Tadano GR-700N, Service Manual

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Y-1 Y-1
Service Data
8
WY01-2692E
5.4 Jib bending and deformation
(1 mm = 3.93701 × 10
-2
in)
Item Standard value (mm) Remarks
Overall jib bending
(at full extension, minimum tilt angle, with rated
load)
IWY01-001001
No significant vertical or horizontal
bends shall be found along the entire
jib length.
Set the machine
level.
If necessary, adjust
the clearance
between the jib and
the slide plates
appropriately.
Bend of individual jib
sections
(Lengthwise direction)
IWY01-0010E02
B OR C
L
Ver
tic
al
Jib 1
Jib 2
Jib 3
B ≤ 10
B ≤ 9
B ≤ 9
B ≤ 1.5 × L /1000
L: length of each jib
section
Lat
er
al
Jib 1
Jib 2
Jib 3
C ≤ 7
C ≤ 6
C ≤ 6
C ≤ 1.0 × L /1000
Indentations at jib overlap
sections
(Bending at jib lower plate)
t
D
IWY01-001003
Jib 2
Jib 3 In vertical direction
D ≤ 3
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 jib 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.