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EHi
Service guide
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Danfoss EHi Service guide

Service Manual
Steering
EHi Steering Valve
powersolutions.danfoss.com
Service Manual
Revision history Table of revisions
Date Changed Rev
Sep 2017 First edition 0101
2 | © Danfoss | Sep 2017 AX00000350en-US0101
Service Manual

Contents

Safety precautions EHi Steering Valve versions Exploded View and Parts List
EHi Full Exploded View...................................................................................................................................................................6
EHi Steering Valve Parts List......................................................................................................................................................... 6
Seal kits and spare parts for EHi.................................................................................................................................................. 9
Tools
EHi Steering Valve holding tool................................................................................................................................................10
Other required tools for EHi Steering Valve maintenance..............................................................................................11
Disassembly
Remove PVE from housing.........................................................................................................................................................12
Remove Coil from housing.........................................................................................................................................................13
Remove Priority Valve from housing...................................................................................................................................... 13
Remove Cut Off Valve from housing.......................................................................................................................................15
Remove Reaction Switch Valve (RSV) from housing......................................................................................................... 15
Remove PVFC/LS copy or LS shuttle valve from housing................................................................................................16
Remove Pilot reduction valve(s) from housing...................................................................................................................17
Remove Directional Valve from housing...............................................................................................................................18
Remove four remaining plugs near Pilot Relief Valve from housing.......................................................................... 18
Remove Pilot Relief Valve from housing................................................................................................................................19
Remove Shock valves from housing.......................................................................................................................................20
Remove steel plugs from ports.................................................................................................................................................21
Fully disassembled EHi.................................................................................................................................................................22
Assembly
Address seal kit............................................................................................................................................................................... 23
Insert steel plugs into ports........................................................................................................................................................23
Insert shock valves into housing.............................................................................................................................................. 24
Insert pilot relief valve into housing........................................................................................................................................25
Insert plugs near pilot relief valve into housing................................................................................................................. 26
Insert directional valve into housing...................................................................................................................................... 26
Insert plugs near directional valve into housing................................................................................................................27
Insert pilot reduction valve(s) into housing......................................................................................................................... 27
Insert PVFC/LS copy or LS shuttle valve into housing...................................................................................................... 28
Insert priority valve into housing............................................................................................................................................. 29
Insert cut off valve into housing...............................................................................................................................................30
Insert reaction switch valve (RSV) into housing..................................................................................................................30
Attach coil to housing.................................................................................................................................................................. 31
Attach PVE to housing..................................................................................................................................................................32
Testing of EHi
Setup for testing.............................................................................................................................................................................34
EHi for LS steering units...............................................................................................................................................................35
EHi for open center steering units...........................................................................................................................................36
Steering tests
Start up test......................................................................................................................................................................................38
Pilot relief valve...............................................................................................................................................................................38
Neutral positioning test...............................................................................................................................................................38
Cut off valve test.............................................................................................................................................................................38
RSV valve test...................................................................................................................................................................................38
Check for external leakage Shock valves Tightening torques for connections
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Service Manual

Safety precautions

Warning
Unintended vehicle or machine movement hazard.
Unintended movement of the machine or mechanism may cause injury to the technican or bystanders. To prevent uintended movement, secure the machine or disable/disconnect the mechanism while servicing.
Warning
Flammable cleaning solvents
Some cleaning solvents are flammable. To eliminate the risk of fire, do not use cleaning solvents in an area where a source of ignition may be present.
Warning
Fluid under pressure
Escaping hydraulic fluid under pressure can have sufficient force to penetrate your skin causing serious injury and/or infection. This fluid may also be hot enough to cause burns. Use caution when dealing with hydraulic fluid under pressure. Relieve pressure in the system before removing hoses, fittings, gauges, or components. Never use your hand or any other body part to check for leaks in a pressurized line. Seek medical attention immediately if you are cut by hydraulic fluid.
Warning
Personal safety
Protect yourself from injury. Use proper safety equipment, including safety glasses at all times.
Warning
Product safety
Steering valves are safety components and therefore it is extremely important that the greatest care is taken when servicing these products. There is not much wear on a steering valve and therefore they normally outlast the application they are built into. Therefore the only recommended service work on steering valve is:
Changing seals and O-rings
•
Disassemble, clean and assemble if contaminated
•
Make hydraulic testing including valve setting
•
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Service Manual

