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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.
Securing for Day
At the end of each work day the MHP15/44HD
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.
MHP15/44HD – 12885A
Rev F
10. Operation
page 10 - 9
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