Tadano GR-500EXL-3, Руководство по обслуживанию

Страница: 57 / 161

Y-8 Y-8
Operation Check (Crane Operation)
44
WY05-4510E
6. Boom telescoping control
[Boom length: 11.1 to 42.0 m (36.4 to 137.8 ft)]
CN503(1): Emergency telescoping switch for
3rd/top boom
CN503(2): Emergency telescoping switch for
2nd boom
CN506: 3rd/top boom extending switch
CN859: 3rd/top boom full retraction detection switch
(limit switch)
CN553: 2nd boom full retraction detection switch
(limit switch)
6.1 Telescoping mode I
Extension
Retraction
Emergency telescoping
Approximately 26.6 m (87.3 ft) boom
3rd/top boom retract.
CN859 switch: ON
2nd boom retracts.
(Even if stroke remains for the 3rd/top boom
at this time, the hydraulic valve orifice
causes them to retract fully.)
11.1 m (36.4 ft) boom (base)
Set the limited AML override switch to
“ON”.
With CN503(1) switch pressed, extend the 3rd, 4th,
and top boom by approximately 1m (3.3 ft) each.
With CN503(1) switch pressed, retract the
3rd/top boom.
With CN503(2) switch pressed, fully extend the 2nd
boom.
At this time, check that the AML displays the error
code until the boom length reaches 18.43 m
(60.5 ft).
With CN503(2) switch pressed, retract the 2nd boom.
At this time, because the No. 2 cylinder is connected to
the tank through the hydraulic valve orifice, the 3rd/top
boom may also retract.
11.1m (36.4 ft) boom (base)
Telescoping is possible only
for 2nd boom.
Boom length: 18.60 m (61.0 ft)
CN506 switch: OFF
2nd boom can be moved to the stroke
end.
(AML works on the basis of performance
with 18.80 m (61.7 ft) boom.)
CN506 switch: ON
Extension of 3rd/top boom is possible.
(When CN859 switch turns OFF, AML begins to
work on the basis of performance with 26.6 m
(87.3 ft) boom.)