EHi Steering Valve versions

EHi versions
This service literature is valid for any version of EHi, the exploded view is universal. These modules/valve functions are present only in some versions of EHi:
Reaction Switch Valve, RSV.
•
Pilot reduction valves, PRV; in versions with RSV: 2 PRV's. In any other versions: 1 PRV.
•
Priority Valve
•
PVFC valve/LS resolver or LS shuttle valve, or none.
•
Shock and suction valves.
•
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Service Manual

Exploded View and Parts List

EHi Full Exploded View

EHi exploded view

EHi Steering Valve Parts List

EHi parts list
Item Description Number per
unit
1 Housing 1 ­2 Spool, EH steering 1 ­3 Priority valve spool 1 -
3.1 Spool 1 -
3.2 Orifice, PP 1 3.5 ± 0.5 N•m [31 ± 4.4 lbf•in]
3.3 Orifice, dynamic 1 1 ± 0.1 N•m [8.9 ± 0.9 lbf•in]
Tightening torque
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Service Manual
Exploded View and Parts List
EHi parts list (continued)
Item Description Number per
unit
4 PVE 1 -
4.1 PVE actuator 1 -
4.9 Filter 1 -
4.11 O-ring Ø8x2 1 -
4.12 O-ring Ø30x2.5 1 -
4.13 O-ring Ø10x2 3 ­5 Plug with O-ring 1 45 ± 5 N•m [398.3 ± 44.3 lbf•in]
5.1 Plug 1 -
5.2 O-ring Ø23.3x2.40 1 ­6 Compression spring 1 ­7 Plug with O-ring 1 45 ± 5 N•m [398.3 ± 44.3 lbf•in]
7.1 Plug 1 -
7.2 O-ring Ø17.40x2.10 1 ­9 Plug with O-ring 1 45 ± 5 N•m [398.3 ± 44.3 lbf•in]
9.1 Plug 1 -
9.2 O-ring Ø17.4x2.1 1 ­10 Screw 4 8 ± 1 N•m [70.8 ± 8.9 lbf•in] 13 Compression spring 2 ­14 Cone, pilot supply 1 ­15 Spool, pilot supply 1 ­16 Plug with O-ring 1 30 ± 3 N•m [265.5 ± 26.6 lbf•in] 17 Compression Spring 1 ­18 Cone, pilot supply 1 ­19 Spool, pilot supply 1 ­20 Plug with O-ring 1 30 ± 3 N•m [265.5 ± 26.6 lbf•in] 22 Orifice, LS 1 3.5 ± 0.5 N•m [31 ± 4.4 lbf•in] 24 Spool PVFC/LS resolver 1 -
24.1 Spool 1 -
24.2 Check valve 1 1.4 ± 0.2 N•m [12.4 ± 1.8 lbf•in]
24.3 Check valve 1 1.4 ± 0.2 N•m [12.4 ± 1.8 lbf•in] 25 Plug with O-ring 1 45 ± 5 N•m [398.3 ± 44.3 lbf•in]
25.1 Plug 1 ­26 Compression spring 1 ­27 Plug with O-ring 1 45 ± 5 N•m [398.3 ± 44.3 lbf•in]
27.1 Plug 1 -
27.2 O-ring Ø17.4x2.10 1 ­30 Spool, RSV 1 ­31 Compression spring 1 ­32 Plug with O-ring 1 45 ± 5 N•m [398.3 ± 44.3 lbf•in]
32.1 Plug 1 -
32.2 O-ring Ø17.40x2.10 1 ­33 Plug with O-ring 1 45 ± 5 N•m [398.3 ± 44.3 lbf•in]
33.1 Plug 1 -
33.2 O-ring Ø17.4x2.1 1 -
Tightening torque
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Service Manual
Exploded View and Parts List
EHi parts list (continued)
Item Description Number per
unit
37 Label with cover 1 ­41 Compression spring 1 ­42 Spool, Cut off 1 -
42.1 Spool 1 -
42.2 Plug 1 3.5 ± 0.5 N•m [31 ± 4.4 lbf•in] 43 Plug with O-ring 1 45 ± 5 N•m [398.3 ± 44.3 lbf•in]
43.1 Plug 1 -
43.2 O-ring Ø17.40x2.10 1 ­44 Plug with O-ring 1 45 ± 5 N•m [398.3 ± 44.3 lbf•in]
44.1 Plug 1 -
44.2 O-ring Ø17.4x2.1 1 ­46 Spool kit 1 -
46.1 Spool, pilot dump 1 15 ± 2 N•m [132.8 ± 17.7 lbf•in]
46.2 O-ring Ø9.25x1.78 1 -
46.3 O-ring Ø7.65x1.78 1 -
46.4 O-ring Ø13.5x2.08 1 ­47 Coil 1 ­48 Nut 1 5 ± 1 N•m [44.3 ± 8.9 lbf•in] 49 O-ring Ø10x2 1 ­80 Shock valve 2 ­81 Spring 2 ­82 Plug with O-ring 2 35 ± 3 N•m [309.8 ± 26.6 lbf•in] 87 LS shuttle valve 1 10 ± 1 N•m [88.5 ± 8.9 lbf•in]
87.1 Cartridge housing with ball 1 -
87.3 O-ring Ø5x1.5 2 -
87.5 O-ring Ø4.0x1.0 1 ­88 Plug 1 12.6 ± 0.6 N•m [111.5 ± 5.3 lbf•in] 93 Plug 1 ­95 PV valve 1 20 ± 3 N•m [177 ± 26.6 lbf•in]
95.1 Cartridge 1 -
95.2 Cone 1 -
95.3 Adjusting screw 1 -
95.4 Compression spring 1 -
95.5 Backup ring 1 -
95.6 O-ring Ø8x1.5 1 -
95.7 O-ring Ø7.5x1.5 1 -
95.8 O-ring Ø11x2 1 -
95.9 Lock ring 1 -
95.10 Filter 1 ­252 Plug 1 45 ± 5 N•m [398.3 ± 44.3 lbf•in] 255 Plug 1 45 ± 5 N•m [398.3 ± 44.3 lbf•in] 256 Plug 1 45 ± 5 N•m [398.3 ± 44.3 lbf•in] 257 Plug with O-ring 1 45 ± 5 N•m [398.3 ± 44.3 lbf•in]
Tightening torque
8 | © Danfoss | Sep 2017 AX00000350en-US0101
Service Manual
Exploded View and Parts List
EHi parts list (continued)

