John Deere 1270E Harvester Head Hydraulic Schematic Manual - PDF DOWNLOAD

Harvester Serial Number WJ1270E001658 F075960 F640578 - G1

Hydraulic Schematics John Deere Harvester 1270E (English)

Worldwide Construction And Forestry Division Published in Finland

Contents

Boom Hydraulics ............................................................................... 4 Work Hydraulics ................................................................................ 6 Work Hydraulics ................................................................................ 8 Drive Hydraulics .............................................................................. 10 Brake Hydraulics ............................................................................. 12 Options Hydraulics .......................................................................... 14 Appendix: Boom valve LS pressures ............................................ 16

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Contents

All information, illustrations and specifications in this manual are based on the latest information available at the time of publication. The right is reserved to make changes at any time without notice.

COPYRIGHT © 2008 DEERE & COMPANY Moline, Illinois All rights reserved

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BOOM HYDRAULICS

Hydraulic Schematics

Boom Hydraulics Component

Description

Position

Cylinder

Lift

100

Cylinder

Parallel

101

Cylinders

Frame steering

102

Cylinders

Boom slew

103

Cylinders

Boom tilt

105

Cylinder

Extension

106

Pilot valve

Frame steering

110

Pressure reliefs

Boom slew

111

Cylinder

Frame brake

113

Boom valve

K170 directional valve sections

120

Boom valve

L90 directional valve sections

121

Boom valve

Inlet section

122

Check valve

Counter pressure

123

Pressure reducing valve

Pilot pressure

124

Boom valve

Pilot valves

125

Orifice

Tank pressure increase

126

Measuring point

Pilot tank pressure

130

Measuring point

Pilot pressure

131

Pressure relief valve

Boom slew

135

Pressure relief valve

Boom slew

136

Pressure relief valve

Lift

137

Pressure relief valve

Lift

138

Pressure relief valve

Extension

139

Pressure relief valve

Extension

140

Pressure relief valve

Parallel

141

Pressure relief valve

Parallel

142

Pressure relief valve

Boom tilt

143

Pressure relief valve

Steering

145

Orifice

LS damping (NOTE! Only in machines with DTAC 146 solution 95235)

5

WORK HYDRAULICS

Hydraulic Schematics

Work Hydraulics Component

Description

Work pump Regulator

Position 200

Work pump's pressure difference, Delta P

Hydraulic tank

201 210

Sensor

Oil level

211

Sensor

Oil temperature

212

Bleeding screw

Oil return case

213

Breather

214

Return filters

215

Pressure switch

Return filter congestion

216

Quick coupler

Filling of hydraulic oil

217

Thermostat block

218

Thermostat valve

219

Off-line filter

220

Valve

Oil sampling

LS valve block

222 230

Measuring point

Work pressure

231

Pressure sensor

Work pressure

232

Measuring point

Optional LS-signal

233

Measuring point

Brake valve LS-signal

234

Measuring point

Boom valve LS-signal

235

Measuring point

Highest LS-signal

236

Sensor

LS-signal pressure

237

One-way orifice

LS-line

238

Shuttle valve

For optional equipment

239

Solenoid valve

Constant pressure

240

Proportional pressure relief

Constant pressure

241

7

WORK HYDRAULICS

Hydraulic Schematics

Work Hydraulics Component

Description

Auxiliary valve block

Position 250

Differential lock

Front

251

Differential lock

Rear

252

High/low gear

253

Rear wheel drive release

254

Pressure sensor

Parking brake

Hydraulic fan pump

255 260

Regulator

Fan pump max pressure

261

Regulator

Fan pump stand-by pressure

262

Measuring point

Fan pump pressure

263

Directional valve

Hydraulic fan direction

264

Hydraulic fan motor

265

Oil cooler

266

Main valve block

270

Pressure relief valve

System main relief

271

Shut-off valve

Main pressure line

272

Check valve

Harvester head

273

Valve

Frame brake

274

Pressure reducer

Frame brake

275

Pressure relief

Frame brake

276

Measuring point

Lift cylinder pressure

277

Measuring point

Frame brake pressure

278

Cylinders

Frame brake

279

Orifice

Pump stroking piston leak (NOTE! Only in machines with DTAC solution 95235)

280

9

DRIVE HYDRAULICS

Hydraulic Schematics

Drive Hydraulics Component

Description

Drive pump

Position 300

Pressure relief valve

Drive pressure

301

Pressure relief valve

Drive pressure

302

Pressure relief valve

Charge pressure

303

Pressure cut-off

Drive pump maximum pressure

304

Directional valve

Drive direction and pump displacement

305

Filter

Charge pump

306

Measuring block

Drive hydraulics

310

Measuring point

Charge pressure

311

Pressure sensor

Charge pressure

312

Measuring point

Drive pressure A

313

Pressure sensor

Drive pressure A

314

Measuring point

Drive pressure B

315

Pressure sensor

Drive pressure B

316

Drive motor

320

Pulse sensor

Drive motor

321

Directional valve

Motor displacement

322

Flushing valve

323

Pressure relief

Motor

324

Measuring point

Control pressure of Drive motor

325

Pressure cut-off

Drive motor

326

11

BRAKE HYDRAULICS

Hydraulic Schematics

Brake Hydraulics Component

Description

Brake valve

Position 400

Valve

Input unit

401

Solenoid valve

Prevents loading of brake accumulators at start

402

Regulator

14.5 … 16 Mpa (Accumulator loading)

403

Non-return valves

404

Valve

Work brake

405

Valve

Brakes

406

Pressure accumulator

407

Pressure accumulator

408

Measuring point

Accumulator for front brake

409

Measuring point

Accumulator for rear brake

410

Pressure switch

Brake charge pressure

411

Pressure switch

Brake light

412

Orifice

413

Measuring point

Braking pressure

414

Measuring point

Braking pressure

415

Brake pedal

416

Container

Brake fluid

417

Cylinders

Front axle

418

Cylinders

Rear axle

419

Valve

Cabin rotation and levelling

420

Hydraulic motor

Cabin rotation

421

Levelling cylinder

Left

422

Levelling cylinder

Right

423

Pressure accumulator

424

Pressure accumulator

425

Pressure accumulator

426

Pressure accumulator

427

Load-hold valve

428

Load-hold valve

429

Pressure accumulator

Feed pressure

430

Measuring point

Feed pressure

431

Brake

Cabin rotation

432

One-way orifice

Feed pressure accumulator

433

Pressure reducing valve

Cabin rotation and brake pressure

434

Measuring point

Cabin brake pressure

435

13

OPTIONS HYDRAULICS

Hydraulic Schematics

Options Hydraulics Component

Descriptipn

Position

Pump

Stump treatment

510

Valve

Stump treatment

511

Orifice

512

Pump

Stump streatment

520

Valve

Pressure reducing

521

Pump

Hydraulic oil filling

530

Vacuum pump

540

Check valve

Vacuum limiter

541

Solenoid valve

Vacuum pump

542

Accumulator

Lift damping (down)

560

Accumulator

Lift damping (right)

561

15

APPENDIX: BOOM VALVE LS PRESSURES