise the platform. When the skid contacts the board,
the platform should stop raising and an alarm should
sound at approximately 7′ (2 m) platform floor height.
The alarm should then sound when the platform lift
switch is activated and the platform should not raise.
Warning
The potential for an accident increases when safety
devices do not function properly. Death or serious
injury can result from such accidents. Do not alter,
disable, or override any safety device.
10. If the platform raise function is not disabled, or the
alarm does not sound remove the aerial platform from
service until the problem is corrected.
Warning
The potential for an accident increases when operat-
ing an aerial platform that is damaged or malfunction-
ing. 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 posi-
tion. 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.
Lowering Alarm
To test the lowering alarm from the lower controls:
1. Raise the platform approximately 10′ (3 m).
2. Lower the platform and make sure the alarm sounds.
Pothole Protector Interlock
Perform this test using the lower controls.
1. Stow the aerial platform on a smooth, flat, level con-
crete slab.
2. Remove all persons and materials from the plat-
form.
3. With the trays closed, check the ground clearance
under the pothole protector skids (refer to Figure
8.11). Clearance should be at about 2.63″ (6.68 cm)
on both sides of the aerial platform.
Figure 8.11 – Pothole Protector Skid
Pothole Protector Skid
2 x 4