Snorkel MHP17 - Manual (Page 42)

For cor rect op er at ing pro ce dures see the “Op er a -
tion” chap ter 8.
NOTE:
Pay particular attention to the Emergency Stop
switch „ to see that it turns the MHP16/47
engine off when the red cover is struck.
■ Emergency lower
❑ Lower control box
Figure 7.22 - Emergency Lower Valves
With the booms raised open the gold First Emer -
gency Lower Valve  on the top of the man i fold
valve.
The booms should be gin to lower and retract. The
rate of low er ing can be reg u lated by the amount the
valve is opened.
Once the booms are fully re tracted low er ing will
stop. Only then should the black Sec ond Emer -
gency Lower Valve € on the bot tom of the man i -
fold valve be opened.
This will al low the plat form to fully lower.
NOTE:
Both manual emergency lower valves must be
closed after the test to ensure proper boom
operation.
For cor rect emer gency low er ing op er at ing pro ce -
dures see “Emer gency Op er a tion” chap ter 9.
❑
Upper control box
Emer gency lower from the up per con trol box is
achieved by turn ing the up per con trol to on and de -
press ing the foot switch whilst op er at ing the Emer -
gency Lower switch
To slew the unit se lect the di rec tion re quired on the
slew tog gle switch at the same time.
For cor rect emer gency low er ing op er at ing pro ce -
dures see “Emer gency Op er a tion” chap ter 9.
■ Platform control switches
On the ground con trol box set the Ground/Plat -
form Se lec tor to plat form.
Figure 7.23 - Platform Control Switches
Check that each of the plat form mov ing switches
( through to ƒ) cause the plat form to move the
way it should.
Check both po si tions of each switch.
For cor rect op er at ing pro ce dures see the ”Op er a -
tion” chap ter 8.
NOTE:
Pay particular attention to the Emergency Stop
switch „ to see that it turns the MHP16/47
engine off when struck.
Pay particular attention to the platform foot switch
to see that it deactivates the platform moving
switches when the foot switch is not stepped on.
page 7 - 6 MHP16/47 – 11544A
7. Daily Inspection and Maintenance