Y-1
Y-1
Service Data
3
WY01-2930E
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.
Summary of Contents for GR-500EXL-3
Page 1: ......
Page 8: ...7 WA04 4610E 6 Group index System Diagrams Data Adjustment and Checks Y Z Y Z...
Page 102: ...Z 7 Z 7 Hydraulic Parts Location Diagram Lower 31 WZ07 3950E 2 Steering 2 346 418 02000...
Page 108: ...37 WZ08 0590E Z 9 Z 9 Pneumatic Parts Location Diagram 3 Control parts lower 4 349 232 60000...
