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Hydraulic Symbols (Electrical)

Electrical Symbols Table

325-AG135 PK-14

Circuit IdentificationNumber

Wire Color Wire Gauge

Harness identification codeThis example indicateswire 135 in harness "AG".

325-PK-14

Wire Gauge

Wire Color

Circuit Number Identification

Wire Number Identification Codes

Current Standard

Previous Standard

Electrical Schematic Example Hydraulic Schematic Example

325-PK

Wire ColorCircuit Number Identification

B A

Wire

Wire

(EXAMPLE VALVE)

Current Standard

Transducer(Fluid)

Transducer(Gas / Air)

G

Generator

Electrical WirePressure Switch

MElectric Motor

Pressure Switch (Adjustable)

Temperature Switch

PressureSymbol

TemperatureSymbol

LevelSymbol

FlowSymbol

Electrical Symbols (Electrical)

ONE POSITION TWO POSITION THREE POSITION

VENTED PRESSURIZED RETURN ABOVE FLUID LEVEL RETURN BELOW FLUID LEVEL

LINES CROSSING LINES JOINING

TWO-WAY THREE-WAY FOUR-WAY

SPRING CONTROL VALVES RESTRICTION LINE RESTRICTION(FIXED)

2-SECTION PUMP

MAIN AUX.

SPRING(ADJUSTABLE)

VARIABILITY LINE RESTRICTION(VARIABLE)

