Electrical & Hydraulic Schematics - Western HTS Mechanic's Manual

ELECTRICAL & HYDRAULIC SCHEMATICS
This section contains hydraulic and
electrical schematics to help explain
how the hydraulic unit performs the
diff erent functions. A schematic
is an abstract drawing showing
the purpose of each component
in the system. Each component is
represented by a graphical symbol.
The hydraulic and electrical legends
describe each symbol used in the
schematics for this guide.
The fi rst two schematics show an
overview of the complete electrical and
hydraulic systems. Other schematics
highlight the fl ow of hydraulic oil and
electrical current for each function
the hydraulic unit performs as well as
the fl ow of electrical current for the
snowplow and vehicle lights.
• Bold lines and gray lines
(ground) represent the circuit
being activated only.
• Shaded components are either
activated or shifted from their
normal position.
NOTE: Left Side = Driver's Side (DS)
Right Side = Passenger's
Side (PS)
Wire Color Code
BLK Black
BLK/ORN Black w/Orange
BLK/RED Black w/Red
BLK/WHT Black w/White
BLU Blue
Lit. No. 41467, Rev. 01
ELECTRICAL LEGEND
CROSSING WIRE
WIRE SPLICE
IN LINE CONNECTOR
FUSE
SOLENOID COIL
CIRCUIT GROUND
MOTOR RELAY
BATTERY
MOTOR
H
HEADLAMP
L
PARK/TURN LAMP
PRINTED CIRCUIT BOARD
COMPONENT ENCLOSURE
BLU/ORN Blue w/Orange GRY
BRN Brown LTBLU
BRN/GRN Brown w/Green LTGRN
BRN/RED Brown w/Red ORN
GRN Green PNK
LINE, WORKING (MAIN)
LINES JOINING
LINES CROSSING
FLOW, DIRECTION OF
HYDRAULIC FLUID
LINE, TO RESERVOIR
BELOW FLUID LEVEL
HYDRAULIC PUMP
FIXED DISPLACEMENT
CYLINDER
ELECTRIC MOTOR
FILTER, STRAINER,
DIFFUSER
COMPONENT ENCLOSURE
Gray PUR Purple
Light Blue RED Red
Light Green WHT White
Orange WHT/YEL White w/Yellow
Pink YEL Yellow
HYDRAULIC LEGEND
SPRING
SOLENOID, SINGLE WINDING
PILOT OPERATED (P/O)
CHECK VALVE
VALVE, ADJUSTABLE
PRESSURE RELIEF
VALVE, FLOW CONTROL,
ADJUSTABLE-
NON-COMPENSATED
VALVE, TWO POSITION,
TWO CONNECTION
(TWO WAY)
VALVE, TWO POSITION,
THREE CONNECTION
(THREE WAY)
VALVE, TWO POSITION,
FOUR CONNECTION
(FOUR WAY)
ORIFICE PLATE
CHECK VALVE
Abbreviations
DRL Daytime Running Lamps
MTR RLY Motor Relay
P/T SIG Park/Turn Signal
36
April 15, 2021