Tadano GR-700N User manual

Foreword
1
WA04-4651E
Foreword
This service manual describes the composition of the Model GR-700N-1 rough terrain crane, its adjustment
methods and hydraulic and electric circuit diagrams.
This service manual applies to the cranes with the specification numbers given below. Check the specification
number on the nameplate of your crane.
Read the separate operation and maintenance manual and the parts catalog for repair and maintenance of the
crane in conjunction with this manual. If the parts needs to be replaced, check the disassemble units and sales
units in the parts catalog before replacing them.
1. Applicable spec. and serial number
Spec. No. Applicable serial number
GR-700N-1-00101
FE0376--
GR-700N-1-00121
GR-700N-1-00122
Separate service manual
Separate Service Manual Publication No.
1 General Cautions WA01-0121E
2 Automatic Moment Limiter (AML-C) W301-0481E
3 Data Transmitter (DCU2 and VCU) W303-0681E
Please note that, for product improvement, some changes which are not
covered in this manual may have been incorporated in the machine.
And please note that this manual may cover the functions and equipment
which are not equipped with your machine.
Please check your actual machine for repair and maintenance.

Foreword
2
WA04-4651E
2. External view
The following is the traveling posture.
Front, rear, right, and left are the directions viewed from a position when operator sits on operator's seat with the
boom directed to the front of the frame. Those directions remain invariant regardless of slewing direction of the
superstructure.

Foreword
3
WA04-4651E
3. Outline of specifications
No. Item
Spec. No.
GR-700N-1
-00101
GR-700N-1
-00121
GR-700N-1
-00122
1 No. of boom sections 6
2 No. of jib stages 3
3 Single top Fitted
4 Winch
Main winch Fitted
Auxiliary winch Fitted
Winch high-speed hoisting down Fitted
Winch brake Automatic brake (Neutral brake)
5 Outrigger H-type
6 Automatic moment limiter (AML) AML-C
7 Auto. stop solenoid valve energizing type Normally energized
8 Anti-two-block device Fitted
9 Oil cooler Fitted
10 Air conditioner Fitted
11 Telematics Fitted
12 Eco mode system, Fuel consumption monitor Fitted
13 Emergency steering system Fitted
14 Engine model Cummins QSL9-4A
15 Tires 385/95 R25

Foreword
4
WA04-4651E
4. Conversion table
Length
millimeter
mm
centimeter
cm
meter
m
inch
in, ”
foot
ft, ’
mile
mi
kilometer
km
1 1×10
-1
1×10
-3
3.93701×10
-2
3.28084×10
-3
1 1.60934
1×10 1 1×10
-2
3.93701×10
-1
3.28084×10
-2
6.21373×10
-1
1
1×10
3
1×10
2
1 3.93701×10 3.28084
2.54×10 2.54 2.54×10
-2
1 8.33333×10
-2
3.048×10
2
3.048×10 3.048×10
-1
1.2×10 1
Speed
km/h mile/h, mph
1 6.21373×10
-1
1.60934 1
Area
square millimeter
mm
2
square centimeter
cm
2
square meter
m
2
square inch
in
2
square foot
ft
2
1 1×10
-2
1×10
-6
1.55×10
-3
1.07639×10
-5
1×10
2
1 1×10
-4
1.55×10
-1
1.07639×10
-3
1×10
6
1×10
4
1 1.55×10
3
1.07639×10
6.4516×10
2
6.4516 6.4516×10
-4
1 6.94444×10
-3
9.2903×10
4
9.2903×10
2
9.2903×10
-2
1.44×10
2
1
Volume
cubic centimeter
cm
3
, cc
liter
lit, L
cubic meter
m
3
cubic inch
in
3
cubic foot
ft
3
gallon (US)
gal
1 1×10
-3
1×10
-6
6.10237×10
-2
3.53147×10
-5
2.64172×10
-4
1×10
3
1 1×10
-3
6.10237×10 3.53147×10
-2
2.64172×10
-1
1×10
6
1×10
3
1 6.10237×10
4
3.53147×10 2.64172×10
2
1.63871×10 1.63870×10
-2
1.63871×10
-5
1 5.78704×10
-4
4.329004×10
-3
2.83168×10
4
2.83168×10 2.83168×10
-2
1.728×10
3
1 7.48051
3.78541×10
3
3.78541 3.78541×10
-3
2.31×10
2
1.33680×10
-1
1
Force
N kgf lbf
1 1.01972×10
-1
2.24809×10
-1
9.80665 1 2.20462
4.44822 4.53592×10
-1
1

