7.
Screw the clevis socket on the cable terminal.
8.
Place the cable between the wedges and
connect the clevis socket to the crosshead
terminal with the pin.
9.
Manually move the crosshead into the rams,
making certain that the adapter attached to
each end of the ram engages its respective
guide hole in the face of the crosshead.
10.
Release the wedges, close the lid, and insert the
safety lock pin.
11.
Using chalk, masking tape, or some other
means, mark the cable a measured distance
from the wedge set. This procedure provides a
means for checking cable slippage while the
system is being pressurized.
12.
Visually inspect the socket tester to make
certain that all components are securely
attached. Do not open the choker valve during
operation of the hand pump, as this will result
in excessive pressurization of the socket tester
after the desired proof-load has been reached.
13.
Open the choker valve (20) on the hand pump,
and close the external load-release valve.
Never apply proof-loading with the lid open,
and keep hands clear of pin and crosshead area.
14.
Using the hand pump, pressurize the system to
increase the test load to 120,000 pounds. Hold
the test pressure for 2 minutes.
15.
As the pressure is gradually increased, observe
the cable for evidence of slippage. If the cable
begins to slip, proceed as follows:
a.
Relieve the pressure as in step 2.
b.
Remove the safety lock pin and open the
lid. It may be necessary to first strike the lid
with a soft mallet before it can be slid
forward to open.
c.
Retract the wedges.
d.
Remove the cable and clean it thoroughly.
e.
Clean and inspect the wedge gripping
surfaces. Replace the wedges if necessary.
f.
Lubricate the wedge sliding surfaces.
g.
Repeat proof-loading procedures
h.
Remove the cable from the socket tester
and examine the poured terminal.
REPLACING PACKINGS
The efficiency of any hydraulic equipment is
directly dependent on the proper selection, preparation
and installation of its packing. The replacement
packing shall be only those that are called out in the
assembly parts list. No substitutes or deviation in size
or number shall be made. Prior to installation, the age of
natural or synthetic rubber packing shall be checked to
determine whether these parts are acceptable for use. A
positive identification indicating the source, cure date,
and expiration date shall be made. This information
shall be available for all packing used.
The age control of all natural or synthetic packing
shall be based upon the “cure date” stamped on the
manufacturer’s unit package, intermediate package,
and shipping container. The cure date means the date of
manufacture and is designated by the quarter of the year
and year of manufacture. The cure date forms the basis
for determining the age of the V-ring, O-ring packing,
therefore, it becomes important that the cure date be
noted on all packages. Packing manufactured during
any given quarter will be considered one quarter old at
the end of the succeeding quarter. For the purposes of
explaining the coding used by manufacturers to
designate the cure date, each year is divided into
quarters as follows:
First quarter: January, February, March
Second quarter: April, May, June
Third quarter: July, August, September
Fourth quarter: October, November, December
The shelf-life control of all packing shall be governed
by
the
“expiration
date”
stamped
beside
the
manufacturer’s cure date on each package. The
expiration date is the date after which packing
CANNOT BE USED IN-SERVICE. Synthetic and
natural rubber packing and V-rings shall have a
shelf-life limit of three years (12 quarters). Synthetic
and natural rubber O-rings shall have a shelf-life limit
of five years (20 quarters). Fluorocarbon O-rings,
M83248/1-, have a shelf-life of twenty years (80
quarters). Thus, packing and V-rings shall be scrapped
if not put into service within three years after the cure
date, and O-rings shall be scrapped five years (twenty
years for fluorocarbon O-rings) after the cure date. All
packing shall be scrapped if not put into use before the
time of the expiration date.
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