TM5-3810-305-10
No personnel are permitted on
the deck while rotating upper-
structure. Failure to follow this
procedure could cause DEATH
or serious injury.
Lubricate swing bearing through the grease
fitting on the inside of cab while rotating the
upperstructure.
Cable Lubrication
During fabrication, ropes receive lubrication; the
kind and amount depending on the rope’s size,
type, and anticipated use. This in-process treat-
ment will provide the finished rope with ample
protection for a reasonable time if it is stored
under proper conditions. But, when the rope is
put into service, the initial lubrication may be
less than needed for the full useful life of the
rope. Because of this possibility, periodic appli-
cations of a suitable rope lubricant are necessary.
The important characteristics of a good wire rope
lubricant are as follows:
1. It should be free from acids and alkalis.
2. It should have sufficient adhesive strength to
remain on the ropes.
3. It should be of viscosity capable of penetrat-
ing the interstices between wires and strands.
4, It should not be soluble in the medium sur-
rounding it under the actual operating condi-
tions.
5. It should have a high film strength.
6. It should resist oxidation.
l Dry cleaning solvent P-D-680
l
used to clean parts is toxic and
flammable. Use only in well
ventilated areas and avoid
contact with eyes, skin or
clothing. Do not breath vapors.
Wear the proper protective
clothing and equipment:
goggles or safety glasses, face
shield and gloves. Do not use
near sparks or open flames and
do not smoke while using it.
Failure to follow these
procedures could cause
SERIOUS INJURY.
Compressed air used for
cleaning purposes must not
exceed 30 psi (207 kPa).
Safety glasses must be used
when cleaning parts. Failure to
follow this procedure could
cause SERIOUS INJURY.
Before applying lubrication, accumulations of
dirt or other abrasive material should be removed
from the rope. Cleaning is accomplished with a
stiff wire brush and dry cleaning solvent P-D-
680, and dried with compressed air. Immediately
after it is cleaned, the rope should be lubricated.
When it is normal for the rope to operate in dirt,
rock or other abrasive material, the lubricant
should be selected with great care to make
certain that it will penetrate and, at the same
time, will not pick up any of the material through
which the rope must be dragged. As a general
rule, the most efficient and most economical
means to do cable lubrication/protection is by
using some method or system that continuously
applies the lubricant while the rope is in motion.
Many techniques are used, including the continu-
ous bath, dripping, pouring, swabbing, painting,
and where circumstances dictate, automatic sys-
tems can be used to apply lubricants either by a
drip or pressure spray method (Figure B- 1 ).
B-2
