 |
|||
|
|
|||
| ||||||||||
|
|  MIL-T-62531(AT)
APPENDIX A
Verification Lessons Learned
Alternations, changes or modifications that are not documented and or incorporated into the
technical data package will cause problems and delays during field installation of the balance of
the kits on order.
3.4.4 Front winch. Winch, controls, and equipment installed in accordance with applicable
drawings on vehicles requiring winches, shall be capable of retrieving disabled equipment under
all climatic conditions. The single line capacity of the winch shall be not less than ______ N on
the bare drum. The wire rope for the winch shall be not less than ______ m in continuous
length, without splice or joint, and shall be provided with a chain and hook. Rigging block shall
be in accordance with Drawing __________ and utility chain in accordance with
Drawing __________.
The winch system, consisting of the winch and the winch cable assembly, shall have a
maximum load rating based on a safety factor of not less than 3.5. The rigging block (snatch-
block) will have at least a 2.0 safety factor based on the maximum anticipated force applied to it.
Rationale
Vehicles designated for a winch will require the installation of a winch assembly with
controls which will primarily be used to retrieve disabled vehicles or other mobile equipment.
Vehicles with winches becoming mired in soft earth, mud and snow will be able to extract itself
in many instances.
The ratings of some winch systems have previously been based on the bare winch only.
With weaker components added to the winch, the system's load capacity becomes less than that
of the winch. The safety factor of the winch system then is less than one.
Guidance
Insert the required kilogram load capacity in the first blank space and the required length of
cable in meters in the second blank space. Proper installation of the winch assembly is a matter
of prime concern to assure the proper functioning of the winch and for the safety of the operator.
Great care must be given to the mounting of winch to the vehicle. Mounting bolts and nuts must
be as specified on the drawings and torqued to the specified requirements.
Lessons Learned
A malfunctioning winch, inproper installation, lack of maintenance or improper use of the
winch could result in injury or death to the operator, and/or damage to the vehicle(s) involved in
a recovery operation.
44
|
|
Privacy Statement - Press Release - Copyright Information. - Contact Us |
Click
here for thousands of PDF manuals