Lit. No. 21857
June 15, 2003
17
The following section contains
hydraulic and electrical schematics to
help explain how the hydraulic unit
performs the different functions. A
schematic is an abstract drawing
showing the purpose of each of the
components in the system. Each
component is represented by a
graphical symbol. The hydraulic and
electrical legends list and describe
each of the symbols used in the
schematics for this guide.
The first two schematics show a
general overview of the complete
hydraulic and electrical systems. The
remainder of the schematics have
been altered to highlight flow of
hydraulic oil and electrical current for
each function the hydraulic unit
performs or flow of electrical current
for the snowplow and vehicle lights.
•
Bold lines represent the circuit
being activated only.
•
Shaded components are either
activated or shifted from their
normal position.
NOTE:
Left side = Driver side
Right side = Passenger side
FILTER,STRAINER
DIFFUSER
COMPONENT ENCLOSURE
ELECTRIC MOTOR
CYLINDER
HYDRAULIC PUMP
FIXED DISPLACEMENT
LINE, TO RESERVOIR
BELOW FLUID LEVEL
LINES CROSSING
LINES JOINING
LINE, PILOT (FOR CONTROL)
LINE, WORKING (MAIN)
FLOW, DIRECTION OF
HYDRAULIC FLUID
SOLENOID, SINGLE WINDING
SPRING
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)
HYDRAULIC LEGEND
CROSSING WIRE
WIRE SPLICE
FUSE
SOLENOID
CIRCUIT GROUND
MOTOR RELAY
BATTERY
MOTOR
ELECTRICAL LEGEND
IN LINE CONNECTOR
WIRE CONTINUES
ELSEWHERE
LIGHT
PILOT OPERATED (P/O)
CHECK VALVE
COMPONENT ENCLOSURE
M +
HYDRAULIC AND ELECTRICAL SCHEMATICS
Wire Color Code
Abbreviations
BLK
Black
BRN/RED
Brown w/ Red
LTBLU/ORN
Light Blue w/ Orange TAN
Tan
DRL
Daytime Running Lights
BLK/ORN
Black w/ Orange DKBLU
Dark Blue
LTBLU/WHT Light Blue w/ White
VIO
Violet
MTR RLY
Motor Relay
BLK/RED
Black w/ Red
DKBLU/ORN
Dark Blue w/ Orange LTTAN
Light Tan
WHT
White
P/T SIG
Park / Turn Signal
BLK/WHT
Black w/ White
DKBLU/WHT
Dark Blue w/ White
ORN
Orange
WHT/YEL
White w/ Yellow
BLU
Blue
GRN
Green
ORN/BLK
Orange w/ Black
YEL
Yellow
BLU/ORN
Blue w/ Orange
GRY
Gray
PNK
Pink
BRN
Brown
LTBLU
Light Blue
PUR
Purple
BRN/GRN
Brown w/ Green
LTGRN
Light Green
RED
Red