Foreword
5
WA04-4651E
Mass
gram
g
kilogram
kg
ounce
oz
pound
lb
metric ton
t
short ton
s. t
1 1×10
-3
3.5274×10
-2
2.20462×10
-3
1×10
-6
1.10231×10
-6
1×10
3
1 3.5274×10 2.20462 1×10
-3
1.10231×10
-3
2.83495×10 2.8349×10
-2
1 6.25×10
-2
2.83495×10
-5
3.12494×10
-5
4.53592×10
2
4.53592×10
-1
1.6×10 1 4.53592×10
-4
5×10
-4
1×10
6
1×10
3
3.5274×10
4
2.20462×10
3
1 1.10231
9.07185×10
5
9.07185×10
2
3.2×10
4
2×10
3
9.07185×10
-1
1
Pressure
pascal
Pa
kPa MPa kgf/cm2lbf/in2, psi bar
1 1×10
-3
1×10
-6
1.01972×10
-5
1.45038×10
-4
1×10
-5
1×10
3
1 1×10
-3
1.01972×10
-2
1.45038×10
-1
1×10
-2
1×10
6
1×10
3
1 1.01972×10 1.45038×10
2
10
9.80665×10
4
9.80665×10 9.80665×10
-2
1 1.42233×10 9.80665×10
-1
6.89476×10
3
6.89476 6.89476×10
-3
7.03072×10
-2
1 6.89475×10
-2
1×10
5
1×10
2
1×10
-1
1.01972 1.45038×10 1
Torque
N-cm N-m kgf-cm kgf-m
foot-pound
ft-lbf
inch-pound
in-lbf
1 1×10
-2
1.01972×10
-1
1.01972×10
-3
7.37562×10
-3
8.85074×10
-2
1×10
2
1 1.01972×10 1.01972×10
-1
7.37562×10
-1
8.85074
9.80665 9.80665×10
-2
1 1×10
-2
7.23301×10
-2
8.67961×10
-1
9.80665×10
2
9.80665 1×10
2
1 7.23301 8.67961×10
1.35582×10
2
1.35582 1.38255×10 1.38255×10
-1
1 1.2×10
1.12985×10 1.12985×10
-1
1.152513 1.15213×10
-2
8.33333×10
-2
1
Power
watt
W
kW PS
1 1×10
-3
1.35962×10
-3
1×10
3
1 1.35962
7.355×10
2
7.355×10
-1
1
Centigrade-Fahrenheit
°F °C °F °C °F °C °F °C °F °C °F °C
-90 -67.78 -40 -40 10 -12.22 60 15.56 110 43.33 160 71.11
-80 -62.22 -30 -34.44 20 -6.67 70 21.11 120 48.89 170 76.67
-70 -56.67 -20 -28.89 30 -1.11 80 26.67 130 54.44 180 82.22
-60 -51.11 -10 -23.33 40 4.44 90 32.22 140 60 190 87.78
-50 -45.56 0 -17.78 50 10 100 37.78 150 65.56 200 93.33
Conversion equation: t [
°
C] = 5 (T [
°
F] -32) / 9, T [
°
F] = (9 × t [
°
C] + 160) / 5

Foreword
6
WA04-4651E
5. Drawing method of illustrations in this service manual
The third angle projection method of mechanical drawing is used for the illustrations in this service manual.
The third angle projection method is generally composed of the front view (the figure viewed from the front:
A), top view (the figure viewed from the top: B), and right-side view (the figure viewed from the right: C) as
shown below. Draw the top view immediately above the front view, and draw the right-side view on the right
side of the front view. Tridimensional shape can generally be drawn with the figures viewed from 3 directions.
For those which cannot be drawn with the figures viewed from 3 directions, the additional figures, such as
left-side view (the figure viewed from the left: D), back view (the figure viewed from the back: E), or bottom
view (the figure viewed from the bottom: F) may be used.
For other cases, when individual detailed drawing is required, an arrow view, sectional view, or detail drawing
may be used separately.
A: Front view
B: Top view
C: Right
-side view
D: Left
-side view
E: Back view
F: Bottom view

