Porter 90910, Installation, Operation And Maintenance Manual, Page: 10 / 27

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4. LINE SHAFT SUPPORTS
All support fittings, shaft and pipe splices, support rods, etc. should be inspected for fatigue
cracks, loose bolts or set screws, and corrosion, on an annual basis. Replace defective parts as
required.
5. ROLLER BRACKET SUPPORTS
Inspect all turnbuckles and “S” hook connections, making certain the hardware is all “closed”.
Alignment of the roller assembly is to be inspected for a smooth rotation of the line shaft.
6. HOISTING CABLES
Inspect all 1/8” galvanized hoisting cables for kinking or fraying, replacing as necessary.
7. CABLE DRUMS
Make certain all cable drums are secured with two (2) 5/16” x 7/16” lg. rivets or self drilling screw,
and
not just a set screw. All cable must be within the side drum plates. If any cable is winding
outside the drum on the line shaft, this is an indication of an incorrect up or down limit switch
adjustment. Refer to the limit switch section of this manual for adjustment procedure. Adjust so
that the cable has minimum build up on itself through the travel of the curtain by adjusting the
location.
8. BATTING CAGE FRAME
Inspect the batting cage frame to ensure all connections are secure and tight.
9. SUPERSTRUCTURE
Visually inspect all super structure and connections for any sign of abnormal deflection or
structural cracks. Check all hardware to confirm it is present and secure.
10. FABRIC
Inspect the net for any tears or holes in the netting. Replacement netting can be obtained through
Porter Athletic
11. UNIVERSAL JOINTS (690 CURTAIN ONLY)
Check that each universal joint is properly free to allow for proper transferring of the rotation of the
line shaft. Lubricate if necessary. Ensure all hardware is secure.