2-6
If specific outrigger foot loading is required for an
individual crane, contact National Crane with actual chas-
sis weights and crane details.
1. When Lifting Over the Rear of the Truck
Before conducting any boom operations, extend
both outriggers until the chassis weight is re-
moved from the wheels. Level the crane from
side-to-side. A level indicator is provided at ei-
ther control station. Then extend and lower the
stabilizers to level the crane front-to-back. Again
refer to the level indicator to insure that the crane
is properly leveled. Always keep the load as close
to the ground as possible.
2. When Lifting Over the Front of the Truck and the
Vehicle is Equipped with a Front Stabilizer
A front stabilizer is required when loads are to be
lifted over the front of the vehicle. Before con-
ducting any boom operations, extend both
outriggers until the chassis weight is removed
from the wheels. Level the crane side-to-side
using the level indicator located at either control
station as a reference. Then extend and lower
the rear stabilizers to level the crane front-to-
back. Again refer to the level indicator to insure
that the crane is properly leveled. After the crane
is leveled side-to-side and front-to-back, extend
the front stabilizer leg(s) until firm contact is made
with the ground. Always keep the load as close
to the ground as possible.
3. Rear Mount Units Equipped with Rear Stabilizer
A rear stabilizer is required when loads are to be
lifted over the rear of the vehicle. Before con-
ducting any boom operations, extend both
outriggers until the chassis weight is removed
from the wheels. Level the crane side-to-side
using the level indicator located at either control
station as a reference. Then extend and lower
the HO outriggers to level the crane front-to-back.
Again refer to the level indicator to insure that
the crane is properly leveled. After the crane is
leveled side-to-side and front-to-back, extend the
rear stabilizer leg until firm contact is made with
the ground. Always keep the load as close to the
ground as possible.
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4. Check to ensure that the jib, if so equipped, is
stowed correctly on the first section boom.
!,"+
1. Check all controls for proper operation by oper-
ating each system through one complete cycle.
This is particularly important after the unit has
been serviced or repaired. If any abnormal op-
erations are detected, correct the condition be-
fore continuing.
2. During all operations, the controls should be
metered when beginning or terminating a move-
ment to prevent sudden starting or stopping
which imposes undue shock loads on the equip-
ment. This metering can be performed by me-
tering the control lever and the foot throttle.
3. Check the operating area for electric powerlines.
360°
180°
"
!
Reference Only
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