Zoomlion RT75, Operator'S Manual

Page: 172 / 178

RT75 Rough Terrain Crane
09 - 11
Max. hoist rope speed: 410 ft/min (125 m/min) (At the 4
th
layer)
Rope diameter:
Φ
0.866 in (
Φ
22 mm )
Rope length: 702ft. ( 214 m)
(3) Hook block
(a) Rotatable main hook: 83tom
（
75 t
）
, with 5 sheaves and hook latch, attached
at the chassis frame in front of the superstructure
(b) Rotatable
“
auxiliary hook
”
: 6ton
（
5.5 t
）
, with hook latch, used for with the
“
rooster sheave
”
and jib.
E. Swing mechanism
(1) The swing mechanism includes these components:
l
Hydraulic Motor
l Planetary Gear Reducer
l
Pinion Gear
l Swing Bearing
(2) Through the
“
planetary gear reducer
”
, the
“
hydraulic motor
”
causes the
“
pinion
gear
”
to turn. This causes the
“
swing bearing
” “
outer ring
”
to turn around its
“
inner
toothed ring
”
which sets on the chassis frame of the crane. This makes a
superstructure with 360
°
unlimited swing.
(3) Hydraulically controlled usually-closed brake, with a swing function that you can
control and a pneumatic swing lockout device.
Swing speed: 0.35
–
2 r/min
F. Superstructure
High-tensile steel structure with integral mounting for two winches and bolt on
counterweight.
G. Hydraulic system
(1) Oil pump
Two dual gear pumps
One supplies oil for the below uses:
l
Boom Extend / Retract
l Derrick and Hoist
The another supplies oil for the below uses:
l Outriggers
l
Swing Mechanism
l Steering System