7
WA04-4651E
6. Group index
System Diagrams
Data, Adjustment and Checks
Y
Z
Y
Z

Foreword
8
WA04-4651E
7. Contents
Chapter
Section
Spec. No.
GR-700N-1
-00101
GR-700N-1
-00121
GR-700N-1
-00122
Data, Adjustment and Checks
Y
Service Data Y-1
Adjusting pressure
Hydraulic Pressure Y-2
Pneumatic Pressure Y-3
Air Bleeding Procedure Y-4
Adjusting procedure Electric Y-5
Assembly Adjustment
Crane Operation Y-6
Traveling Device Y-7
Operation Check
Crane Operation Y-8
Traveling Device Y-9
Inspection and Maintenance Y-10
System Diagrams
Z
Hydraulic Circuit Z-1
Torque Converter Circuit Z-2
Pneumatic Circuit Z-3
Electric Circuit
Upper Z-4
Lower Z-5
Hydraulic Parts Location
Diagram
Upper Z-6
Lower Z-7
Torque Converter Z-8
Pneumatic Parts Location Diagram Z-9
Electric Parts Location
Diagram
Upper Z-10
Lower Z-11
Harness
Upper Z-12
Lower Z-13
View System Z-14

i
Y
Data, Adjustment and Checks
Contents
Y-1 Service Data .....................................1
1. Amounts of oil and coolant........................ 1
2. Operating speed ....................................... 1
3. Hydraulic device ....................................... 2
3.1 Hydraulic pump .......................................... 2
3.2 Hydraulic motor .......................................... 2
3.3 Hydraulic cylinder ....................................... 3
4. Slewing section......................................... 5
5. Boom section............................................ 5
5.1 Boom slide plate ......................................... 5
5.2 Jib slide plate.............................................. 6
5.3 Boom bending and deformation ................. 7
5.4 Jib bending and deformation ...................... 8
5.5 Wire rope .................................................... 9
5.6 Sheave ..................................................... 10
5.7 Inspection of the hook block..................... 10
6. Criteria for maintenance and replacement
of vehicle ..................................... 11
6.1 Power transmission device....................... 11
6.2 Braking device .......................................... 11
6.3 Steering device......................................... 12
7. Mass table .............................................. 13
Y-2 Adjusting Pressure
(Hydraulic Pressure)..............14
1. Location (position of relief valve etc.) ...... 14
2. Items .................................................... 15
2.1 Winch ........................................................15
2.2 Telescoping...............................................16
2.3 Elevating ...................................................17
2.4 Slewing......................................................18
2.5 Outrigger ...................................................19
2.6 Remote control pilot pressure...................20
2.7 Steering.....................................................21
2.8 Torque converter oil pressure...................21
2.9 Jib tilt and jib telescoping ..........................22
2.10 Suspension lock........................................23
Y-3 Adjusting Pressure
(Pneumatic Pressure)............24
Y

ii
Y-4 Air Bleeding Procedure ................. 25
1. Hydraulic pump....................................... 25
1.1 Steering and ACC charging pump
(double gear pump)............................ 25
1.2 Main pump................................................ 25
1.3 Main pump (when the tank pressurization
tool is used) ........................................ 26
1.4 Tank pressurization tool ........................... 26
1.5 Other (cylinder)......................................... 26
2. Winch brake............................................ 27
3. Service brake.......................................... 28
4. Hydraulic motor assy .............................. 29
4.1 Slewing motor........................................... 29
4.2 Winch motor ............................................. 29
4.3 Other motor .............................................. 29
5. Winch counterbalance valve
(main and auxiliary) ..................... 30
6. Jib tilt cylinder ......................................... 30
7. Pilot circuit
(hydraulic pilot control valve) ....... 31
8. Positive control circuit ............................. 32
9. Slewing control valve
(back-pressure valve) .................. 32
10. Hydraulic valve (winch brake) ................. 33
Y-5 Adjusting Procedure (Electric)......34
1. Switch adjustment procedure .................. 34
1.1 Over-front detection switch (CN521) ........34
1.2 Boom full retraction detection switch
(CN552) ..............................................34
1.3 Jib lock pin detection switch (CN573).......35
1.4 Jib connection pin detection switch
(CN572) ..............................................35
1.5 Jib full retraction detection switch
(CN554) ..............................................36
1.6 Main wire rope length detection
(Phase A: CN525)
(Phase B: CN526)...............................37
1.7 Aux. wire rope length detection
(Phase A: CN527)
(Phase B: CN528)...............................37
1.8 Straight ahead detection switch
(CN408) ..............................................38
1.9 Rear steering lock pin IN detection
switch (CN417) ...................................38
1.10 Rear steering lock pin OUT detection
switch (CN418) ...................................38
1.11 Vehicle height detection............................39
1.11.1 Assembly adjustment..........................39
1.11.2 Switch adjustment
(front left: CN400, CN401)
(rear left: CN404, CN405)...................42
1.11.3 Switch adjustment
(front right: CN402, CN403)
(rear right: CN406, CN407).................43
Y-6 Assembly Adjustment
(Crane Operation) ..................44
1. Adjusting boom telescoping wire ropes ... 44
1.1 Adjusting boom telescoping wire ropes ....44
1.2 Adjusting boom head lower slide plate .....46
1.3 Adjusting wire rope
for 5th boom section extension...........47

