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INTERACTIVE SCHEMATIC Bookmarks

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UENR4732 June 2013

236D, 242D, 246D, and 262D Skid Steer Loader 257D, 277D, and 287D Multi-Terrain Loader 259D, 279D, 289D, and 299D XHP Compact Track Loader Hydraulic System 236D: SEN1-UP

242D: DML1-UP

246D: JSL1-UP

257D: FMR1-UP

259D: FTK1-UP

262D: LST1-UP

277D: NTL1-UP

279D: RCX1-UP

287D: TLK1-UP

289D: A9Z1-UP

299D XHP: JST1-UP

© 2013 Caterpillar, All Rights Reserved

Printed in U.S.A.

COMPONENT LOCATION Description Accumulator GP

Models

Part Machine Schematic Number Location Location

All Models

227-8807

1

A-4

Accumulator GP - Ride Control

All Models

310-8460

2

F-7

Breather - Hydraulic Tank

All Models

258-2829

3

C-7

236D

378-0891 4

F-3

5

F-4

6

F-4

7

F-11

8

E-2

Cylinder GP - Lift

Cylinder GP - Tilt (LH) Cylinder GP - Tilt (RH)

242D/257D/259D

380-5668

246D/277D/279D

375-7845

262D/287D/289D

377-9483

299D XHP

346-3785

236D/242D/257D/259D

378-7964

All Other Models

293-5712

236D/242D/257D/259D

378-7963

All Other Models

293-5711

All Models

346-5576

236D/242D/257D/259D

388-7960

262D/287D/289D

345-5165

299D XHP Only

388-7970

9

I-2

All Models Except 299D XHP

359-7222

10

B-4

All Models

345-4755

11

F-7

Filter AS - Hydraulic and Transmission Oil Fitting GP - Quick Coupler Fitting GP - Quick Coupler (High Flow) Manifold GP - Pilot Shutoff (Two Speed) Manifold GP - Ride Control Motor GP - Hydraulic Fan (Demand)

All Models

258-2577

12

F-10

Motor GP - Hydraulic Fan (Standard)

236D/242D/257D/259D

307-3036

13

G-10

Motor GP - Hydrostat (Two Speed) (LH)

236D/242D

358-5011

14

E-15

Motor GP - Hydrostat (Two Speed) (RH)

236D/242D

358-5013

15

E-13

257D Only

373-8424 16

G-12

17

A-13

18

B-10

19

E-10

20

C-10

21

A-10

Motor GP - Hydrostat (Two Speed)

Pump GP - Hydrostat Pump GP - Implement and Charge (Standard Flow) Pump GP - Implement and Charge (High Flow)

Pump GP - Work Tool

Radiator and Hydraulic Oil Cooler GP

259D Only

373-8470

277D/287D

373-8422

279D/289D/299D XHP

373-8423

236D/242D

358-5009

236D/242D/257D/259D

258-2405

All Other Models

341-7625

236D/242D/257D/259D

373-8426

236D/242D/257D/259D

358-5002

246D/262D/277D/279D/287D/289D

423-0086

299D XHP

341-7635

236D/242D/257D/259D

258-2555

246D/262D/277D/279D/287D/289D

358-5010

236D/242D/257D/259D

345-3609

All Other Models Except 299D XHP

345-3473

299D XHP Only

345-3470

Strainer AS - Hydraulic Tank

All Models

262-5689

22

C-8

Tank GP - Hydraulic

All Models

345-4581

23

C-8

299D XHP Only

149-1397

24

J-4

All Models

373-7039

25

A-15

Tee Valve GP - Check (Cooler Bypass)

All Models

304-6756

26

E-7

Valve GP - Implement Control (Standard Flow)

236D/242D/257D/259D

373-6954

27

E-4

Valve GP - Implement Control (XHP High Flow)

299D XHP

345-5153

28

H-6

Valve GP - Loader Arms Manual Lower

All Models

112-1817

29

F-3

Valve GP - Check (Ride Control)

*If model is not listed that component will not be found on that machine

TAP LOCATION Tap Number

Description

Schematic Location

AA

Implement Pump Pressure

D-5

AA

Implement Pump Pressure

G-3

EE

Charge Pressure

A-14

MA

Main System Pressure (Pump 2 Reverse)

A-13

MB

Main System Pressure (Pump 2 Forward)

C-13

MC

Main System Pressure (Pump 1 Forward)

C-14

MD

Main System Pressure (Pump 1 Reverse)

A-14

SOS

Oil Sampling

F-11

FLUID POWER SYMBOLS BASIC COMPONENT SYMBOLS

MAIN AUX.

