Over-Centre Valve; Securing For Day - Snorkel MHP15HD Operator's Manual

10. Operation
Figure 10.23 - Movement Control, Platform
Control Box
All le ver move ment is ver ti cal. These plat form mov -
ing le vers, ( through
ing move ment.
1. Slew lever: Pressing this lever up causes
the column/boom/platform assembly to rotate
to the right, whilst pressing the lever down
causes the column/boom/platform assembly
to rotate to the left.
2. Lower boom lever: Moving this lever up will
raise the lower boom, whilst pressing it down
will cause the lower boom to descend.
3. Upper boom lever: Moving this lever up will
raise the upper boom, whilst pressing it down
will cause the upper boom to descend.
4. Jib boom lever: Moving this lever up causes
the jib boom to extend, whilst moving it down
causes the jib boom to retract.
5. Platform rotate switch: Pressing the lever
up causes the 'platform only' to rotate to the
right, whilst pressing the lever down causes
the 'platform only' to rotate to the left.
NOTE - Platform Control Valve Levers:
Depending on the configuration of your machine
you may not have a 'Platform Rotate' control.

Over-Centre valve

The func tion of this valve is to con trol the point at
which the up per boom reaches its max i mum
height.
When the valve is ac ti vated two things will oc cur:
1. The upper boom will stop rising
automatically.
2. The lower boom will not lower if activated.
When this hap pens the up per boom must be low -
ered which will de ac ti vate the over-cen tre valve
thus re stor ing all nor mal boom func tions.
page 10 - 10
), will pro duce the fol low -

Securing for Day

At the end of each work day the MHP15/44HD V2
should be re turned to the STOWED POSITION
and locked as de scribed un der "Stowing" in the
"Stowing and Trans porting" chap ter 12.
Rev B MHP15/44HD V2 – 13620-1