FSL-0019.DOCX
Page 7 of 14
Rev. 4
Hoist Assemblies
– Annual Inspection and maintenance of the hoist should be determined
by the Crane Owner as a function of the hoist type, past and anticipated duty cycle, and
condition. The quality of the hoist lubricant is a primary indicator of the mechanical integrity
of the hoist. Brakes should be tested by stalling the drive per 3.1 Brake Testing Procedure.
See API RP 2D Appendix D, Spring-set Hoist Brakes, for additional recommendations for
spring-set hoist brakes.
2.3 Tear down Inspections
Tear down inspections of TULSA WINCH hoists should be completed per the usage
schedule defined below. Magnetic Particle Inspection (MPI) of the internal ring gear
and reduction gears must be performed during tear down inspections to aid in the
detection of cracks in the ring gears due to fatigue. The preferred inspection method is
the Fluorescent Wet Magnetic Particle Inspection using ultraviolet light consistent with
ASTM E709.
Severe Usage - Perform tear down inspection / MPI at least every (2) years
Heavy Usage - Perform tear down inspection / MPI at least every (3) years
Moderate Usage - Perform tear down inspection / MPI at least every (4) years
Infrequent Usage - Perform tear down inspection / MPI at least every (6) years
It is strongly recommended that any moderate or infrequent usage hoist that is also
used for personnel lifting undergo tear down inspections on a maximum basis of once
every (3) years.
Any hoist that has NOT been subject to regular oil sample analysis must undergo a
tear down inspection on an annual (12 month) basis. Also, if a hoist has an unknown
history of repair and/or maintenance, it is highly recommended that the hoist undergo a
tear down inspection prior to being placed into service.
NOTE: Oil analysis alone cannot detect nor warn against component fatigue
failure.
A tear down inspection includes the hoist being completely disassembled, cleaned,
inspected and repaired as required. Replacement of all worn, cracked, corroded or
distorted parts, such as pins, bearings, shafts, gears, brake rotors, brake plates, drum
and base should occur as required. All seals and O-rings should be replaced at this
time.
Any deficiencies, including but not limited to those above, shall be corrected
immediately.
All of the following operations MUST be performed BEFORE the hoist is placed back
into service.
1. The rebuilt hoist MUST be line pull tested to the rated load of the hoist (hoist rating
will vary with motor, gear ratio and drum options) with a dynamometer or
