Tadano GR-700N, Service Manual

Page: 20 / 200

Y-1 Y-1
Service Data
7
WY01-2692E
5.3 Boom bending and deformation
(1 mm = 3.93701 × 10
-2
in)
Item Standard value (mm) Remarks
Overall boom bending
(at full extension, maximum elevation angle, with
rated load)
IWY01-001001
No significant vertical or horizontal
bends shall be found along the entire
boom length.
Set the machine
level.
If necessary, adjust
the clearance
between the boom
and the slide plates
appropriately.
Bend of individual boom
sections
(Lengthwise direction)
IWY01-0010E02
B OR C
L
Ver
tic
al
Base boom section
2nd boom section
3rd boom section
4th boom section
5th boom section
Top boom section B ≤ 14
B ≤ 14
B ≤ 13
B ≤ 13
B ≤ 13
B ≤ 14
B ≤ 1.5 × L /1000
L: length of each
boom section
Lat
er
al
Base boom section
2nd boom section
3rd boom section
4th boom section
5th boom section
Top boom section C ≤ 9
C ≤ 9
C ≤ 9
C ≤ 9
C ≤ 9
C ≤ 9
C ≤ 1.0 × L /1000
Indentations at boom overlap
sections
(Bending at boom lower plate)
t
D
IWY01-001003
2nd boom section
3rd boom section
4th boom section
5th boom section
Top boom section In vertical direction
D ≤ 4
D ≤ 3
D ≤ 3
D ≤ 2
D ≤ 2
In vertical direction
D
≤ t/2
Check for deformation of side plates. There must be no large deformation
particularly on the lower half surface
of side plate where pressure
concentrates.
Check for twisting in the lengthwise direction
when boom is fully extended.
E
IWY01-001004
E ≤ 5
Check for dents and other localized indentation.
1
G
Depth F
IWY01-0010E05
L
F ≤ 2
(at L
1
≥ 50)
Generally dent G on the 4 corners
cannot be repaired.