7. Extend the boom to 2-3 feet (.6-1 m).
8.
Attach the guide rope to the eye on the bottom tip of the jib.
9.
Remove the left upper and lower jib mounting pins. With guide rope, pull left jib ears
out of left boom head ears.
10. With the engine at idle, slowly boom up while a second operator holds the guide rope
to control the rotating speed of the jib.
11. Boom up to approximately 30°. Allow the jib to swing around until the jib contacts the
wear pad on the boom. As the jib gets close to the side of the boom, make sure the jib
does not strike the side of the boom.
12. With the engine at idle, slowly retract the boom completely. The jib will engage the jib
storage brackets as the boom is retracted.
13. Remove the guide rope from the tip of the jib.
1 Bracket mounted to boom 2 Bracket mounted to jib
14. As the boom is retracted, verify that the stowage bracket mounted to the jib is
engaging properly with the stowage bracket mounted to the boom.
15. Rotate and release the T- handle to lock the jib to the storage brackets.
16.
Remove the right upper and lower jib mounting pins.
17. Test the anti two-block system at the boom head by lifting the anti two-block weight.
The light and audible alarms should be actuated in the cab and the boom down, boom
extend, and winch up controls should disconnect.
T300-1_T500-1_T780
Disassembly
230 P/N 12261-683
REVISED: January 2015
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