UM1004 | MRO-00011 05/21 Rev.0 DCO-016875
9
9.2
Overall Length (OAL) Inspection [Shoulder-to-Shoulder]
The nominal starting length of the Isolator is 36 ± 1/16 inches long when measured shoulder-to-shoulder as shown in
Figure 6. Between runs, the length can be checked using the below method. When the OAL falls near or below the
minimum, the Isolator requires a full elastomer replacement, Level II Service.
Table 9: OAL Shoulder-to-Shoulder
Nominal
36 inches
Minimum
35 inches
The anti-rotation feature should also be checked before the Isolator is run below the rotary table. To do so, attempt to
manually rotate the Isolator. If the part rotates, tear down the Isolator and ensure pins are installed and are in working
condition.
Shoulder-to-Shoulder Length
Figure 6: J-28348-64 Shoulder-to-Shoulder Length
10.0 SERVICE TOOLS
10.1 Standard Tools
The Isolator was designed to be assembled and disassembled using primarily standard tools.
Pipe wrenches shall NOT be used during assembly or disassembly of the Isolator. Additionally, torches or similar heat
generating devices shall NOT be used in an attempt to loosen joints.
Table 10: Required Standard Tools
Size
Tool Description
Service Level
1-7/8 inch
Friction Vise
Level I
1-7/8 inch
Friction Wrench
Level I
7/8 inch
Friction Wrench
Level II
7/8 inch
Locking Pliers
Level II
1-1/2 inch
Open-End Wrench/ Adjustable Wrench
Level II
Figure 7: Standard Tools