LINE RESTRICTIONVARIABLE and PRESSURE

COMPENSATED

PRESSURECOMPENSATION

PUMP: VARIABLE andPRESSURE COMPENSATED

ENERGY TRIANGLESHYDRAULIC PNEUMATIC

MEASUREMENT

PRESSURE TEMPERATURE FLOW

ROTATING SHAFTS

UNIDIRECTIONAL BIDIRECTIONAL

PUSH-PULL LEVER PEDALGENERAL MANUAL PUSH BUTTON SPRING

MANUAL CONTROL SYMBOLS

HYDRAULIC MOTORS

FIXEDDISPLACEMENT

VARIABLE DISPLACEMENTNON-COMPENSATED

UNIDIRECTIONAL

BIDIRECTIONAL

HYDRAULIC PUMPS

FLUID STORAGE RESERVOIRS

CROSSING AND JOINING LINES

VALVE ENVELOPES VALVE PORTS

BASIC COMPONENT SYMBOLS

FLUID CONDITIONERPUMP or MOTOR

FLUID POWER SYMBOLS

FIXEDDISPLACEMENT

VARIABLE DISPLACEMENTNON-COMPENSATED

UNIDIRECTIONAL

BIDIRECTIONAL

VALVES

PILOT CONTROL SYMBOLSRELEASED PRESSURE

EXTERNAL RETURN INTERNAL RETURN

REMOTE SUPPLY PRESSURE

SIMPLIFIED COMPLETE INTERNALSUPPLY PRESSURE

ACCUMULATORS

SPRING LOADED GAS CHARGED

SOLENOID or MANUAL

SOLENOID and PILOT

SOLENOID and PILOT or MANUAL

COMBINATION CONTROLS

SOLENOID SERVO THERMAL DETENT

HYDRAULIC AND PNEUMATIC CYLINDERS

DOUBLE ACTINGSINGLE ACTING

BASICSYMBOL

SPRINGLOADED

CHECK VALVES

TWOPOSITION

INFINITEPOSITIONING

FLOW IN ONEDIRECTION

FLOW ALLOWED INEITHER DIRECTION

THREEPOSITION

CROSSFLOW

PARALLELFLOW

INTERNAL PASSAGEWAYS

NORMAL POSITION

A B

P T

A B

P TSHIFTED POSITION INFINITE POSITION

CONTROL VALVES

ATTACHMENT

MANUAL SHUTOFF

SHUTTLE PILOTCONTROLLED

T

RENR4869-02July 2008

216B, 216B2, 226B, 226B2, 236B,

Hydraulic SystemSkid Steer Loaders

236B2, 246B, 232B, 232B2, 242B, 242B2, 252B, 252B2 & 262B

216B:RLL1-6799

216B2:RLL6800-UP

226B:MJH1-10574

226B2:MJH10575-UP

236B:HEN1-6749

236B2:HEN6750-UP

246B:PAT1-UP

232B:SCH1-2474

232B2:SCH2475-UP

242B:BXM1-4224

242B2:BXM4225-UP

252B:SCP1-4599

252B2:SCP4600-UP

262B:PDT1-UP

©2008 CaterpillarAll Rights Reserved

Printed in U.S.A.

HYDROSTATIC DRIVE PUMP

AA

9

10

11

12

1

2

19

25

26

31

TRAVEL SOLH416-GN975-WH

BACKUP PRESS SW120-YL321-BR

Travel Pilot Valve (10)

Implement & Charge Pump (1), Hydrostatic Pump (2),Implement Control Valve (12), A1 & A2 Solenoids (31),and Main Work Tool Pressure Tap (AA)

A2 SOLENOIDP979-YLL998-OR

A1 SOLENOIDP978-GNL998-OR

A/C SOLENOID513-OR200-BK

Motor Gp A/C (26)

Implement Pilot Valve (11)Single Speed Valve (9)

Manual Lower Ball Valve (19) & Quick Coupler Valve (25)

IMP PILOT SOLP988-OR975-WH

DETENT COILP988-OR975-WH

COUPLER SOL779-WH

2x K927-BU780-PU

SPEED SOLP981-PUL999-GN

5

20

Inline Self Level Valve - Raise (20)

Hydraulic Fan Motor (5) & SOS Port (BB)

BB

DVTR XRMTL2x F905-YL2x 200-BK

3

4 5

6

89 10

1112

14

15

13 16

1

2

17

1819

20

21

22 23

2425

2631 32

7

3

4 5

6

8

9

10 11

12

14

15

13

16

12

17 18

2021

2223

24

25

26 31 327

6

6

236/246/252/262

216/226/232/242

236/246/252/262

216/226/232/242

Description PartNumber

MachineLocation

SchematicLocation Description Part

NumberMachineLocation

SchematicLocation

Accumulator 149-0686 32 E-3

Screen 195-6768 23 F-3Solenoid - Control Valve (1&2) 185-4254 31 E-4

Coupling - Female 193-8335 13 G-3 Switch As - Back Up Alarm 192-0836 21 E-9Coupling - Male 193-8334 14 G-3 Tank GP - Hydraulic 204-1491 3 E-1 , E-2Cylinder Gp - Hydraulic Coupler 192-2640 24 F-5 , F-6 Valve - Check 123-4750 22 C-8

Valve Gp - Ball 191-9783 19 G-6

Filter Gp - Oil 223-9974 6 F-2 Valve Gp - Hydraulic Coupler 209-0640 25 F-5,6Manifold As - Drain Manifold 218-5560 7 E-5Motor Gp - A/C Compressor 218-6840 26 E-1 , F-1

Component Locations

Cooler As - Radiator (216/232)Cooler As - Radiator (226/242)Cooler As - Radiator (236/246/252/262)

280-8309280-8310280-8312

4 F-1

Pump GP - Imp & Charge (216/226/232/242)Pump GP - Imp & Charge (236/246/252/262)

269-9427238-7642 1 B-1 , C-5

Cylinder Gp - Lift Lt. Hand (216/226)Cylinder Gp - Lift Lt. Hand (232/242)Cylinder Gp - Lift Lt. Hand (236/246)Cylinder Gp - Lift Lt. Hand (252/262)

230-3683230-3703230-3685230-3705

18 G-4

Cylinder Gp - Lift Rt. Hand (216/226)Cylinder Gp - Lift Rt. Hand (232/242)Cylinder Gp - Lift Rt. Hand (236/246)Cylinder Gp - Lift Rt. Hand (252/262)

