National Crane 600H, Руководство по обслуживанию

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NATIONAL CRANE
08-19-2022 Control # 092-13
4-19
600H SERVICE MANUAL BOOM
4
The fourth section should have moved out.
4. Tightening until the extension gap between the third and
fourth section is equal to the extension gap between the
second and third section.
Retraction
1. Measure the retraction gaps between the second and
third section and the third and fourth section.
If the retraction gap is greater between the third and fourth
section than the retraction gap between the second and third
section;
2. Tighten the 432 retract cable located at the front bottom
of the second section the difference in the retraction gap
measurements.
3. Extend and retract the boom a few times and then
repeat measuring the retraction gaps.
The fourth section should have moved in.
4. Tightening until the retraction gap between the third and
fourth section is equal to the retraction gap between the
second and third section.
At this time the third, second and first extendable sections
should extend and retract equally and bottom out against the
stops simultaneously.
345 and 543 cable balancing
Extension
1. Measure the extension gaps between the fourth and fifth
section and the third and fourth section.
If the extension gap between fourth and fifth section is less
than the extension gap between the third and fourth section;
2. Tighten the 345 extend cable located at the back top of
the third section the difference in the extension gap
measurements.
3. Extend and retract the boom a few times and then
repeat measuring the extension gaps.
The fifth section should move outward.
4. Tightening until the extension gap between the fifth and
fourth section is equal to the extension gap between the
fourth and third section.
Retraction
1. Measure the retraction gaps between the fourth and fifth
section and the third and fourth section.
If the retraction gap is greater between the fourth and fifth
section than the retraction gap between the third and fourth
section;
2. Tighten the 543 retract cable located at the front bottom
of the third section the difference in the retraction gap
measurements.
3. Extend and retract the boom a few times and then
repeat measuring the retraction gaps.
The fifth section should have moved in.
4. Tightening until the retraction gap between the fifth and
fourth section is equal to the retraction gap between the
fourth and third section.
At this time the all extendable sections should extend and
r e t r a c t e q u a l l y a n d b o t t o m o u t a g a i n s t t h e s t o p s
simultaneously.
4- Section Boom w/ 2 Stage Cylinder Cable Positioning
Cable Tightening Sequence 4 Section Boom with Two
Stage Extend Cylinder Boom must be in horizontal position when adjusting cable
tension (See Figure 4-9.) Retract boom fully ensuring
8860-2
FIGURE 4-9
1/2/3 EXTEND
2/3/4 EXTEND
4th STAGE
4/3/2 RETRACT
3/2/1 RETRACT
3RD STAGE
2ND STAGE
1ST STAGE
BASE
TIP
REFERENCE ONLY