PUMP or MOTOR

SPRING (ADJUSTABLE)

VARIABILITY

CONTROL VALVES

SPRING

FLUID CONDITIONER

PRESSURE COMPENSATION

LINE RESTRICTION (VARIABLE)

TWO POSITION

2-SECTION PUMP

HYDRAULIC PNEUMATIC ENERGY TRIANGLES

ATTACHMENT

LINE RESTRICTION

VALVE PORTS

TWO-WAY

THREE POSITION

PUMP: VARIABLE and PRESSURE COMPENSATED

VARIABLE and PRESSURE COMPENSATED

VALVES

VALVE ENVELOPES

ONE POSITION

LINE RESTRICTION (FIXED)

RESTRICTION

FOUR-WAY

THREE-WAY

CONTROL VALVES

CHECK VALVES

AB

AB

P T NORMAL POSITION

P T SHIFTED POSITION

INFINITE POSITION

SHUTTLE

SPRING LOADED

BASIC SYMBOL

PILOT CONTROLLED

FLUID STORAGE RESERVOIRS

VENTED

RETURN ABOVE FLUID LEVEL

PRESSURIZED

RETURN BELOW FLUID LEVEL

MEASUREMENT

PRESSURE

TEMPERATURE

ROTATING SHAFTS

FLOW

UNIDIRECTIONAL

BIDIRECTIONAL

COMBINATION CONTROLS

SOLENOID

SOLENOID or MANUAL

SOLENOID and PILOT or MANUAL

SOLENOID and PILOT

SERVO

DETENT

THERMAL

MANUAL CONTROL SYMBOLS

MANUAL SHUTOFF

PUSH-PULL LEVER

RELEASED PRESSURE

EXTERNAL RETURN

SPRING LOADED

HYDRAULIC PUMPS VARIABLE DISPLACEMENT NON-COMPENSATED

PEDAL

LINES CROSSING

LINES JOINING

VARIABLE DISPLACEMENT NON-COMPENSATED

UNIDIRECTIONAL

UNIDIRECTIONAL

BIDIRECTIONAL

BIDIRECTIONAL

INTERNAL SUPPLY PRESSURE

COMPLETE

HYDRAULIC AND PNEUMATIC CYLINDERS

SINGLE ACTING

DOUBLE ACTING

INTERNAL PASSAGEWAYS

HYDRAULIC MOTORS FIXED DISPLACEMENT

SPRING

REMOTE SUPPLY PRESSURE

SIMPLIFIED

CROSSING AND JOINING LINES

GAS CHARGED

PUSH BUTTON

PILOT CONTROL SYMBOLS

INTERNAL RETURN

ACCUMULATORS

FIXED DISPLACEMENT

GENERAL MANUAL

INFINITE POSITIONING

FLOW IN ONE DIRECTION

THREE POSITION

PARALLEL FLOW

CROSS FLOW

TWO POSITION

FLOW ALLOWED IN EITHER DIRECTION

ELECTRICAL SYMBOLS Hydraulic Symbols (Electrical)

G Transducer (Fluid)

Transducer (Gas / Air)

Pressure Switch (Adjustable)

Pressure Switch

M

Generator

Electric Motor

Electrical Wire

Temperature Switch

Electrical Symbols (Electrical)

T

Pressure Symbol

Temperature Symbol

Level Symbol

Flow Symbol

Wire Number Identification Codes

Electrical Schematic Example

Hydraulic Schematic Example Current Standard

Current Standard Harness identification code This example indicates wire 135 in harness "AG".

Wire Circuit Number Identification

Wire Color

325-AG135 PK-14 325-PK Circuit Identification Number

Wire Color

Wire Gauge

Previous Standard Wire Color

Wire

325-PK-14 B Circuit Number Identification

A

Wire Gauge (EXAMPLE VALVE)

16

15

14

13

12

11

10

8

9

7

6

5

4

3

2

1

(24) TEE 149-1397 (299D XHP ONLY)

LOADER ARMS MANUAL LOWER VALVE

J

J LIFT CYLINDERS

LH TILT CYLINDER

RH TILT CYLINDER

(9) FITTING GP QUICK COUPLER (HIGH FLOW) 388-7970 (299D XHP ONLY)

I

A

A

B

B

T0 Ls

A

Pp

I

B

(28) VALVE GP IMPLEMENT CONTROL (XHP HIGH FLOW) 345-5153 (299D XHP ONLY)

