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EHPS
Service guide
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Danfoss EHPS Service guide

Service Manual
Steering Valve
EHPS and EHPS with OLS 320
powersolutions.danfoss.com
EHPS Steering Valve and OLS 320
Revision history Table of revisions
Date Changed Rev
July 2016 Updated EHPS spare parts list 0102
June 2015 First version AA
2 | © Danfoss | July 2016 AX00000235en-US0102
EHPS Steering Valve and OLS 320

Contents

Safety Precautions
Safety precautions............................................................................................................................................................................4
Service Literature
Symbols Used in Danfoss Literature..........................................................................................................................................5
EHPS versions.....................................................................................................................................................................................5
Exploded view
EHPS type 0, 1 and 2 exploded view......................................................................................................................................... 6
EHPS spare parts list........................................................................................................................................................................ 7
EHPS with flanged on OLS 320 exploded view......................................................................................................................9
EHPS and OLS 320 spare parts list............................................................................................................................................10
Seal kits and spare parts for EHPS and OLS 320..................................................................................................................11
Tools
Tools for EHPS................................................................................................................................................................................. 12
Disassembly and assembly
Disassembly of EHPS.....................................................................................................................................................................13
Assembly of EHPS.......................................................................................................................................................................... 23
Disassembly of OLS 320 and priority valve spool of EHPS..............................................................................................31
Assembly of OLS 320 and priority valve spool of EHPS....................................................................................................35
Testing
Testing of EHPS...............................................................................................................................................................................39
Set up for testing the EHPS................................................................................................................................................... 39
Steering test using pilot steering unit type OSPCX CN...............................................................................................39
Pilot relief valve for EHPS.......................................................................................................................................................40
Neutral positioning test, OSP part for EHPS....................................................................................................................40
Steering and neutral positioning test, EH part with EHPS.........................................................................................40
Manual steering with EHPS...................................................................................................................................................40
Testing of EHPS with OLS 320................................................................................................................................................... 41
Set up for testing the EHPS with OLS 320........................................................................................................................41
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W
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EHPS Steering Valve and OLS 320

Safety Precautions

Safety precautions

Always consider safety precautions before beginning a service procedure. Protect yourself and others from injury. Take the following general precautions whenever servicing a hydraulic system.
Warning
Unintended Machine Movement
Unintended movement of the machine or mechanism may cause injury to the technician or bystanders. To prevent unintended 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 valves is:
•
Changing seals and o-rings
•
Disassemble, clean, and assemble if contaminated
•
Hydraulic testing, including valve setting
4 | © Danfoss | July 2016 AX00000235en-US0102
EHPS Steering Valve and OLS 320

Service Literature

Symbols Used in Danfoss Literature

•
= Non removable part, use a new part
•
= External hex head
•
= Internal hex head
•
= Lubricate with hydraulic fluid
•
= Inspect for wear or damage
•
= Note correct orientation
•
= Mark orientation for reinstallation
•
= Torque specification
•
= Press in - press fit
•
= Pull out with tool - press fit

EHPS versions

This service literature is valid for:
•
EHPS type 0: EHPS without PVE actuation module
•
EHPS type 1 and 2: EHPS with PVE actuation module
•
EHPS with flanged on priority valve module, OLS 320
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Danfoss | July 2016 AX00000235en-US0102 | 5
63b
110
6
112
111
1
61
16
4
21
80
2
8
82
80
15
20b
65
26
63a
91
3
95
81
9
85
20e
5
60
23
20c
7
25
94
62
81
82
114
70
70
20a
20d
22
201
201
201
201
201
201
202
203
202
204
204
205
205
201
202
206
66
67
Type 2, AMP
Type 2, DEUTSCH
Type 1, DEUTSCH
Type 0, Cover
63b
63b
6
6
6
6
61
62
90
Type 2, PVED-CLS
63b
207
207
P301 825
EHPS Steering Valve and OLS 320

Exploded view

EHPS type 0, 1 and 2 exploded view

6 | © Danfoss | July 2016 AX00000235en-US0102
EHPS Steering Valve and OLS 320
Exploded view

