JLG 1200SJP Service Maintenance Manual page 270

SECTION 4 - BOOM & PLATFORM
29. Install a new sheave on the telescope cylinder.
30. Install the outer mid extend cables into the cable pulley
at the rod end of the telescope cylinder.
31. Install the other end of the outer mid extend cables into
the cable guide block.
4-36
32. Route the cables around the sheave on the cylinder and
install the cable retainer block.
33. Using an adequate lifting device, insert the cylinder and
cables part way into the inner mid boom.
– JLG Lift – 3121142