Making a Typical Lift
Making a Typical Lift
In making lifts, the operator must successfully coordinate several crane functions. These
include the boom raise/lower, boom extend/retract, load hoist/lower and swing functions.
Although experienced operators tend to operate two or more of these functions
simultaneously, the lift procedure can be broken down into the following sequence of
operations.
OUTRIGGERS
Set the outriggers as follows before initiating any lifting operations:
1. Remove the outrigger beam retaining pins.
2. To set the four(4) outriggers evenly, operate switches to raise crane to a level
position. When level, retract jacks (together) at one end of crane an inch or so,
and then extend them again (together) until crane is level. Then repeat this
process for the opposite end of crane. This equalizes pressure in all four jacks.
The controls for the out and down outriggers are mounted on the dash. The
extend/retract master switch must be actuated before the appropriate function
switches can be actuated to operate the outriggers.
This is a safety feature to prevent accidental actuation of the outriggers
while the crane is in motion because the STEERING IS NON-FUNCTIONAL
WHILE THE OUTRIGGERS ARE BEING OPERATED.
The crane MUST BE LEVELED prior to extending the boom or lifting loads. To
achieve this condition, the vertical jack cylinders should be extended only
enough to lift the wheels off the ground.
FULL extension of the vertical jack cylinders should be avoided if not
necessary to level crane and raise wheels clear of ground because oil
expansion under extreme heat conditions can cause cylinder seal failure.
Check to ensure that all beams are fully extended, swinging the upper if
necessary to visually check that each beam reaches full extension. Level
the crane using the bubble indicator to determine when a level condition is
achieved. While operating the crane, frequently check and level the
outriggers between lifts.
Operating Instructions
92 P/N 12261-319 REVISED: August 2012
Courtesy of Crane.Market
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