EHPS spare parts list

EHPS spare parts
EHPS Number per unit Item Tigtening
Valve block 1 1 ­Spool with spring, directional 1 2 ­Spool with spring, pilot - OSP 1 3 ­Spool, meetering 1 4 ­Spring 1 5 ­PVE 1 6 ­Spool, priority valve 1 7 ­Orifice, Dynamic 1 8 3.5±0.5 Nm Spring 1 9 ­Tube 1 15 10±0.5 Nm Plug 1 16 10±0.5 Nm Plug 1 20a 40±3 Nm Plug 1 20b 40±3 Nm Plug 1 20c 40±3 Nm Plug 1 20d 40±3 Nm Plug 1 20e 40±3 Nm Bushing 1 21 40±3 Nm Plug 1 22 40±3 Nm Plug 1 23 40±3 Nm Plug 1 25 20±3 Nm Ball 1 26 ­Cover 1 60 ­O-ring Ø5.0 x Ø1.5 mm 5 61 ­O-ring Ø27.5 x Ø1.5 mm 3 62 ­Screw, M6, l=33 mm 4 63a 8±0.5 Nm Screw, M6, l=33 mm 4 63b 8±0.5 Nm Plug w. O-ring 1 65 ­Cover, EHPS type 0 1 66 ­Screw, M6, l=15 mm, EHPS type 0 4 67 8±0.5 Nm Shuttle valve 2 70 ­Shock valve 2 80 ­Spring, conical 2 81 ­Plug 2 82 40±3 Nm Check valve 1 85 25±5 Nm Seat for pilot relief valve 1 90 20±3 Nm Cone with spring for pilot relief valve 1 91 ­Adjusting screw for pilot relief valve 1 94 ­Plug 1 95 ­O-ring Ø10.0 x Ø2.0 mm 3 110 ­O-ring Ø30.0 x Ø2.5 mm 1 111 ­O-ring Ø8.0 x Ø2.0 mm 1 112 ­Filter 1 114 ­O-ring Ø17.4 x Ø2.1 mm 9 201 -
torque
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EHPS Steering Valve and OLS 320
Exploded view
EHPS spare parts (continued)
EHPS Number per unit Item Tigtening
O-ring Ø15.0 x Ø1.5 mm 3 202 ­O-ring Ø14.0 x Ø1.5 mm 1 203 ­O-ring Ø10.0 x Ø2.0 mm 2 204 ­O-ring Ø15.6 x Ø1.78 mm 2 205 ­O-ring Ø9.0 x Ø2.0 mm 1 206 ­O-ring Ø5.0 x Ø1.0 mm 4 207 -
torque
8 | © Danfoss | July 2016 AX00000235en-US0102
110
112
111
10
1
16
4
21
80
8
304
310
82
80
15
20b
309
26
321
91
3
95
306
81
9
12
90
322
85
20e
307
323
5
23
20c
7
25
94
105
81
82
301
305
114
320
320
70
20a
20d
22
201
201
201
201
201
201
202
203
202
204
204
205
205
201
202
206
6
6
61
65
63a
60
62
70
207
2
66
67
Type 2, DEUTSCH
Type 1, DEUTSCH
Type 0, Cover
63b
63b
6
6
61
62
Type 2, PVED-CLS
63b
63b
Type 2, AMP
207
P301 826
EHPS Steering Valve and OLS 320
Exploded view

EHPS with flanged on OLS 320 exploded view

©
Danfoss | July 2016 AX00000235en-US0102 | 9
EHPS Steering Valve and OLS 320
Exploded view

