Three Month Inspection; Additional Inspection Required If; Year Or 7000 Hour Replacement; Additional Replacement Criteria - JLG 600SC Service And Maintenance Manual

Three Month Inspection

1. Remove boom covers and visually (with flashlight)
inspect the ropes for rust, broken wires, frays, abuse, or
any signs of abnormalities.
2. Check wire rope tension by deflecting wire ropes by
hand. Properly tensioned ropes should have little or no
movement.

Additional Inspection Required If:

1. Machine is exposed to hostile environment or con-
ditions.
2. Erratic boom operation or unusual noise exists.
3. Machine is idle for an extended period.
4. Boom is overloaded or sustained a shock load.
5. Boom exposed to electrical arc. Wires may be fused
internally.

12 Year or 7000 Hour Replacement

1. Mandatory wire rope and sheave replacement.

Additional Replacement Criteria

NOTE: Sheaves and wire rope must be replaced as sets.
1. Rusted or corroded wire ropes.
2. Kinked, "bird caged", or crushed ropes.
3. Ropes at end of adjustment range.
4. Sheaves failing wearout gage inspection.
5. Ropes with 6 total broken wires in one rope lay, 3 in one
strand in one rope lay, 1 valley break, or 1 break at any
end termination.
3121776
SECTION 4 - BOOM & PLATFORM

4.13 WIRE ROPE TENSIONING ADJUSTMENT

Wire Rope Tensioning Procedure

1. Position boom in fully down and retracted position.
Model
Dim. A 14.6" (37.1cm)
Dim. B 9" (23cm)
B
B
Figure 4-11. Dimensions of Boom Sections
DO NOT CLAMP ON THREADS OR THREADS MAY BE DAMAGED.

DO NOT ALLOW WIRE ROPE TO ROTATE OR WIRE ROPE MAY BE DAMAGED.
CLAMP THREADED ENDS OF WIRE ROPE TO PREVENT ROTATION.
600SC 660SJC
17" (44cm)
9" (23cm)
A
MAE22850
600SC
A
MAE22840
660SJC
4-21