H

H

(16) MOTOR GP HYDROSTAT (TWO SPEED) 373-8424 (257D ONLY) 373-8470 (259D ONLY) 373-8422 (277D/287D) 373-8423 (279D/289D/299D XHP) TWO SPEED HYDROSTAT MOTORS 257D/259D/277D/287D/279D/289D/299D XHP

(13) MOTOR GP HYDRAULIC FAN (STANDARD) 307-3036 (236D/242D/257D/259D)

G

G XHP HIGH FLOW

XHP HIGH FLOW IMPLEMENT CONTROL VALVE

A

B

LOC C-14

LOC C-14

LOC C-13

LOC C-13

LOC C-13

F FO

STANDARD FAN

FI

STANDARD FAN

DEMAND FAN

FmO

FmI

(2) ACCUMULATOR GP RIDE CONTROL 310-8460 (ALL MODELS) (11) MANIFOLD GP RIDE CONTROL 345-4755 (ALL MODELS) P

DEMAND FAN

TWO SPEED HYDROSTAT MOTORS 236D/242D

I

I

A

E X

H

SOS

A

X

Y

Y

(26) VALVE GP CHECK (RIDE CONTROL) 304-6756 (ALL MODELS)

(12) MOTOR GP DEMAND FAN HYDRAULIC FAN (DEMAND) 258-2577 (ALL MODELS) (19) PUMP GP IMPLEMENT AND CHARGE (HIGH FLOW) 358-5002 (236D/242D/257D/259D) 423-0086 (246D/262D/277D/279D/287D/289D) 341-7635 (299D XHP)

T STANDARD FLOW IMPLEMENT CONTROL VALVE

R TWO SPEED HYDROSTAT MOTOR (OTHER MODELS)

R

TWO SPEED HYDROSTAT MOTOR (236D/242D)

(14) MOTOR GP HYDROSTAT (TWO SPEED) LH 358-5011 (236D/242D)

(4) CYLINDER GP LIFT 378-0891 (236D) 380-5668 (242D/257D/259D) 375-7845 (246D/277D/279D) 377-9483 (262D/287D/289D) 346-3785 (299D XHP)

(29) VALVE GP (5) CYLINDER GP LOADER ARMS MANUAL LOWER TILT (LH) 112-1817 (ALL MODELS) 378-7964 (236D/242D/257D/259D) 293-5712 (ALL OTHER MODELS) (6) CYLINDER GP TILT (RH) 378-7963 (236D/242D/257D/259D) 293-5711 (ALL OTHER MODELS)

XHP HIGH FLOW IMPLEMENT CONTROL VALVE

X7

T

FmI

FmO

STANDARD FAN

D

P

AA

(7) FILTER AS HYDRAULIC AND TRANSMISSION OIL 346-5576 (ALL MODELS)

C

Pg

F

(8) FITTING GP QUICK COUPLER 388-7960 (236D/242D/257D/259D) 345-5165 (262D/287D/289D)

R STANDARD FLOW IMPLEMENT CONTROL VALVE

RIDE CONTROL

(27) VALVE GP IMPLEMENT CONTROL (STANDARD FLOW) 373-6954 (236D/242D/257D/259D)

1A

1B

2A

2B

3A

3B

E T

B

B1 HIGH FLOW IMPLEMENT PUMP

(15) MOTOR GP HYDROSTAT (TWO SPEED) RH 358-5013 (236D/242D)

WORK TOOL PUMP STANDARD FLOW IMPLEMENT PUMP

S1 S

L2

L1

L

HIGH FLOW IMPLEMENT PUMP

D

STANDARD FLOW IMPLEMENT CONTROL VALVE

D AA HIGH FLOW IMPLEMENT PUMP

B

X

STANDARD FLOW IMPLEMENT CONTROL VALVE

STANDARD FLOW IMPLEMENT PUMP

B1

(23) TANK GP HYDRAULIC 345-4581(ALL MODELS)

B

MB

M

B

STANDARD FLOW XHP HIGH FLOW IMPLEMENT CONTROL VALVE

C

(22) STRAINER AS HYDRAULIC TANK 262-5689 (ALL MODELS) L2

L1

WORK TOOL PUMP

B

B1

XHP HIGH FLOW IMPLEMENT CONTROL VALVE

(18) PUMP GP IMPLEMENT AND CHARGE (STANDARD FLOW) 373-8426 (236D/242D/257D/259D)

STANDARD FLOW IMPLEMENT CONTROL VALVE

XHP HIGH FLOW IMPLEMENT CONTROL VALVE

A

(3) BREATHER HYDRAULIC TANK 258-2829 (ALL MODELS)

