5-4
SL26/30SL Work Platform
S
CHEMATICS
Section
5.2
5.2 H
YDRAULIC
S
CHEMATIC
, SL26/30SL
Table 5-2: Hydraulic Schematic Legend (064148-022)
DESIGNA
TION
NAME
FUNCTION
LOCATION
BR1
Brake, Multi-disc
Parking brake
Right rear wheel
BR2
Brake, Multi-disc
Parking brake
Left rear wheel
CV1
Check Valve, Brake
Allows free flow of oil from brakes
around pressure reducing valve
Valve Block
CV2
Check Valve, Lift
Prevents oil from leaking through
Lift Valve
Valve Manifold
CV3,4
Check Valves, Axle
Float Cylinder
Locks Axle Float Cylinder when
platform is elevated
On Axle Float
Cylinder
CV5-8
Check Valves, Tilt
Cylinder
Locks Tilt Cylinder to prevent
motion when platform is elevated
On Tilt Cylinder
CYL1
Cylinder, Steering
Provides force to steer front wheels Front of chassis
CYL2
Cylinder, Lift
Provides force to Lift Platform
Between chassis
pedestal weldment
and lower arm weld’t
CYL3
Cylinder, Axle Float Locks front axle when platform is
elevated
Front axle
CYL4
Cylinder, Fore/Aft
Tilt
Provides front and rear leveling of
platform
Rear of elevating
assembly
CYL5
Cylinder, Side/Side
Tilt
Provides right and left leveling of
platform
Right rear of elevating
assembly
FD1
Flow Divider,
Steering
Diverts oil to Steering Valve
Valve Manifold
FD2
Flow Divider,
Combiner
Allows positive traction in parallel
drive
Valve Manifold
FD3
Flow Divider, Tilt
Diverts oil for platform leveling
Auxiliary Valve
Manifold
FL1
Filter
Filters oil returning to tank.
Top of hydraulic tank
FL2
Filter, Suction
Screen
Traps particles in hydraulic tank
Inside hydraulic tank,
at outlet.
MOT1
Motor, Drive
Drives left rear wheel
Left rear axle
MOT2
Motor, Drive
Drives right front wheel
Left front axle
MOT3
Motor, Drive
Drives right rear wheel
Right rear axle
MOT4
Motor, Drive
Drives right front wheel
Right front axle
ORF1
Orifice, Down
Controls the platform rate of
descent
Valve Manifold
ORF2
Orifice, Cushion
Down
Slows the platform rate of descent
during the last 12 in. (300mm) of
platform lowering
Cushion Valve Block
P1
Pump, Hydraulic
Provides fluid power for hydraulic
system
Rear of engine
P1
Pump, Brake
Release
Release Brakes Manually
Rear of Chassis
RV1
Relief Valve, Main
Provides overpressure protection to
Pump
Valve Manifold
RV2
Relief Valve,
Steering
Provides overpressure protection to
steering components
Valve Manifold
RV3
Relief Valve, Rear
Drive Cross
Provides overpressure protection to
drive motors during turning
Mounted behind
hydraulic tank
RV4
Relief Valve, Front
Drive Cross
Provides overpressure protection to
drive motors during turning
Mounted behind
hydraulic tank
RV5
Relief Valve, Fore/
Aft Tilt
Provides overpressure protection
for forward leveling
Auxiliary Valve
Manifold
SV1
Shuttle Valve
Provides oil to brakes when either
drive FORWARD or REVERSE are
actuated.
Valve Manifold
V1
Valve, Steering
Provides directional control for
Steering Cylinder
Valve Manifold
V2
Valve, Forward
Counterbalance
Prevents machine from running
away on slopes and also cushions
stops
Valve Manifold
V3
Valve, Reverse
Counterbalance
Prevents machine from running
away on slopes and also cushions
stops
Valve Manifold
V4
Valve, Forward
Provides directional control of oil for
forward drive
Valve Manifold
V5
Valve, Reverse
Provides directional control of oil for
reverse drive
Valve Manifold
V6
Valve, Velocity Fuse Locks Lift Cylinder if line breaks
Lift Cylinder
V7
Valve, Lift
Provides oil flow to Lift Cylinder
Valve Manifold
V8
Valve, Down
Allows oil to flow out of Lift Cylinder
to tank
Valve Manifold
V9
Valve, Proportional
Prevents oil from bypassing while
driving or lifting
Valve Manifold
V10
Valve, Brake
Release
Allows use of brake release pump
by closing return circuit
On front of brake
release pump assy.
V11
Valve, Axle Float
Allows Axle Cylinder to float when
energized, locks Axle Cylinder
when not energized
Mounted on side of
hydraulic tank
V12,13
Valves, Series/
Parallel
Shifting both valves changes the oil
flow from hight torque (parallel) to
high speed (series).
Valve Manifold
V14
Valve, Brake
Pressure Reducing
Drops system pressure to 390 psi
(27 bar) for proper Brake operation
Valve Manifold
V15
Valve, Cushion
Down
Closes to send oil thru Cushion
Down Orifice, slowing platform rate
of descent for the last 12 in.
(305mm)
Valve Manifold
V16
Valve, Steering
Dump
Directs oil to platform leveling or
steering valves
Auxiliary Valve
Maniold
V17
Valve, Fore/Aft Tilt
Provides direction control of oil for
fore/aft platform leveling
Auxiliary Valve
Manifod
V18
Valve, Side/Side Tilt Provides direction control of oil for
side/side platform leveling
Auxiliary Valve
Manifod
DESIGNA
TION
NAME
FUNCTION
LOCATION
Summary of Contents for SL26SL
Page 1: ...European Specification ...
Page 4: ...ii SL26 30SL Work Platform FORWARD NOTES ...
Page 12: ...1 4 SL26 30SL Work Platform INTRODUCTION SPECIFICATIONS Section 1 3 NOTES ...
Page 24: ...2 12 SL26 30SL Work Platform MACHINE PREPARATION OPERATION Section 2 13 NOTES ...
Page 48: ...4 6 SL26 30SL Work Platform TROUBLESHOOTING Section 4 2 NOTES ...
Page 54: ...5 6 SL26 30SL Work Platform SCHEMATICS Section 5 2 NOTES ...
Page 59: ...SL26 30SL Work Platform 6 5 ILLUSTRATED PARTS BREAKDOWN 6 1 NOTES ...
Page 63: ...SL26 30SL Work Platform 6 9 ILLUSTRATED PARTS BREAKDOWN 6 1 NOTES ...
Page 65: ...SL26 30SL Work Platform 6 11 ILLUSTRATED PARTS BREAKDOWN 6 1 ...
Page 67: ...SL26 30SL Work Platform 6 13 ILLUSTRATED PARTS BREAKDOWN 6 1 ...
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