Table 5-1: Electrical Schematic Legend: Diesel (064149-079) - Upright SL30SL Service & Parts Manual

Section
5.1
5.1 E S
LECTRICAL
DESIGNA
NAME
TION
ALM1 Alarm, Down Provides warning sound when deck
is lowered.
ALM2 Alarm, Tilt Sounds audible warning when
platform is elevated and not level
ALT Alternator Maintains battery charge while
engine is running
BAT Battery, 12 Volt Stores energy
CO1 Coil, Throttle Controls engine RPM
CO2 Coil, Run Shuts off fuel flow
D1 Diode Supplies power to Drive Relay
D2 Diode Supplies power to Drive Relay
D3 Diode Supplies power to throttle
D4 Diode Supplies power to throttle
D5 Diode Supplies power to down circuit
D6 Diode Supplies power to down circuit
D7 Diode Supplies power to joystick terminal Fanning Strip
D8 Diode Supplies power to joystick terminal Fanning Strip
D9 Diode Supplies power to Controller Relay Upper Controls
D10 Diode Supplies power to Drive Relay
D11 Diode Provides power to Drive Relay
D12 Diode Supplies power to Steer Bypass
D13 Diode Supplies power to Steer Bypass
D14-17 Diodes Supplies power to Steer Bypass
D18 Diode Supplies power to Platform Level
circuit when platform is down
D19 Diode Prevents power from keyswitch S14
from energizing terminal strip B
D20 Diode Supplies power to Choke Switch
S17
F1 Fuse, 15 Amp Overload protection for control
circuit
F2 Fuse, 15 Amp Overload protection for control
circuit
HM Hour Meter Tracks hours machine has been in
operation.
LS1 Limit Switch, Energizes platform down relay,
Platform Down providing power to joystick
LS2 Limit Switch, Provides power to Cushion Valve
Cushion Down during last 6 in. of lowering
LS3 Limit Switch, Axle Supplies power to Drive Relay
Center when platform is elevated.
PS1 Pressure Switch, Cuts power to engine when oil
Engine Oil pressure falls to dangerous levels
PS3 Pressure Switch, Lift Cuts power to high speed circuit
and Axle Float Solenoid when there
is pressure in the lift circuit
R1 Relay, Platform Provides power to Series/Parallel
Down and Down Valves and Cutout Relay
5-2
, SL26/30SL
CHEMATIC

Table 5-1: Electrical Schematic Legend: Diesel (064149-079)

FUNCTION LOCATION
Control Module
Control Module
Power Module
Power Module
Engine
Engine
Fanning Strip
Fanning Strip
Fanning Strip
Fanning Strip
Fanning Strip
Fanning Strip
On Drive Relay R3
Upper Controls
Fanning Strip
Fanning Strip
Fanning Strip
On Down Relay R1
On keyswitch S14
Upper Controls
Control Module
Control Module
Control Module
Elevating Assembly at
Lift Cylinder
Mounted to lower
tension member
Mounted behind left
front axle
Power Module
Valve Manifold
Control Module
S
CHEMATICS
DESIGNA
NAME
TION
R2 Relay, Cutout
R3 Relay, Drive
R4 Relay, Throttle
R5 Relay, Drive/Lift
R6 Relay, Run
R7 Relay, Controller
R8 Relay, Start
R9 Relay, Starter
R10 Relay, Glow Plug
RES1 Glow Plugs
S1 Switch, Interlock
Lever (Trigger)
S2 Switch, Down/
Reverse
S3 Switch, Lift/Forward Provides power to lift and forward
S4,5 Switch, Steering
S6 Switch, Emergency
Stop (Upper)
S7 Switch, Key
S8 Switch, Drive/Level/
Lift
S9 Switch, Torque
Selector (Drive/Lift
speed)
S10 Switch, Emergency
Stop (Lower)
S11 Switch, Chassis Lift Supplies power to Up and
S12 Switch, Tilt Fore/Aft Provides power to Tilt Fore or Aft
S13 Switch, Tilt Right/
Left
S14 Switch, Platform/
Chassis
S15 Switch, Platform
Down Limit
S16 Switch, Drive Cutout Disables drive function when
S17 Switch, Glow Plug
FUNCTION
Provides power to Drive Relay thru Control Module
Axle Center Switch and closes Lift
circuit when energized by Platform
Down Relay
Energized by Platform Down Relay Control Module
when platform is down or by Cutout
Relay thru Axle Center Switch
Provides power to the Throttle Control Module
Solenoid to increase RPM
Provides power to forward or Control Module
reverse coils when not energized
Provides power to Run Solenoid Control Module
thru Oil Pressure Switch
Provides power to the joystick "+" Upper Controller
terminal
Engages Starter Relay Power Module
Connects battery to starter motor Starter Motor
Provides power to Glow Plugs Power Module
Aids starting engine when cold Power Module
Enables lift/drive/level functions Upper Controls
when depressed
Provides power to down and Upper Controls
reverse circuits when actuated
Upper Controls
circuits when actuated
Provides power to steer left/right Upper Controls
circuits when actuated with thumb
rocker switch on joystick
Cuts power to control circuits Upper Controls
Supplies power to controls and Upper Controls
engine
Supplies power to selected circuits Upper Controls
Provides power to Series/Parallel Upper Controls
Valves to provide high speed drive/
lift
Cuts power to control circuits Lower Controls
Lower Controls
Proportional coils or down circuit
Upper Controls
Coils to level platform
Provides power to Tilt Right or Left Upper Controls
Coils to level platform
Toggles power between platform Lower Controls
controls and lower controls
Prevents Lift Cylinder from Upper Controls
bottoming out on down stroke
Elevating Assembly at
platform is above 8 meters Lift Cylinder
Engages glow plugs to aid starting Upper Controls
engine when cold
SL26/30SL Work Platform
LOCATION