230-3693230-3703230-3695230-3705

17 G-4

Cylinder Gp - Tilt Lt.. Hand (216/226/232/242)Cylinder Gp - Tilt Lt.. Hand (236/246/252/262)

230-3684230-3687 16 G-4

Cylinder Gp - Tilt Rt. Hand (216/226/232/242)Cylinder Gp - Tilt Rt. Hand (236/246/252/262)

230-3694230-3697 15 G-4

Motor Gp - Fan (216/232)Motor Gp - Fan (226/242)Motor Gp - Fan (236/252)Motor Gp - Fan (246/262)

216-6179230-3727225-9260216-6193

5 F-1 , F-2

Motor Gp - (Single Speed) (216/226/232/242)Motor Gp - (Single Speed) (236/246/252/262)Motor Gp - (Two Speed) (236/246/252/262)

280-7854280-7856280-7858

8C,D-6 , C,D-8C,D-6 , C,D-8B,C-2 , B,C-4

Pump GP - (Single Speed) (216/232)Pump GP - (Single Speed) (226/242)Pump GP - (Two Speed) (236/246/252/262)

289-6340289-6342280-7858

2B,C-6 , B,C-8B,C-6 , B,C-8A,B-1 , A,B-4

Valve Gp - Control (216)Valve Gp - Control (226)Valve Gp - Control (232)Valve Gp - Control (242)Valve Gp - Control (236/246)Valve Gp - Control (252/262)

216-6166216-6167216-6168191-9686216-6169216-6170

12 E,F-3 , E,F-5

Valve Gp - Float Detent MagnetHandle As - A1 & A2Handle As - A1 & A2Handle As - A1 & A2 ProportionalPin - Spring - Slott

299-9119218-6118223-3725215-8307117-8683

11 F-8

Valve Gp - Inline Self Level Raise (216/226)Valve Gp - Inline Self Level Raise (232/242)Valve Gp - Inline Self Level Raise (236/246)Valve Gp - Inline Self Level Raise (252/262)

224-9408223-8408224-9418223-8418

20 G-7

Valve Gp - S-Turn Resolver BlockHandle As - Control FlowHandle As - Horn & Control FlowHandle As - Horn & Control FlowPin - Spring - Slott

299-9116218-6117218-6118223-3725117-8683

10 F-9

Valve Gp - Brake (Single Speed)Valve Gp - Brake (Two Speed)

208-5681222-3692 9 D-8

C-3

Tap LocationsPressure, Sampling, and Sensor

TapNumber Description Schematic

LocationAA Main Worktool System Pressure F-5BB SOS F-2CC Signal Pressure D-7DD Main System Pressure (Pump 1 Forward) B-3 , C-7EE Charge Pressure B-3, C-7FF Main System Pressure (Pump 2 Forward) B-3 , C-7GG Main System Pressure (Pump 2 Reverse) A-2 , B-7HH Main System Pressure (Pump 1 Reverse) A-3 , B-8

Description Media Number

Skid Steer Loaders 216B, 226B, 232B & 242B SEBP3770Skid Steer Loaders 236B, 246B, 252B & 262B SEBP3769

Specifications 216B, 226B, 232B & 242B RENR4895Testing and Adjusting 216B, 226B, 232B & 242B RENR4897Specifications 236B, 246B, 252B & 262B RENR4865Testing and Adjusting 236B, 246B, 252B & 262B RENR4867

Schematic: (Electrical System) RENR6419

Related Manuals

Parts Manual

Machine System

Electrical System

Left Forward CrossoverRelief and Makeup Valve (MB1)

Left Reverse CrossoverRelief and Makeup Valve (MA1)

Speed SensingValve

Right Reverse CrossoverRelief and Makeup Valve (MA1)

Right Forward CrossoverRelief and Makeup Valve (MB2)

Charge PressurePort (G1)

