Upright TL33 - 6.2 Hydraulic Schematic

6-7
TL33 Work Platform
Schematics
Section
6.2
6.2 Hydraulic Schematic
Table 6-2: Hydraulic Schematic Legend
REFERENCE
DESIGNATION
NAME FUNCTION LOCATION
CYL1 Lower boom lift cylinder Provides the force to lift lower boom Foward of first post
CYL2 Upper boom lift cylinder Provide the force to lift upper boom Behind second post
FL1 Return line filter (10 Micron) Continuously filters hydraulic return
oil. Contains integral bypass which
operates when return line oil
pressure exceeds 1.7 Bar.
Between chassis runners
behind slew bearing.
MMB Main manifold block Contains the directional control
valves and relief valves that
distribute oil to the various functions
and control the operating pressures,
On rear of first post under
glass reinforced plastic
cover.
MOT1 Slew Motor Coupled to a gearbox it drives the
slew bearing via a pinion gear.
Forward of first post on
base plate
MP Motor/Pump set Gear pump close coupled to D.C
electric motor. Provides pressurised
oil flow for all hydraulic functions.
One section of pump not used and
pumps oil straight back to tank. The
other section delivers approx. 13
L/min at 100% motor speed.
On chassis under motor
control unit.
RV1 Main relief valve Sets max system pressure to 155
Bar.
On main manifold block
V1 Single overcentre valve Prevents back flow and provides
hydraulic lock on cylinder
On base of upper, lower
cylinders
V2 Emergency lowering valve Allows upper and lower boom to be
manually lowered
On base of upper and lower
cylinders
V3,V4,V5,V6 Direction control valves Sends oil to annular or full bore
sides of the lift cylinders and to the
left or right side of the slew motor.
On main manifold block.