iii
2. Boom clearance adjustment.................... 48
2.1 Shim adjustment at lower oblique sides
of the boom bottom ............................ 49
2.2 Shim adjustment at upper part
of the boom bottom ............................ 49
2.3 Shim adjustment at sides
of the boom bottom ............................ 50
2.4 Slide plate adjustment at lower part
of the boom head ............................... 51
2.5 Clearance adjustment at upper part
of the boom head ............................... 52
2.6 Shim adjustment at upper part
of the boom bottom ............................ 53
2.7 Clearance check at upper part
of the boom bottom ............................ 53
2.8 Clearance check at sides
of the boom bottom ............................ 54
3. Installing and adjusting anti-buckling bolts
for telescoping cylinders .............. 54
4. Bubble level adjustment.......................... 55
4.1 Leveling the slewing table plane .............. 55
4.2 Upper and lower bubble level
adjustment.......................................... 57
4.3 Adjustment check ..................................... 57
4.4 Readjustment ........................................... 57
Y-7 Assembly Adjustment
(Traveling Device).................. 58
1. Service brake adjustment ....................... 58
1.1 Adjusting the brake pedal......................... 58
1.2 Tightening the cap of reserve tank
of service brake fluid .......................... 58
1.3 Check after replacing brake hose ............ 59
2. Accelerator adjustment ........................... 59
2.1 Accelerator pedal ..................................... 59
2.2 Accelerator sensor assembly
and adjustment................................... 60
2.3 Engine speed ........................................... 62
2.4 Procedure for checking engine stall
speed.................................................. 62
3. Parking brake adjustment........................ 63
3.1 Adjusting the clearance
(between brake shoe and drum).........63
3.2 Connecting parking brake
and spring chamber ............................63
4. Tire and steering angle adjustment ......... 63
4.1 Tire size and air pressure .........................63
4.2 Adjusting the steering angle......................63
5. Torque converter and transmission ......... 64
5.1 Maximum allowable speed........................64
5.2 Adding oil to the torque converter
and transmission.................................64
6. Braking force........................................... 65
6.1 Parking brake force...................................65
6.2 Service brake force ...................................65
6.3 Auxiliary operating brake (aux. brake)
force ....................................................65
7. Adjusting headlight light axis ................... 66
7.1 Adjusting low beam ...................................66
7.2 Adjusting high beam .................................66
7.3 Procedure for adjusting light axis..............66
8. Hydraulic suspension .............................. 67
8.1 Releasing pressure in the accumulators
for hydraulic suspension .....................67
9. Retightening the hub nuts ....................... 67
10. Fuel air bleeding procedure..................... 67
11. Axle alignment adjustment procedure ..... 68
11.1 Align the axle center with frame center.....68
11.2 Align each axle using 1st axle
as datum axle .....................................69
12. Wheel alignment adjustment procedure .. 70
12.1 Work preparation ......................................70
12.2 Front wheel adjustment.............................71
12.3 Rear wheel adjustment .............................71
12.4 Checking procedure..................................71
12.5 After checking ...........................................71

