National Crane Published 10-30-2014 Control # 040-09 5-29
1400H OPERATOR AND SERVICE MANUAL SERVICE
d. If the fifth section is bottoming out first, equally
loosen the 5/4/3 retract cables and tighten the 3/4/5
extend cables. This will cause the fifth section to
bottom out later and the second, third and fourth
sections to bottom out sooner.
11. Cycle the boom a few feet out and in. Check to ensure
that all sections are bottoming out simultaneously.
Repeat step 10 as required.
12. Repeat Steps 4 through 9. Torque the 5/4/3 retract
cables to 12 lb-ft (16,26 Nm). Torque the 3/4/5 extend
cables to 30 lb-ft (40 Nm). Torque the 4/3/2 retract
cables to 14 lb-ft (19 Nm). Torque the 2/3/4 extend
cables to 45 lb-ft (61 Nm). Torque the 3/2/1 retract
cables to 18 lb-ft (24 Nm). Torque the 1/2/3 extend
cables to 14 lb-ft (19 Nm).
13. Cycle boom fully, check that all cables are torqued
properly and that all sections are bottoming out
simultaneously. Repeat step 10 as required then add
locknuts to all cables. Each threaded cable end must
have two nuts locked together.
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