Section
6-8 LX 31/41 Work Platform
Schematics
REFERENCE
DESIGNATION NAME FUNCTION LOCATION
R11 Throttle Relay Switches power to throttle Lower control box,
solenoid. second row, eleventh
relay from left.
R12 Choke Relay Switches power to choke Lower control box,
solenoid. second row, twelfth
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.
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.
S9 Ignition Switch Supplies power to upper Upper control box,
controls, engine, and right side.
starter motor solenoid.
S10 Glow Plug Switch Supplies power to glow Upper control box,
plug relay. left side.
S11 Emergency Stop Cuts power to upper Upper control box,
Switch controls and engine. to the left of joystick.
S12 Engine Stop Switch Cuts power to ignition Lower control box,
module, and fuel shut-off in panel second from
solenoid. top, second from right.
S13 Starter Switch Supplies power to starter Lower control box, in
motor solenoid. panel, top, second
from right.
S15 Emergency Stop Cuts power to lower Lower control box, in
Switch controls and engine. panel, top, first from left.
S16 Chassis / Platform Supplies power to either Lower control box, in
Switch upper or lower controls. panel, second from top,
second from left.
S17 Down Switch Supplies power to down Lower control box, in
relay. panel, third from top,
first from left.
S18 Lift Switch Supplies power to up Lower control box, in
relay. panel, second from top,
first from left.
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.
D5 Diode Supplies power to Between T22 and T23
Platform Down Relay. 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.
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.
LS1 Axle Center Switch Cuts power to drive relay Front axle assembly.
when axle is not centered
while platform is elevated.
LS2 Down Limit Switch Bypasses l evel s ensor, Under s cissors, near
supplying power tocutout front right hand side
relay when platform is of chassis.
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.
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.
R6 Axle Float Relay Switches power to axle Lower control box,
float solenoid. second row, seventh
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.
R10 Steer Left Relay Switches power to steer Lower control box,
left solenoid. second row, tenth
relay from left.
6.1 Electrical Schematics
Table 6-4: Electrical Schematic Legend, Four Wheel Drive, Diesel Model (S/N: 1000-1330)
6.1
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