iv
Y-8 Operation Check
(Crane Operation) .................. 72
1. Outrigger status indicator
by operating outrigger inside cab. 72
2. Outrigger status indicator
by lower outrigger control box...... 72
3. Boom telescoping control........................ 73
3.1 Extension.................................................. 73
3.2 Retraction ................................................. 73
3.3 Emergency telescoping ............................ 73
4. Hoisting................................................... 74
5. Backward stability control ....................... 74
6. Jib side-up function................................. 75
7. Warning .................................................. 76
8. Eco mode operation check ..................... 76
Y-9 Operation Check
(Traveling Device)..................77
1. Permanent-magnetic retarder.................. 77
2. Automatic transmission ........................... 78
3. Rear steering lock ................................... 79
3.1 Operation check A ....................................79
3.2 Operation check B ....................................80
3.3 Operation check C ....................................80
4. Overshift prevention ................................ 80
5. Warning .................................................. 81
6. Speedometer .......................................... 82
7. Emergency accelerator switch................. 82
8. Emergency transmission switch .............. 82
9. Hydraulic suspension .............................. 83
9.1 Normal operation ......................................83
9.2 Emergency operation................................85
Y-10 Inspection and Maintenance .........88

Y-1
Y-1
Service Data
1
WY01-2692E
Y-1 Service Data
1. Amounts of oil and coolant
(1L = 2.64172 × 10-1 gal)
Item
Standard
value (L)
Remarks
Amount of oil
Hydraulic
oil
Total oil capacity 930 TADANO Hydraulic Oil LL
(TADANO Genuine)
Tank capacity 620
Speed
reducer
gear oil
Slewing 3.8 Mobilgear 600XP 320 (Exxon Mobil)
Winch Main 6.1 Mobilgear 600XP 150 (Exxon Mobil)
Auxiliary 6.1
1st axle Hub section 2.9×2
Apolloil gear HE-S90 (Idemitsu)
or
Cosmo Gear GL-590 (Cosmo)
2nd and
4th axles
Carrier
differential
12×2
Planetary gear 2.6×4
3rd axle
Carrier
differential
17
Planetary gear 2.6×2
Torque converter and transmission
(total oil capacity)
38.5
TADANO Genuine Torque Converter
Oil
Brake fluid Service brake 2.1
TADANO Genuine Brake Fluid
DOT-5.1
Engine oil Engine 27
JASO Standards: DH-2 or higher
SAE15W-40
(SAE10W-30 for cold climates)
Grease 1
Daphne Eponex Grease SR No. 2
(Idemitsu)
Grease
(lower centralized lubrication distributor)
1 Nigtight LE-0 (Nippon Grease)
Fuel tank 400 Diesel fuel JIS K2204 #2
Amount of
coolant
Coolant
Total volume 45.3 (*1)
TADANO Genuine Long-life Coolant
Necessary volume of
long-life coolant
22.7 (*2)
Coolant additives
3.8
(or equivalent)
Cummins DCA4
(*1): 12.8 L (in engine), 21.8 L (in radiator), 6.0 L (in reservoir tank), 1 L (in pipe), 3 L (in oil cooler),
0.7 L (in hot-water heater) (total amount including long life coolant and coolant additives)
(*2): With mixing ratio of 50%
2. Operating speed
Item Standard value Remarks
Operating
speed
Telescoping Extending 34.2 m/124 s
Retracting ―
Elevating Raising 0° to 84°/58 s
Lowering ―
Winch rope
(hoisting up) speed
Main 131 m/min On 5th layer
Auxiliary 114 m/min On 3rd layer
Slewing 2.1 min
-1
△
0
346-605-90000
△
1
344-527-
00001
△
0
345-808-
11000
△
1
344-527-
10001
[NOTICE]
Standard values are values at time of vehicle shipment
from TADANO. Limit values are the limits at which
adjustment or part replacement is necessary.