Seal kits and spare parts for EHi

Seal kits and spare parts for EHi
Item Description Number per
258 Plug 1 20 ± 3 N•m [177 ± 26.6 lbf•in] 259 Plug 1 20 ± 3 N•m [177 ± 26.6 lbf•in]
Part Code number Item
Seal kit for EHi 11191725 5.2, 7.2, 9.2, 16, 20, 25.2, 27.2, 32.2, 33.2, 43.2,
Coil, DEUTSCH: D08 12V DE 322113 11084688 47 Coil, DEUTSCH: D08 24V DE 322115 11192696 47 Spare part bag containing: 1 plug. O-ring for
shock valve For replacement shock valves please refer to PVG 32 Technical information, document number 520L0344
Spare part bag containing: Cartridge spool for pilot dump, Nut and O-ring
Seal kit for Cartridge spool for pilot dump 120433 46.2, 46.3, 46.4 Seal kit for Pilot relief valve 155L6870 95.5, 95.6, 95.7, 95.8, 95.9, 95.10 Seal kit for PVE 157B4997 4.9, 4.11, 4.12, 4.13
157B2002 82
11085713 46, 48, 49
unit
Tightening torque
44.2, 49, 2x 87.3, 87.5, 88, 93
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Min. 12
4±0.2
Ø16
Ø12±0.2
45°
B
B
125.5
33.5
68
16.5
93
151
C
C
B-B
Service Manual

Tools

EHi Steering Valve holding tool

It is recommended to use appropriate steel plate with mounting holes 3x Ø 10 mm matching mounting thread holes, C, on mounting side of EHi.
Mounting dimensions for EHi holding tool
C parameters
M8 x 1.25 12 mm deep
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Service Manual
Tools

