3.0 Operation and Use
Geometric Requirements
Select a level area near the work opening that will allow the mast to be leveled in accordance with the leveling
bubble installed on the base. The location must also provide firm footing that will not allow the base to sink or
shift while in use. Position the base so the mast will be directly over the work area. The winch/SRL cable must
remain parallel to the mast while in use. Do not position the mast where the worker will have to swing under
the mast to reach the work area. The acceptable working area is directly under the mast, between the stabilizer
tubes. Avoid positioning the mast where the working line may abrade against sharp edges when in use.
Requirements for Personal Fall Arrest Systems
Personal fall arrest systems used with the mast and base typically include a full body harness, a connecting
subsystem (self retracting lifeline or lifeline rope to grab), and the necessary hardware to connect the system.
Personal fall arrest systems used with this mast and mounting base must meet applicable OSHA requirements.
Personal fall arrest systems that use a full body harness must limit the fall arrest forces to 1800lbs, and arrest the
fall within 42in. Body belts, unless part of a full body harness, are not recommended for use with this equipment.
Inspection of Equipment Prior to Use
•Check all structural parts for damage; dents, cracks,
weld bends, or crushed tubes. Minor cosmetic
damage will not affect the structural integrity of the
system, but any seriously damaged parts must be
repaired or replaced before use.
•Check all hardware; pins, tri-screws, adjuster
screws, nuts, bolts, pulleys, rollers, and winch
brackets for damaged threads, bends, damaged
or missing fasteners, or lose fasteners. Check all
pulleys and rollers for chips, grooves, and excessive
wear. Ensure that all pulleys and rollers turn freely.
•Inspect all equipment for missing, damaged, or
otherwise illegible warning stickers. Any damaged,
missing, or otherwise illegible stickers must be
replaced before using the system.
Inspection & Maintenance of Harnesses
Miller harnesses are designed for today's rugged work environments. To maintain their service life and high
performance, harnesses should be inspected frequently. Inspect the harness thoroughly before each use. Regular
inspection by a competent person for wear, damage or corrosion should be a part of your safety program. Inspect
your equipment daily and replace it if any defective conditions are found.
Inspection/Maintenance Schedule
•Daily (before each use):
See above "Inspection of Equipment Prior to Use".
•Weekly:
Perform a complete visual inspection of equipment as outlined in "Inspection of Equipment Prior to Use". Clean
equipment as required to thoroughly inspect all welds, labels, pins, fasteners, pulleys, rollers, brackets, and parts.
If any problems are found with the equipment do not use until it has been repaired.
•Biannually:
To be completed at least twice a year (every six months). Clean unit thoroughly using a damp cloth and a mild
soap solution. Perform a complete visual inspection as described above in "Inspection of Equipment Prior to Use".
Record date of inspection on inspection sticker. If any problems are found with the equipment, do not use until it
has been repaired.
USE R I N S TR U C TIO N S - E N G L I SH
•If you are using Miller DuraHoist winches with your
system, inspect the winch and cable as outlined in
their respective operator's manual.
•Any additional winches, self retracting lifelines
(SRL's), work positioning, or fall-arrest equipment
being used with your Miller DuraHoist System must
be installed, inspected, maintained, and operated
according to manufacturer's instructions.
•Report any problems with the equipment to your
supervisor and do not use the equipment until it has
been repaired or replaced.
•Store this equipment in a clean and dry environment
out of direct sunlight. Avoid areas with chemical
vapors. Inspect equipment after any period of
extended storage.