Snorkel S1930-snAP05168 - Manual (Page 27)

Chapter 8 – Prestart Inspection
S1930 – 0361527 23
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 6
′
(1.8 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 6
′
(1.8 m) platform floor height.
The alarm should then sound when the platform raise
switch is activated and the platform should not raise.
A
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.
Emergency Lowering
Using the lower controls, fully raise the platform. Locate
the emergency lowering lever (refer to Figure 8.14) at the
front of the aerial platform.
Figure 8.14 – Front of Chassis
While standing clear of the scissors structure, push the
lever down. The platform will begin to lower as the lever is
pushed down. Release the lever to stop. Make certain
the lever is fully released after lowering the platform.
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 platform.
3. With the trays closed, check the ground clearance
under the pothole protector skids (refer to Figure 8.12).
Clearance should be at least 2
3 /
4
″
(7 cm) on both
sides of the aerial platform.
Figure 8.12 – Pothole Protector Skid
4. Raise the platform while watching movement of the
skids. The skids should lower to approximately
3 /
4
″
(2 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
3 /
4
″
(7 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 8.13).
Figure 8.13 – Pothole Protector Skid
Pothole Protector Skid
Pothole Protector Skid
2 x 4
Emergency
Lowering Lever