Other required tools for EHi Steering Valve maintenance

A list of tools required for disassembly and reassembly of EHi Steering Valve for inspection and maintenance.
Tool for removing/assembling pilot relief valve cartridge:
Code Number: 155L6494
These tools are not available from Danfoss:
•
Torque wrench 0 - 70 Nm
•
13, 18, 19, and 32 mm socket spanner
•
2, 3, 4, 5, 6, 8, and 10 mm Hex keys
•
2mm screwdriver
•
13, 18, 19 mm, and 7/8 inch ring spanner.
•
Inside circlip pliers
•
Magnet, max outer diameter: 9 mm
•
Tweezers (not pictured)
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4.13
4.12
4.11
10
4.9
4.1
Service Manual

Disassembly

Remove PVE from housing

This section will show you how to fully disassemble the EHi Steering Valve for inspection, cleaning, and maintenance.
To disassemble EHi Steering Valve follow these steps.
Place the unit on the holding tool. Use 3 pcs M8 x 1.25, length: 10 mm, plus thickness of console plate.
EHi Steeering Valve mounted on holding tool.
To remove the PVE from the EHi Steering Valve housing, follow these steps. The PVE is attached to the housing with four screws. Five O-rings seal the unit in place, and a filter is also
found between the unit and the housing itself.
PVE parts and housing
Wrench size and torque
Item Description Wrench Size Torque
10 (x4) Screw 5 mm internal hex 8 ± 1 N•m [70.8 ± 8.9 lbf•in]
1. Screw out the four screws (10) for PVE (4) using a 5 mm Hex key .
2. Remove the PVE (4).
O-rings (4.11, 4.12, and 4.13), and filter (4.9) are fitted to the mounting surface of the PVE.
12 | © Danfoss | Sep 2017 AX00000350en-US0101
46.4
46.3
46.2
46.1
47
48
49
3.2
3.1
3.3
6
7.2
7.1
Service Manual
Disassembly

Remove Coil from housing

One or more O-rings may stick to the EHi housing. Remove before proceeding.
To remove the Coil from the EHi Steering Valve housing, follow these steps.
Coil parts and housing
Wrench size and torque
Item Description Wrench size Torque
48 Nut 19 mm external hex 5 ± 1 N•m [44.3 ± 8.9 lbf•in]
46.1 Spool, pilot dump 7/8 inch external hex 15 ± 2 N•m [132.8 ± 17.7 lbf•in]
1. Screw off the nut (48) using a 19 mm socket or ring spanner.
2. Remove the O-ring (49) using a 2 mm flat head screwdriver.
3. Lift off the Coil (47).
4. Screw out the cartridge spool (46) using a 7/8 inch ring spanner.
O-rings (46.2, 46.3, and 46.4) are fitted on cartridge spool (46).

Remove Priority Valve from housing

To remove Priority Valve from the EHi Steering Valve housing, follow these steps. The valve is removed in a three-step sequence, involving the plug, spring, and the spool.
Remove the Priority Valve
Priority Valve parts and housing
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Service Manual
Disassembly
Wrench size and torque
Item Description Wrench size Torque
7 Plug with O-ring 18 mm external hex 45 ± 5 N•m [398.3 ± 44.3 lbf•in]
3.2 Orifice, PP 3 mm internal hex 3.5 ± 0.5 N•m [31 ± 4.4 lbf•in]
3.3 Orifice, dynamic 2 mm internal hex 1 ± 0.1 N•m [8.9 ± 0.9 lbf•in]
1. Screw out the plug (7) using an 18 mm socket or ring spanner.
On EHi versions without priority valve, only plug (7) with hex key profile is present. Screw out this plug using an 8 mm Hex key.
O-ring (7.2) is fitted to the plug.
2. Remove the spring (6).
3. Remove the priority valve spool (3).
Remove priority valve spool with circlip pliers.
Orifices (3.2 and 3.3) are screwed into spool (3.1)
Orifice (3.3) is not present in the "Static" type priority valve spool.
a) Before removing orifices (3.2 and 3.3): fix the spool in a vice with aluminum jaws.
b) Screw out PP orifice (3.2) using a 3 mm Hex key.
c) Screw out dynamic orifice (3.3) using a 2 mm Hex key.
14 | © Danfoss | Sep 2017 AX00000350en-US0101
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