RMX SERIES
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4 8 3 0 1 8 - 3 / 1 5
T e r e x S o u t h D a k o t a
R M X S e r i e s
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OPERATION
BOOM OPERATION
The RMX Series is a non-overcenter material handling Aerial Device. The normal material handling
operating range is when the upper boom is below 70 degrees above horizontal and the lower boom is below
90 degrees above horizontal. The lower boom will articulate up to 118 degrees but only to allow ground
access to the platform, not for material handling. To articulate the lower boom between 90 and 118 degrees
the upper boom must be less than 50 degrees open from the lower boom.
The upper boom will operate up to 75 degrees above horizontal. When the boom reaches 70 degrees above
horizontal it slows down for the last 5 degrees of travel. The lower boom will also stop lowering or going in
the stowed direction, when the upper boom is at 75 degrees. The lower boom articulation will be disabled
when the upper boom gets to 75 degrees above horizontal. When boom movement is stopped by the limit
system it will be necessary to lower the upper boom or raise the lower boom slightly to reset the valves and
allow operation.
The normal operating range is 0 to +90 degrees for the lower boom and -85 to +70 degrees for the upper
boom. Within this range full jib capacity is available and boom movement is unrestricted. When the lower
boom gets to 90 degrees it trips a switch that disables upper boom up and lower boom up. If you wish to
raise the upper boom at this position, you must back the lower boom off slightly below 90 degrees. This
allows the platform to get close to the ground to get in and out of the platform. To get to the ground the lower
boom must articulate to 118 degrees. That cannot happen unless the angle between the booms is less than
50 degrees. The operator must be aware of where the boom is during operation and not operate if the lower
boom is above 90 degrees, except for ground access. The limit system is an operator aid, do not depend on
it but operate only in the non-overcenter range.
All boom movements should be smooth. Avoid jerking by slowly metering the control valves when starting
and stopping all motions. Start and stop all boom movements with a low engine speed to make it easier to
“feather” the controls for smooth operation. Lift the boom off the rest and elevate it high enough to clear all
body obstructions before rotating. RMX Series Aerial Devices are equipped with a standard three port
collector block oil distribution center in the mast which permits the continuous rotation of the boom in either
direction without stops.
UNSTORE THE BOOM
Before attempting to raise the booms, remove all boom hold down straps. Ensure area overhead is clear and
raise upper boom before raising lower boom. Raise booms sufficiently to clear all obstructions before
rotating.
Failure to operate in the non-overcenter range or to lift materials with the lower boom
above 90 degrees may cause structural damage or tip over.
Make certain that all personnel are in the clear and that there is sufficient overhead
clearance before operating the Aerial Device.
