Operation From Ground Control Station; Hydraulic Control Machines - Snorkel MHP15HD Operator's Manual

11. Emergency Operation
IMPORTANT
The MHP1544HD has an ENABLE switch
fitted to the Upper & Lower control boxes.
(see Chapter 6 for a full explanation of the
operation of this switch).
Hydraulic machines will be fitted with a
FOOT OPERATED ENABLE switch.
On those machines fitted with the foot
switch option, both the switch on the control
box and the foot switch perform the same
function.
However it is assumed that for units fitted
with a foot switch this will be the preferred
method of operation.
Figure 11.3 - Enable Switch (Foot)
4. Step on the platform foot switch
Figure 11.3).
5. Whilst still operating the enable switch, press
and hold the Emergency Lower switch
down and the upper boom will begin
lowering.
6. To operate other functions dur ing the
emer gency lower the fol low ing switches must
be op er ated to gether.
En able or (foot switch - Fig ure 11.3)
Emer gency Lower
As soon as these switches are operated the
upper boom will begin descending. If another
function is desired it must be selected before
the boom has reached the rest position
e.g. Up per or Lower Boom
Slew
NOTE:
When emer gency low er ing, it is only pos si ble to
Slew or lower the Jib Boom whilst the Up per
boom is low er ing.
page 11 - 2

Operation from ground control station

hydraulic control machines

Emer gency op er a tion from the ground is very sim i -
lar to emer gency op er a tion from the plat form.
Ground Control Station settings
1. The Emer gency Stop switch
(ON) (see Fig ure 11.4).
2. The Plat form/Ground Se lec tor switch
(see Fig ure 11.4) must be set to GROUND.
(see
Figure 11.4 - Ground Controls, Machines with
3. Op er ate the En able switch
switch down and hold it down .
4. Whilst still operating the enable switch, press
and hold the Emergency Lower switch
down and the upper boom will begin
lowering.
5. To op er ate other func tions dur ing the
emer gency lower the fol low ing switches
and/or valve le vers must be op er ated
to gether.
or
En able
As soon as these switches are op er ated the
up per boom will be gin de4scending. If
an other func tion is de sired it must be
se lected be fore the boom has reached the
rest po si tion
e.g. Up per or Lower Boom
Slew
Rev B
LIFT
ENABLE lb
kg
EMERGENCY
LOWER
BOOMS
ELECTRIC STABILISER START
PLATFORM
ON
OFF
ON
BASE
Hydraulic Controls
Emer gency Lower
MHP15/44HD V2 – 13620-1
must be
ENABLE
CHOKE
13540-1 REV B
by press ing the
or