Neutral Adjustment Screw Neutral Adjustment Screw

Forward Pilot Port Forward Pilot Port

Speed SensingPressure Tap

CC

2

Charge ReliefValve

Maximum DisplacementStop

Maximum DisplacementStop

Reverse Pilot Port Reverse Pilot Port

Forward Travel DriveLoop Pressure Port (MB2)

Forward Travel DriveLoop Pressure Port (MB1)

Forward Travel DriveLoop Port

Reverse Travel DriveLoop Port

Reverse Travel DriveLoop Pressure Port (MA2)

Forward Travel DriveLoop Port

Reverse Travel DriveLoop Pressure Port (MA1)

Case DrainPort

Reverse Travel DriveLoop Port

HHGG

FF

DD

EE

Manual Lower Ball Valve (19) & Quick Coupler Valve (25)Locations shown are for 216B, 226B, 232B and 242B. Locations shown are for 236B, 246B, 252B and 262B.

COUPLER SOL779-WH

2x K927-BU780-PU

25

19

MACHINE COMPONENT LOCATIONS

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THIS SCHEMATIC IS FOR THE 216B, 216B2, 226B, 226B2, 232B, 232B2,236B, 236B2, 242B, 242B2, 252B, 252B2, 262B, 262B2SKID STEER LOADERS (Single Self-Level - Raise)PART #: 218-6462-06Components are shown installed on a fully operable machine with the key and engine off and transmission shifter in neutral.

LINE PATTERNS

Drain / Return Lines

Component Group

Pilot / Load Sensing Pressure

Pressure Line

Attachment

Air Line

CALLOUTS

Taps (Pressure, Sampling,Sensor) by letter

Components by number

YY

52

Refer to the appropriate Service Manual for Troubleshooting, Specifications and Systems Operations

HYDRAULIC CIRCUIT COLOR DESCRIPTIONSPump Output. (Left Hydrostatic)Pump Output. (Right Hydrostatic)

Supply Line.Drain / Return Line.Drive Pilot Control Circuit.Implement Pilot Control Circuit.Coupler Cylinder Control Cicuit.

Pump Output. (Implement Supply)

Lift Cylinder Control Circuit.

Pump Output. (Charge Supply)

Tilt Cylinder Control Circuit.

Parking Brake Control Circuit.Two Speed Control Circuit.

Auxiliary Tool Control Circuit.

6789

6789

A

B

C

D

E

F

G

A

C

D

E

F

G

B

12345

12345

TWO SPEED OPTION (236 / 246 /252 & 262)

T

PF PF

M

LIFTCYLINDERS

TILTCYLINDERS

AUXILIARY TOOLS

DRIVE PILOT VALVE IMPLEMENT PILOT VALVE

RIGHTLEFT

AB

L

RACKDUMP

CIMRML

COTRJ

HP

1P T 324

P T

C

A

D

B

1A 1B 2A 2B 3A 3B

DCF E

31 2 4

ED

FC

A

B

L

RIGHTMOTOR

A B

FLUSHING

Z

LEFTMOTOR

B A

FLUSHING

DRAIN

C

T P

SOS/

MAINRELIEF

AUXRELIEF

FAN MOTORRELIEF

G

C

T P

T P

C

P

C

T

MG G1

MA1

AT1R

X3 X4

R

X3

A

MA2

MB

1

GB Y B MB

2

C

T P

FWD

RF RR

X4

SPEEDSENSING

FWD

LR LF

DIAGNOSTICPORT

A1

A2

S2S1

Z

IMPLEMENT / CHARGE PUMP269-9427 (216/226/232/242)238-7642 (236/246/252/262)

HYDROSTATIC PUMP289-6340 (216/232)289-6342 (226/242)

CHECK VALVE123-4750

MOTOR - SINGLE SPEED280-7854 (216/226/232/242)280-7856 (236/246/252/262)

