Snorkel MHP34J - Manual (Page 42)

■ Ground Control Switches
Figure 7.22 - Ground Control Switches
With the Ground/Platform Selector

set to
ground:
Check that each of the platform moving switches
(
€
through to
ƒ
) cause the MHP12/34J 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 MHP12/34J
engine off when the red cover is struck.
■ Emergency Lower
❑
Lower control box
Figure 7.23 - Emergency Lower Valve
With the booms raised open the Emergency
Lower Valve on the top of the manifold valve.
The booms should be gin to lower. The rate of low -
er ing can be reg u lated by the amount the valve is
opened.
To check the slew func tion when us ing the man ual
emer gency lower valve the
Mas ter Key Switch
and Emer gency Stop switch must be on and the
Plat form/ground Se lec tor must be set to ground.
To slew (with the man ual emer gency lower valve
al ready open) se lect the re quired di rec tion on the
slew tog gle switch .
NOTE
The manual emergency lower valve 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
Figure 7.24 - Platform Control Switches
page 7 - 6 MHP12/34J – 11447A
7. Daily Inspection and Maintenance