Y-1
Y-1
Service Data
2
WY01-2692E
3. Hydraulic device
3.1 Hydraulic pump
Item Standard value Remarks
Crane pump
(double piston pump)
Speed reducing ratio 0.642
Idling (min-1) 1090 ± 31 Eng.700 ± 20 min-1 (PTO-ON)
Max. (min-1) 2414 +78
0Eng.1550 +50
0min-1 (PTO-ON)
Displacement (cm3/rev) 82 + 82
Steering pump
(double gear pump)
Speed reducing ratio 0.815
Idling (min-1) 859 ± 25 Eng.700 ± 20 min-1
Max. (min-1) 2785 ± 61 Eng.2270 ± 50 min-1
Displacement (cm3/rev) 52.2 + 13.9
Torque converter
pump
Speed reducing ratio 0.605
Idling (min-1) 1157 ± 33 Eng.700 ± 20 min-1
Max. (min-1) 3752 ± 83 Eng.2270 ± 50 min-1
Displacement (cm3/rev) 23.7
Emergency steering
pump
Displacement (cm3/rev) 14.56
3.2 Hydraulic motor
(1 L/min = 2.64172 × 10-1 gal/min)
Item Standard value Remarks
Winch
(main, auxiliary)
Displacement (cm3/rev) 127 to 195 Variable displacement pump with
auto-brakes
Drain (when running) Maximum drain: 6.5 L/min
For reference
Slewing
Displacement (cm3/rev) 169.4
Drain (when running) Maximum drain: 20 L/min For reference
△
0
345-808-
13000
△
2
366-535-
20000
△
0
366-548-60000
△
0
363-706-70000
△
0
366-545-30001
△
0
366-635-
70000
△
0
366-635-
80000
△
0
366-635-90000

Y-1
Y-1
Service Data
3
WY01-2692E
3.3 Hydraulic cylinder
(1 m = 3.28084 ft)
(1 mm = 3.93701 × 10-2 in)
Item Standard
value
Remarks
Condition and method
Safety and notice
Holding
performance
Elevating 1°or less/
2 hours
Inspection conditions
1. Boom angle: 60°±2° (Lowering operation)
2. Boom full retraction
3. Engine stop
4. No load
Inspection method
Read the variation of boom angle from the
AML display after leaving as it is for 2 hours,
or 15 hours (one night).
•Due to the holding failure
of telescoping, elevating,
or jack cylinder during
measurement, the
engine hood and carrier
cab of the vehicle, or
surrounding vehicles can
be damaged. Therefore,
hoist up the hook block
near the two-blocking
position, and set up the
crane paying attention to
boom directions.
Telescoping
0.1m or
less/
2 hours
Inspection conditions
1. Each boom section extended by
approximately 1 m (*1)
2. Boom angle: 60°±2°
3. Engine stop
4. No load
Inspection method
Read the variation of boom length from the
AML display after leaving as it is for 2 hours.
•Check the boom length on the integrated
information screen in the AML maintenance
mode. (Displays the value to the second
digit after decimal place.)
Jack
retracting
1mm or
less/
5 hours
Inspection conditions
1. Boom stowed over-front
2. Slide fully extended
3. After jack full extension and retraction
operation (approximately 10 mm), set the
crane horizontally with the jacks slightly
extended. (*2)
(If any tire is not raised off the ground while
setting the jacks, use blocks to secure the
remaining stroke.)
Inspection method
Check the displacement by measuring the
dimensions again after 5 hours.
•Set the crane considering
the possibility of
damaging the vehicle or
surrounding vehicles due
to the holding failure of
the jack cylinder during
measurement.
•Do not stick a tape on the
cylinder rod while
measuring.
(If the tape is not
removed, it may enter
inside the dust seal.)
•Pay attention not to
damage the rod when
marking the points with a
pencil.
(Depending on the shape
of the outriggers, mark
the points on a position
where the measurement
of jack inner case is easy
and secure.)
Jack
extending
1mm or
less/
5 hours
Inspection conditions
1. Boom stowed over-front
2. Slide fully retracted
3. Jack fully retracted (*2)
Inspection method
Check the displacement by measuring the
dimensions again after 5 hours.
(*1): •In the case of ESP boom, extend the 2nd boom section (telescopic section 1) by 1 m.
•When you check the machine which are equipped with telescoping mode I and telescoping mode II,
make sure to set the telescoping mode corresponding cylinder 1 or cylinder 2.
(*2): Set under the idling condition.
For models equipped with “automatic accelerate function”,
set under the condition that “automatic accelerate function” is not activated.

