Operation Maintenance Manual
06-2018
PN 757000-D - Revision: 17 (up to SN 138212) Power Slip PS-500
79
SE
RV
ICE
Wedge-Locking Washer specified torques
Several Wedge-Locking style bolt securing systems are
used on the PS-500 to generate safely locked bolted joints.
Regarding the fact that different sizes and grades are used
detailed information is given in the annex
(refer to section B “Third Party Documents” on page 152)
to generate safe maintenance by the user.
If the tightening torque needed to fasten a screw/nut is not
explicitly written in this manual, please check the screw/nut
head and refer to the annex in order to find the required
fastening torque:
The metric grade and make of the bolt can be seen on top
of the bolt/nut.
Fig. 100: Bolt head marking
On FORUM Handling Tools Pipe Handling Equipment
the metric grades 8.8, 10.9 and 12.9 are used and the
tightening torques can be found in refer to section B
“Third Party Documents” on page 152.
WARNING
Please pay extra attention to the method
of tightening as the tightening torques may vary on the
methods.
INFO
Resulting from tests, the Wedge-Locking style
washers were safely secured even after reuse
30 times. Make visual inspection of the washers
during every maintenance. Make sure that the
cams (cam tops) are not damaged or rounded
and that the teeth are not worn off. Lubricate
the joint and the mating surfaces if possible so
that the friction conditions Do not change. When
reassembling, care should be taken that the two
washer halves are mated correctly. If all these
criteria are met, the washers can be safely reused.
5.3
Drawing, Parts List and Spare Parts
INFO
Please contact the FORUM Handling Tools
Technical Support or one of the authorized service
companies („Contact Worldwide“ on page 12)
to order replacement parts or in the event of any
questions.