208-5681VALVE -SGL SPDPARKING BRAKE

PRESSURE SWITCHOPTIONAL BACK-UPALARM192-0836

299-9116 VALVE GP (S-TURN RESOLVER BLOCK CONFIG WITHOUT SWITCHES)218-6117 HANDLE AS (HORN & NO C1 & C2)218-6118 HANDLE AS (HORN & CONTINUOUS FLOW)223-3725 HANDLE AS (HORN & CONTINUOUS FLOW)117-8683 PIN - SPRING - SLOTT

299-9119 VALVE GP BASIC -B (FLOAT DETENT MAGNET)218-6118 HANDLE AS (A1 & A2 BUTTON)223-3725 HANDLE AS (A1 & A2 BUTTON)215-8307 HANDLE AS (ROLLER / A1 & A2 PROP BUTTON)117-8683 PIN - SPRING - SLOTT

VALVE GP - DIVERTER - CINLINE SELF LEVEL VALVE - RAISE

224-9408 (216/226)223-8408 (232/242)224-9418 (236/246)223-8418 (252/262)

VALVE GP - BALL191-9783

TANK GP - HYDRAULIC204-1491

MOTOR GPA/C COMPRESSOR

218-6840

COOLER ASRADIATOR

280-8309 (216/232)280-8310 (226/242)

280-8312 (236/246/252/262)

MOTOR GP-FAN216-6179 (216/232)230-3727 (226/242)225-9260 (236/252)216-6193 (246/262)FILTER GP

OIL223-9974

DRAIN MANIFOLD218-5560

VALVE GPHYDRAULIC COUPLER

233-7128

CYLINDER GPHYDRAULIC COUPLER192-2640

VALVE GP- IMPLEMENT216-6166 (216)216-6167 (226)216-6168 (232)191-9686 (242)

216-6169 (236/246)216-6170 (252/262)

ACCUMULATOR149-0686

CYLINDER GP - LIFTLEFT HAND

230-3683 (216/226)230-3703 (232/242)230-3685 (236/246)230-3705 (252/262)

CYLINDER GP - LIFTRIGHT HAND

230-3693 (216/226)230-3703 (232/242)230-3695 (236/246)230-3705 (252/262)

COUPLINGFEMALE193-8335

COUPLINGMALE193-8334

CYLINDER GP - TILTRIGHT HAND

230-3694 (216/226/232/242)230-3697 (236/246/252/262)

CYLINDER GP - TILTLEFT HAND

230-3684 (216/226/232/242)230-3687 (236/246/252/262)

DRIVE PILOT VALVE IMPLEMENT PILOT VALVE

SCREEN195-6768

HH GG

DD EEFF

CC

AA

BB

REVERSE

NEUTRAL NEUTRALNEUTRAL NEUTRAL

FORWARD LOWER RAISE

COUPLER

SOLENOID(A1 & A2)185-4254

MOTOR - SINGLE SPEED280-7854 (216/226/232/242)280-7856 (236/246/252/262)

M

MG G1

MA

AT1R

X3 X4

R

X3

A

MA

MB

GB Y B MB

FWD

RF RR

X4

SPEEDSENSING

FWD

LR LF

TO DRIVE JOYSTICKTO DRIVE JOYSTICK

TO HYDRAULIC TANK

TO IM

PLE

ME

NT

VALV

E

TO F

AN

MO

TOR

PF PF

T

TO C

HA

RG

E F

ILTE

R

TO D

RIV

E P

ILO

T

TO IMPLEMENT VALVETO DRAIN MANIFOLD

LEFTMOTOR

TO D

RA

IN M

AN

IFO

LD

TO DRAIN MANIFOLD

TO D

RA

IN M

AN

IFO

LD

RIGHTMOTOR

DD EEFF

HH GG

BAFFLE

DEMAND FANMOTOR RELIEF

DEMAND FAN269-9467 (226/242/246/262)

HYDROSTATIC PUMP289-6351 (236/246/252/262)

MOTOR GP - TWO SPEED280-7858 (236/246/252/262)

VALVE GP - TWO SPEED293-6591(236/246/252/262)

B

A

L