STANDARD FLOW IMPLEMENT CONTROL VALVE

X7

TWO SPEED HYDROSTAT MOTOR (236D/242D)

M3

B

D

A

D

C

X7

C MC

TWO SPEED HYDROSTAT MOTOR (OTHER MODELS)

C MB

Pg

XHP HIGH FLOW IMPLEMENT CONTROL VALVE

WORK TOOL PUMP

(20) PUMP GP WORK TOOL 258-2555 (236D/242D/257D/259D) 358-5010 (246D/262D/277D/279D/ 287D/289D)

MC

LS

HIGH FLOW IMPLEMENT PUMP

(10) MANIFOLD GP PILOT SHUTOFF (TWO SPEED) 359-7222 (ALL MODELS EXCEPT 299D XHP)

LINE PATTERNS Pressure Line Pilot / Load Sensing Pressure Drain / Return Lines

P

Component Group Air Line

A1

CALLOUTS

T

YY

WORK TOOL PUMP

Callout Number

STANDARD FLOW IMPLEMENT PUMP

B1

EE

MD

(25) VALVE GP CHECK (COOLER BYPASS) 373-7039 (ALL MODELS)

L1

MA

(17) PUMP GP HYDROSTAT 358-5009 (236D/242D) 258-2405 (236D/242D/257D/259D) 341-7625 (ALL OTHER MODELS)

MA

L3 CI

(21) RADIATOR AND HYDRAULIC OIL COOLER GP 345-3609 (236D/242D/257D/259D) 345-3473 (ALL OTHER MODELS EXCEPT 299D XHP) 345-3470 (299D XHP)

STANDARD FAN

E

MD

DEMAND FAN

STANDARD FLOW IMPLEMENT PUMP

L2

(Machine Location from Component LocationsTable)

CO

Tap Locations Pressure and Sampling

XHP HIGH FLOW IMPLEMENT CONTROL VALVE

Tap Number

STANDARD FLOW IMPLEMENT CONTROL VALVE

(1) ACCUMULATOR GP 227-8807 (ALL MODELS)

STANDARD FLOW IMPLEMENT CONTROL VALVE XHP HIGH FLOW IMPLEMENT CONTROL VALVE

TWO SPEED PILOT SHUTOFF

A

B

Taps (Pressure, Sampling, Sensor - by letter) (52) VALVE GP - CONTROL 138-1234 Part Number

Component Name

HYDRAULIC CIRCUIT COLOR DESCRIPTIONS Schematic Location

Description

AA

Implement Pump Pressure

D-5

AA

Implement Pump Pressure

G-3

EE

Charge Pressure

A-14

MA

Main System Pressure (Pump 2 Reverse)

A-13

MB

Main System Pressure (Pump 2 Forward)

C-13

MC

Main System Pressure (Pump 1 Forward)

C-14

MD

Main System Pressure (Pump 1 Reverse)

A-14

SOS

Oil Sampling

F-11

PILOT PUMP OUTPUT MAIN PUMP OUTPUT TILT CYLINDER CIRCUIT CHARGE PUMP OUTPUT HYDRAULIC FAN CIRCUIT LOAD SENSE CIRCUIT SUPPLY LINE QUICK COUPLER CIRCUIT DRAIN / RETURN LINE STEERING CIRCUIT TRAVEL CONTROL CIRCUIT LIFT CYLINDER CIRCUIT

THIS SCHEMATIC IS FOR THE 236D, 242D, 246D, 262D, 272D, AND 272D XHP SKID STEER LOADER 257D, 277D, AND 287D MULTI-TERRAIN LOADER 259D, 279D, 289D, AND 299D COMPACT TRACK LOADER HYDRAULIC SYSTEM MEDIA NUMBER: UENR4732 SCHEMATIC PART NUMBER: 345-5170, CHANGE: 01, VERSION: Components are shown installed on a fully operable machine with the key and engine off and with parking brake set. Refer to the appropriate Service Manual for Troubleshooting, Specifications and Systems Operations. Note: Refer to the Parts Manual using a specific serial number prefix in SIS before ordering parts from this schematic.

16

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

A

RIGHT SIDE VIEW VIEW ALL CALLOUTS

24

3

AA

27

28

1 4

10 26 11 2 4

14 29 23 22 15

MB

MC

REAR VIEW VIEW ALL CALLOUTS

21

12

13

SOS

7

16

16

EE

MA

MD

17

25

FRONT VIEW VIEW ALL CALLOUTS

18 19 8

20

9

6

5