Snorkel TL39T - Manual (Page 46)

page 7-6 Rev C
Check to see that the ladder structure is undamaged
and that none of the fixing bolts are missing.
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Flashing Light (option)
Visually check the optional flashing light, to see
that the light flashes at approximately one flash per
second when the motor key switch is turned on.
Before proceeding with the next section of the
Pre-operational Inspection you will need to start
the engine and set the stabilisers. Refer to the
‘Operation’ chapter if you need assistance with this.
■
Ground Control Switches
Figure 7.19 - Ground Control Switches
With the Ground/Platform Selector Πset to ground:
Check that each of the platform moving switches (Œ
through to Œ) cause the TL39T to move the way it
should.
Check both positions of each switch.
For correct operating procedures see the
“Operation” chapter 8.
NOTE
Pay particular attention to the Emergency Stop
switch Πto see that it turns the TL39T engine off
when the red button is struck.
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Emergency Lower
There are two manual bleed down valves to operate
from the ground position. One controls the descent
of the lower boom and the other controls the
descent of the upper boom. The lower boom must
be lowered first.
❑ Ground Station
Figure 7.20.1 - Emergency Lower Valve,
Controlling Lower Boom
The valves are opened by pushing in the red knob
and turning it anti-clockwise 180 º .
With the booms raised open the valve on the lower
boom (see Figure 7.20.1). The boom should begin
to lower.
When the lower boom has fully descended open
the valve for the upper boom (see Figure 7.20.2).
The boom should begin to lower.
Figure 7.20.2 - Emergency Lower Valve,
Controlling Upper Boom.
NOTE
The manual emergency lower valves must be
closed after the test to ensure proper boom
operation. This is achieved by pushing in the
knurled red knob and turning it 180º clockwise.
For full details on emergency lowering operating
procedures see “Emergency Operation” chapter 9.
❑
Upper control box
Emergency lowering from the upper control box
is achieved by operating the Emergency Lower
switch and the Enable switchs together.
With the booms raised operate the emergency
lower and enable switches. The booms should
begin to lower together.
7. Pre-operational Inspection