Listed below are special precautions for “On Tires” lifts.
All crane load ratings are based on nonuse of the travel
function while handling loads. However, cranes may
be utilized for pick and carry operations. Traveling with
suspended loads involves so many variables such as
ground conditions, boom length, momentum in starting
and stopping, etc., that it is impossible to devise a sin-
gle standard rating procedure with any assurance of
safety. For such operations the user must evaluate
prevailing conditions and determine safe practices, ex-
ercising precautions, such as the following:
1.The boom shall be carried straight over the front of
the crane.
2. Travel speed reduced to suit conditions.
3. Maintain specified tire pressures.
4. Avoid sudden starts and stops.
5.Provide tag or restraint lines to snub swinging of the
load.
6. Keep the load as close to ground as possible.
7. Set the swing brake and swing lock.
8. Travel must be on a smooth level surface that is ca-
pable of supporting the weight of the loaded crane.
The travel surface must also be free of holes or de-
bris that can cause crane instability.
These precautions are necessary to prevent a “pendu-
lum” effect of a swinging load. The results of this hap-
pening can cause a machine tip over.
Any variation from the above conditions will require
the operator to consider the prevailing conditions and
reduce the lift capacities accordingly.
Insufficient tire pressure reduces the “ON TIRES” ca-
pacity. Attempts to pick rated capacity without properly
inflated tires may cause crane to tip and/or result in
damage to tires and rims.
The axle lockout system should be bled and filled
whenever oil seepage, dirt or oil is detected at the
breather plug or on the rod.
Air in the axle lockout system decreases stability.
Bleed and fill the system IMMEDIATELY whenever
this condition occurs.
Excessive high hydraulic oil temperatures cause rapid
deterioration of rubber components (hose, o-rings,
etc.). A hydraulic oil cooler is required if high cyclic op-
erations (clam, concrete bucket, unloading) are per-
formed. If hydraulic reservoir temperature reaches 200
deg. F, reduce the duty cycle. Stop operations as re-
quired to prevent further increase in the hydraulic oil
temperature.
OPERATING PROCEDURES
“ON TIRES” LIFTS
Revised: October 20053 - 11RT700
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