Y-1
Y-1
Service Data
4
WY01-2692E
Item Standard
value
Remarks
Condition and method Safety and notice
Holding
performance
Jib
tilt
1°or less/
2 hours
Inspection conditions
1. Angle lowered by 5°±2° from jib tilt angle
upper limit (minimum offset angle)
2. Boom angle: 60°±2°
3. Engine stop
4. No load
Inspection method
Read the variation of the jib tilt angle from
the AML display after leaving with no initial
retraction for 2 hours.
•Due to the holding failure
of telescoping, elevating,
or jack cylinder during
measurement, the
vehicle and surrounding
vehicles can be
damaged. Therefore,
hoist up the hook block
near the two-blocking
position, and set up the
crane paying attention to
boom directions.
Jib
telescoping
0.1m or
less/
2 hours
Inspection conditions
1. Each jib section extended by
approximately 1 m. (*3)
2. Jib offset angle: 5°±2°
3. Boom angle: 60°±2°
4. Engine stop
5. No load
Inspection method
Read the variation (retraction amount) of the
jib length from the AML display after leaving
as it is for 2 hours.
•Check the boom length on the integrated
information screen in the AML maintenance
mode. (Displays the value to the second
digit after decimal place.)
Suspension
On-rubber
10 mm or
less/
15 hours
Inspection conditions
1. Boom stowed over-front
2. Suspension locked
3. On-rubber
4. Stop the engine and turn off the power.
5. Oil temperature: normal temperature
Inspection method
Check the displacement by measuring the
dimensions again after 15 hours. •Complete the leveling.
•Mark the points for
dimension measurement
on the fender end above
the tire and on the tire.
Jack-up
30 mm or
less/
15 hours
Inspection conditions
1. Boom stowed over-front
2. Suspension locked and axle held
3. Extend the outriggers and set the machine
horizontally. (Raise the tires off the
ground.)
4. Stop the engine and turn off the power.
5. Oil temperature: normal temperature
Inspection method
Check the displacement by measuring
the dimensions again after 15 hours.
(*3): Because the jib of GR-120F is not equipped with emergency telescoping function,
fully extend the 2nd and 3rd jib sections, and extend 4th, 5th, and 6th jib sections by 1 m for each.

Y-1
Y-1
Service Data
5
WY01-2692E
4. Slewing section
(1 mm = 3.93701 × 10-2 in)
Item
Standard value
Remarks
Amount of slewing play
Horizontal play
5.0 mm or less
Vertical play
2.5 mm or less
5. Boom section
5.1 Boom slide plate
(1 mm = 3.93701 × 10-2 in)
Location used Standard
thickness (mm)
Replacement
standard (mm)
Remarks
Limit value
Base boom
section Front
Upper (on upper part of side face)
21
19
Lower (on rounded face)
18
16
2-piece
or 16 or 14
2nd boom
section
Front
Upper (on upper part of side face)
21
19
Lower (on rounded face)
18
16
2-piece
or 16 or 14
Rear
Upper (on oblique face)
49
46
Side
15
13
or 19
or 17
Lower (on rounded face)
12 - 14
10 - 12
3rd boom
section
Front
Upper (on upper part of side face)
21
19
Lower (on rounded face)
18
16
2-piece
or 16 or 14
Rear
Upper (on oblique face)
49
46
Side
15
13
or 19 or 17
Lower (on rounded face)
12 - 14
10 - 12
4th boom
section
Front
Upper (on upper part of side face)
21
19
Lower (on rounded face)
18
16
2-piece
or 16
or 14
Rear
Upper (on oblique face)
49
46
Side
15
13
or 19 or 17
Lower (on rounded face)
12 - 14
10 - 12
5th boom
section
Front
Upper (on upper part of side face)
21
19
Lower (on rounded face) 18 - 48 16 - 46 3-piece
or 18 - 46
or 16 - 44
Rear
Upper (on oblique face)
49
46
Side
15
13
or 19
or 17
Lower (on rounded face)
12 - 14
10 - 12
Top boom
section Rear
Upper (on oblique face)
49
46
Side 15 13
or 19
or 17
Lower (on rounded face)
15 - 26
13 - 24

Y-1
Y-1
Service Data
6
WY01-2692E
5.2 Jib slide plate
(1 mm = 3.93701 × 10-2 in)
Location used Standard thickness
(mm)
Replacement
standard (mm)
Remarks
Limit value
Jib 1 Front
Lower 12 9
Side - -
Jib 2
Front
Lower 12 9
Side - -
Rear
Upper corner Upper 30 27
Side 35 33
Side 15 13
Jib 3 Rear
Upper corner
Upper 25 22
Side 35 33
Side 15 13

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
Vertical
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
Lateral
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 L1 ≥50)
Generally dent G on the 4 corners
cannot be repaired.