Upright LX31, Service & Parts Manual

Page: 76 / 188

Section
6-20 LX 31/41 Work Platform
Schematics
6.1
6.1 Electrical Schematics
Table 6-10: Electrical Schematic Legend, Two Wheel Drive, Diesel Model, With Outrigger Option (After S/N 1330)
REFERENCE
DESIGNATION NAME FUNCTION LOCATION
R10 Steer Left Relay Switches power to steer Lower control box,
left solenoid. second row, tenth
relay from left.
R11 Throttle Relay Switches power to throttle Lower control box,
solenoid. second row, eleventh
relay from left.
R13 Drive / Lift Relay Directs power from Lower control box,
forward (S3) and reverse (S2) first row, first relay from
switches to either forward / right.
reverse or up / down relays.
R14 Drive Relay Cuts power to forward Lower control box,
and reverse relays when first row, second relay
cutout relay is not energized from left.
and platform is elevated.
R15 Cutout Relay Cuts power to drive and Lower control box,
up relays when not first row, third relay
energized by level sensor. from left.
R16 Platform Down Relay Cuts power to series / Lower control box,
parallel relay when second row, first relay
platform is elevated, from left.
selecting high torque mode.
R17 Power Relay Switches power to all Lower control box,
solenoids and engine. first row, fourth relay
from left.
R18 Starter Relay Switches power to Power module, engine
starter. assembly.
R19 Glow Plug Relay Switches power to glow Power module, engine
plugs. assembly.
R20 Bosch
®
Throttle Relay Controls Trombetta
®
Power module, engine
throttle solenoid. assembly.
R21 Left Hand Front Switches power to Lower control box.
Extend Relay Extend Solenoid.
R22 Left Hand Front Switches power to Lower control box.
Retract Relay Retract Solenoid.
R23 Left Hand Aft Switches power to Lower control box.
Extend Relay Extend Solenoid.
R24 Left Hand Front Switches power to Lower control box.
Retract Relay Retract Solenoid.
R25 Left Hand Aft Switches power to Lower control box.
Extend Relay Extend Solenoid.
R26 Left Hand Front Switches power to Lower control box.
Retract Relay Retract Solenoid.
R27 Left Hand Aft Switches power to Lower control box.
Extend Relay Extend Solenoid.
R28 Right Hand Front Switches power to Lower control box.
Retract Relay Retract Solenoid.
R29 Pressure Switch Completes ground circuit Lower Control Module.
Override Relay to up relay when
outriggers are retracted.
R30 Upper Control Power Cuts power to upper Upper control box.
Relay controls when lower
controls are enabled.
RES1 Proportional Resistor Limits current to Lower control box.
proportional solenoid.
RES2 Glow Plugs Used when starting cold Diesel engine cylinder
engine. head.
S1 Micro Switch Supplies power to Upper control box,
controller. joystick.
S2 Reverse Micro Switch Supplies power to drive / Upper control box,
lift relay, forward / up joystick.
contacts.
S3 Forward Micro Switch Supplies power to drive / Upper control box,
lift relay, reverse / down joystick.
contacts.
S4 Interlock Micro Switch Interupts power to Upper control box,
(Deadman Switch) controlls when not inside joystick handle.
engaged.
S5 Steering Micro Switch Supplies power to steer Upper control box.
(two) left and steer right relays. inside joystick handle.
S6,7 Drive / Lift Switch Supplies Power to Upper control box,
steering micro switch to the right of joystick.
(drive) or to drive / lift
relay (lift).
S8 Torque Selector Switch Supplies power to series / Upper control box,
parallel relay. to the right of joystick.
REFERENCE
DESIGNATION NAME FUNCTION LOCATION
ALM 1 Alarm, Tilt Provides warning sound Lower control box,
when slope of machine exterior upper left side.
excedes 3 o side to side, Operated by the
or fore and aft. white wire.
ALM 2 Alarm, Down Provides warning Lower control box,
sound when deck is exterior upper left side.
lowering. Operated by red wire.
ALT Alternator Maintains current Power module, front
during operation. left side of engine.
BAT Battery Provides power for starting Control module.
engine. On left in rear of module.
D1 Diode Supplies power to down Between T10 and
relay. T11 on fanning strip.
D2 Diode Supplies power to high Between T16 and T17
speed enable circuit. on fanning strip.
D3 Diode Supplies power to high Between T17 and T18
speed enable circuit. on fanning strip.
D4 Diode Supplies power to Between T18 and T19
Throttle Solinoid. on fanning strip.
D6 Diode Supplies power to Lower control box by
power relay. power relay.
D7 Diode Supplies power to Lower control box by
power relay. power relay.
D8 Diode Supplies power to Lower control box by
drive relay. drive relay.
D9 Diode Isolates R29 coil. Lower control box.
F1 Emergency Stop Supplies Power to Lower control box
Circuit Breaker Upper Control mounted in panel,
Ignition Switch. lower right hand.
F2 Power Circuit Supplies power to Lower control box
Breaker all function solenoids. mounted in panel,
lower left hand.
L1 Drive Enable Light Indicates when power is Upper control box next to
supplied to drive circuit. drive / lift switch.
LS2 Down Limit Switch Bypasses level sensor, Under scissors, near
supplying power to front right hand side
cutout relay when platform of chassis.
is lowered.
LS3 Down Limit Switch Supplies power to drive Under scissors, near
and platform down relays, front right hand side
and high speed enable of chassis.
circuit on controller when
platform is lowered.
MOT1 Starter Motor, and Provides power to starter Left side of engine,
Solenoid motor from battery. in power module.
PS1 Oil Pressure Switch Cuts power to engine Left side of engine,
when oil pressure falls in power module.
to dangerous level.
PS2-5 Outrigger Pressure Completes ground circuit Outrigger cylinders.
Switch to up relay when outriggers
are loaded.
R1 Forward Relay Switches power to forward Lower control box,
solenoid. second row, second
relay from left.
R2 Reverse Relay Switches power to reverse Lower control box,
solenoid. second row, third
relay from left.
R3 Tilt Alarm Relay Switches power to tilt Lower control box,
alarm. second row, fourth
relay from left.
R4 Up Relay Switches power to lift Lower control box,
solenoid. second row, fifth relay
from left.
R5 Series / Parallel Relay Switches power to series / Lower control box,
parallel solenoids. second row, sixth relay
from left.
R7 Down Relay Switches power to down Lower control box,
solenoid. second row, seventh
relay from left.
R8 Down Alarm Relay Switches power to down Lower control box,
alarm. second row, eighth
relay from left.
R9 Steer Right Relay Switches power to steer Lower control box,
right solenoid. second row, ninth
relay from left.