Section
6-26
LX 31/41 Work Platform
Schematics
Table 6-13: Hydraulic Schematic Legend, Two Wheel Drive Model
6.2 Hydraulic Schematics
REFERENCE
DESIGNATION
NAME
FUNCTION
LOCATION
CV1
Drive Make-up Check
Prevents cavitation of down
Inline valve located
stream motor when turning
bottom of manifold.
CV2
Sense Line Check
Not Used
Not servicable
CYL1
Steering Cylinder
Actuates steering linkage
Front axle assembly
to steer front wheels.
CYL3
Lift Cylinder
Actuates scissor linkage
Scissor assembly
to elevate platform.
CYL4,5
Brakes, Multi-disc
Parking brakes, spring
Rear axle assembly
applied, hyd. release.
MOT 3,4
Rear Drive Motors
Drive the rear wheels.
Rear axle assembly
ORF1
Steering Orifice
Limits the oil flow to the
Under stack valve SV2
steering cylinder.
between steer valve
(V1) and manifold.
ORF2
Down Orifice
Limits the descent speed
Under down valve
of the platform.
(V12).
ORF3
Brake Orifice
Allows brakes to release
Left side top of manifold
quickly and apply slowly.
under fitting in port 12.
P1
Hydraulic Pump
Provides fluid power for
Power module, engine
hydraulic system.
assembly.
P2
Brake Release Pump
Used to release brakes
Near rear axle assembly
when machine is towed.
outside housing.
RV1
Right Steer Relief Valve
Provides overpressure
Front of manifold, port
protection for steering
marked 'A'.
components.
RV2
Left Steer Relief Valve
Provides overpressure
Front of manifold, port
protection for steering
marked 'B'.
components.
RV3
Lift Relief Valve
Limits maximum load
Front of manifold port
of elevating assembly.
marked 'I'.
RV4,5
Bi-Directional Relief
Allows oil flow to bypass
Underneath each rear
Valves
drive motors when
drive motor.
turning on tight radius.
SV1
Sense Line Shuttle Valve Not used.
Not serviceable.
SV2
Sense Line Shuttle Valve Allows pilot pressure to
Stack valve located
pump sense line from
between steering valve
steering.
(V1) and manifold.
SV3
Drive Shuttle Valve
Allows oil pressure from
Not serviceable.
drive to release brakes.
6.2
REFERENCE
DESIGNATION
NAME
FUNCTION
LOCATION
V1
Steering Valve
Controls oil flow to
Top of manifold, ports
steering cylinder (CYL1).
marked 'D'.
V3
Proportional Valve
Regulates oil flow to lift and Right side of manifold,
drive functions.
port marked 'G'.
V4
Lift Valve
Allows oil flow to lift
Right side of manifold,
cylinder (CYL3).
port marked 'J'.
V5
Forward Valve
Allows oil flow to drive
Right side of manifold
system in forward, allows
port marked 'K'.
return oil flow from drive
system in reverse.
V6
Reverse Valve
Allows oil flow to drive
Right side of manifold
system in reverse, allows
port marked 'L.
return oil flow from drive
system in forward.
V7
Forward Counter-
Provides dynamic braking
Left side ofmanifold,
balance Valve
for machine in reverse
port marked 'N'.
and prevents runaway on
slopes.
V8
Reverse Counter-
Provides dynamic braking
Left side ofmanifold,
balance Valve
for machine in forward
port marked 'O'.
and prevents runaway on
slopes.
V9,10
Series / Parallel Valves
Directs oil flow to drive
Front of manifold,
motors in either series
ports marked 'R' & 'Q'.
(for higher speed) or
parallel (for higher torque)
configuration.
V11
Devider / Combiner
Equalizes oil flow from
Front of manifold, port
Valve
front and rear drive
marked 'P'.
motors when in parallel
(High Torque) configuration.
V12
Down Valve
Holds oil in lift cylinder
Base of lift cylinder,
(CYL3) when deck is
(CYL3).
elevated. Allows oil to
flow out of cylinder when
deck is lowering. This
valve has a cable actuated
manual override for
emergency lowering.
Note: See figure 6-19 for hydraulic valve locations.
Содержание LX31
Страница 1: ...Publication Number 067904 000 ...
Страница 4: ...LX 31 41 Work Platform ii Foreword NOTES ...
Страница 33: ...Section 4 11 LX 31 41 Work Platform Maintenance Figure 4 12 Hydraulic Manifold Exploded View 4WD Shown 4 7 ...
Страница 56: ...Section Troubleshooting 5 4 LX 31 41 Work Platform 5 1 NOTES ...
Страница 83: ...Schematics Section LX 31 41 Work Platform 6 27 6 2 Figure 6 13 Hydraulic Schematic Two Wheel Drive Model ...
Страница 85: ...Schematics Section LX 31 41 Work Platform 6 29 6 2 Figure 6 14 Hydraulic Schematic Four Wheel Drive Model ...
Страница 91: ...Schematics Section 6 35 LX 31 41 Work Platform Figure 6 19 Hydraulic Manifold 6 3 ...
Страница 92: ...Section 6 36 LX 31 41 Work Platform Schematics 6 3 NOTES ...
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Страница 187: ...Call Toll Free in U S A 1 800 926 LIFT ...