4-205. AERIAL LADDER TENSION CABLES
This task covers:
Tool Kit, General Mechanics, Automotive
Outriggers Extended (see para 2-14 .)
(Appendix B, Section III, Item 1)
When tightening the cables do not allow the cable take-up to
rotate as this will cause the cable to unwrap and damage the
cable and may cause serious personal injury or death.
Do not overtighten cables. Overtightening of the cables will
cause excessive wear on the cable, sheaves, bushings, and
The ladder must be adequately lubricated before any cable
adjustments are made.
To check cable alignment, extend the ladder, raise it to 60
degrees elevation, and fully retract it, then lower it back down
to 0 degrees elevation. There should be 114" to 3/4" (6.35 to
19 mm) gap between the front of the base section front
crossmember and the back of the lower mid section water
pipe flange mounting bracket. This gap should be maintained
for all the ladder sections and should not be any larger or
smaller than recommended.
Any adjusting or retensioning of the extension cables should
start on the base section extension cables.
If the ladder is retracted too far back, the front cables on the
base section should be tightened as this will draw all the
above sections outward.
Extend, elevate, the ladder, then retract and lower to see if an alignment problem still exists.
If the ladder is still misaligned the cables should again be adjusted accordingly and the test
redone to check alignment.
Once all adjustments are made to the base section the rear cables should have any excess slack
taken out of them with care not to overtighten the cables