Danfoss EH Series Bedienungsanleitung

MAKING MODERN LIVING POSSIBLE

Service Manual

Steering Unit

EH Electro Proportional

Hydraulic Valve In-line Version

powersolutions.danfoss.com

Revision History Table of Revisions

Date Changed Rev

Mar 2014 Converted to Danfoss layout - DITA CMS BA

Sep 2010 New back cover AB

Jun 2010 First edition AA

Service Manual EH Electro Proportional Hydraulic Valve In-line Version

2L1026660 • Rev BA • Mar 2014

Exploded view Exploded view EH valve with dynamic orifice (no PVFC Spool)...................................................................................... 4

Exploded viev EH Valve with PVFC Spool................................................................................................................................5

Tools Tools......................................................................................................................................................................................................6

Dismantling Dismantling the EH valve.............................................................................................................................................................. 7

Preassembly Inspection, cleaning and replacement...................................................................................................................................13

Cleaning.......................................................................................................................................................................................13

Inspection and replacement.................................................................................................................................................13

Lubrication..................................................................................................................................................................................13

Reassembly Reassembly of the EH valve........................................................................................................................................................14

Service Manual EH Electro Proportional Hydraulic Valve In-line Version

Contents

L1026660 • Rev BA • Mar 2014 3

Exploded view EH valve with dynamic orifice (no PVFC Spool)

5678

16 2

12 4

P301 292

Spare parts list

Spare parts Item Number per unit Torque setting Nm

Valve housing 1 1 -

Main spool 2 1 -

PVE 3 1 -

Plug 4 1 50 ± 5

Filter 5 2 -

O-ring 6 3 -

O-ring 7 1 -

O-ring 8 1 -

Spring 9 1 -

PR cone 10 1 -

PR spool 11 1 -

Plug 12 1 15 ± 2

Pilot cone and spring 13 1 -

Adjusting screw 14 1 -

Protection plug 15 1 -

Plug 16 2 15 ± 2

Screw 17 4 8 ± 0.5

Throttle screw 18 1 1 ± 0.1

Service Manual EH Electro Proportional Hydraulic Valve In-line Version

Exploded view

4L1026660 • Rev BA • Mar 2014

Exploded viev EH Valve with PVFC Spool

16 2

P301 293

Spare parts list

Parts Item Number per unit Torque setting Nm

Valve housing 1 1 -

Main spool 2 1 -

PVE 3 1 -

Plug 4 1 50 ± 5

Filter 5 1 -

O-ring 6 3 -

O-ring 7 1 -

O-ring 8 1 -

Spring 9 1 -

PR cone 10 1 -

PR spool 11 1 -

Plug 12 1 -

Pilot cone and spring 13 1 -

Adjusting screw 14 1 -

Protection plug 15 1 -

Plug 16 1 15 ± 3

Screw 17 4 8 ± 0.5

PVFC spool 18 1 -

Service Manual EH Electro Proportional Hydraulic Valve In-line Version

Exploded view

L1026660 • Rev BA • Mar 2014 5

Tools

•Open-ended spanner (or socket wrench) 27 mm

•Hexagonal socket spanners 2.5 mm, 4 mm, 5 mm

•Calibration Torque wrench

•Small screw driver

•Magnetized tool

•O-ring pick or similar

•3 mm threaded screw

•Bench vise

Tools are not available from Danfoss

Service Manual EH Electro Proportional Hydraulic Valve In-line Version

Tools

6L1026660 • Rev BA • Mar 2014

Dismantling the EH valve

Remove the 4 screws (17) and pull

PVE (3) from the housing.

(5 mm hexagon spanner).

Carefully pries lose the o-ring seals (6, 7, and 8) and

Screen Mesh Filter (5) from PVE.

Fasten housing in a vice and remove the spool

retainer plug (4) using a 27 mm spanner or socket

wrench.

Service Manual EH Electro Proportional Hydraulic Valve In-line Version

Dismantling

L1026660 • Rev BA • Mar 2014 7

Remove spool (2) by holding the centering spring

and pull out slowly.

Remove the PVFC spool retainer plug (16) using a 5

mm  Allan key.

This only applies to units with PVFC spool.

Insert a 3 mm threaded screw into the end of the

PVFC spool (18) and use to remove the spool from

the housing.

Service Manual EH Electro Proportional Hydraulic Valve In-line Version

Dismantling

8L1026660 • Rev BA • Mar 2014

Screw out the pressure reducing valve plug (12)

with a 5 mm  Allan key.

Remove the Pressure Reducing spool (11) from the

cavity.

Remove the Pressure Reducing poppet (10) with a

magnetized tool.

Service Manual EH Electro Proportional Hydraulic Valve In-line Version

Dismantling

L1026660 • Rev BA • Mar 2014 9

Remove the Pressure Reducing spring (9) with O-

ring pick or similar.

Pries of the Pilot Relief Valve plastic protection

cover (15) with a small screw driver or O-ring pick.

Then remove the Pilot Pressure relief valve

adjusting screw (14) with a 5 mm  Allan key.

Service Manual EH Electro Proportional Hydraulic Valve In-line Version

Dismantling

10 L1026660 • Rev BA • Mar 2014

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