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M6-40 Screw M6-40 ScrewPlastic Protective Collar
1. Remove the upper extension arm end cap by following the instructions in the End Cap Installa-
tion section of this manual.
2. Remove the two M6-40 screws located in front of the bearing using a 5mm metric Allen
wrench.
3. Depending on the age of the arm set, there may be access holes located on the top of the arm set.
If there are access holes, remove the rubber plugs using pliers or a at head screwdriver.
4. Using a 5mm long handle ball-end Allen screwdriver, completely loosen but do not remove the
other two M6-40 screws located at the rear of the bearing by inserting the Allen screwdriver
through the access holes and engaging the screws. To access these screws, the screwdriver will
need to be inserted at an angle.
5. If the access holes are not present, reach through the opening of the upper arm with an Allen
wrench to engage the wrench with the screws. e screws are located on the backside on each
side of the bearing.
Note ese two screws are typically hard to locate since the boom is lled with hoses,
conduit, etc. Take extra care when removing these screws. Only unthread screws
to a point where the raceway is no longer engaged to these screws. DO NOT
remove the screws from their housing, otherwise retrieval of these screws can
become dicult.
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