EHPS and OLS 320 spare parts list

EHPS spare parts
EHPS Number per unit Item Tigtening
Valve block 1 1 ­Spool with spring, directional 1 2 ­Spool with spring, pilot - OSP 1 3 ­Spool, meetering 1 4 ­Spring 1 5 ­PVE 1 6 ­Spool, priority valve 1 7 ­Orifice, Dynamic 1 8 3.5±0.5 Nm Spring 1 9 ­Orifice, PP 1 10 3.5±0.5 Nm Filter 1 12 ­Tube 1 15 10±0.5 Nm Plug 1 16 10±0.5 Nm Plug 1 20a 40±3 Nm Plug 1 20b 40±3 Nm Plug 1 20c 40±3 Nm Plug 1 20d 40±3 Nm Plug 1 20e 40±3 Nm Bushing 1 21 40±3 Nm Plug 1 22 40±3 Nm Plug 1 23 40±3 Nm Plug 1 25 20±3 Nm Ball 1 26 ­Cover 1 60 ­O-ring Ø5.0 x Ø1.5 mm 5 61 ­O-ring Ø27.5 x Ø1.5 mm 3 62 ­Screw, M6, l=33 mm 4 63a 8±0.5 Nm Screw, M6, l=33 mm 4 63b 8±0.5 Nm Plug w. O-ring 1 65 ­Cover, EHPS type 0 1 66 ­Screw, M6, l=15 mm, EHPS type 0 4 67 8±0.5 Nm Shuttle valve 2 70 ­Shock valve 2 80 ­Spring, conical 2 81 ­Plug 2 82 40±3 Nm Check valve 1 85 25±5 Nm Seat for pilot relief valve 1 90 20±3 Nm Cone with spring for pilot relief valve 1 91 ­Adjusting screw for pilot relief valve 1 94 ­Plug 1 95 ­Plug 2 105 40±3 Nm O-ring Ø10.0 x Ø2.0 mm 3 110 ­O-ring Ø30.0 x Ø2.5 mm 1 111 -
torque
10 | © Danfoss | July 2016 AX00000235en-US0102
EHPS Steering Valve and OLS 320
Exploded view
EHPS spare parts (continued)
EHPS Number per unit Item Tigtening
O-ring Ø8.0 x Ø2.0 mm 1 112 ­Filter 1 114 ­O-ring Ø17.4 x Ø2.1 mm 9 201 ­O-ring Ø15.0 x Ø1.5 mm 3 202 ­O-ring Ø14.0 x Ø1.5 mm 1 203 ­O-ring Ø10.0 x Ø2.0 mm 2 204 ­O-ring Ø15.6 x Ø1.78 mm 2 205 ­O-ring Ø9.0 x Ø2.0 mm 1 206 ­O-ring Ø5.0 x Ø1.0 mm 4 207 -
OLS 320 spare parts
OLS 320 Number per unit Item Tightening
Housing 1 301 ­Spool 1 304 ­Orifice, LS 1 305 1±0.1 Nm Orifice, PP 1 306 3.5±0.5 Nm Spring 1 307 ­Plug, LS 1 309 50±5 Nm Plug. PP 1 310 50±5 Nm O-ring Ø29.6 x Ø2.9 mm 2 320 ­O-ring Ø16.0 x Ø2.5 mm 2 321 ­Screw 3 322 28±2 Nm Washer 3 323 -
torque
torque

Seal kits and spare parts for EHPS and OLS 320

Spare parts list Code No. Item
Seal kit, EHPS 150H4021 61, 62, 201, 202, 203, 204, 205, 206, 207 Seal kit OLS 320 152B6200 320 Seal kit for block ass. 11008362 321 Seal kit for PVE/cover 157B4997 110, 111, 112, 114 Shuttle valve, 2 pcs 11007949 70
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Danfoss | July 2016 AX00000235en-US0102 | 11
150H11.11
78[3.07]
47.5[1.870] 47.5[1.870]
83.5[3.287]
22.5[0.886]
B
68[2.68]
14[0.55]
47.5[1.870]47.5[1.870]
4.3[0.17]
83.5[3.287]
A
EHPS Steering Valve and OLS 320

Tools

Tools for EHPS

Holding tool: It is recommended to use appropriate steel plate with mounting holes 3x Ø 10 mm matching mounting thread holes, A or B on one of the two mounting sides of EHPS.
All versions M8 • 1.25, 10 mm [0.39 in] deep M8 • 1.25, 10 mm [0.39 in] deep
Torque wrench 0 - 70 Nm. 6 and 13 mm socket spanner. 5, 2x 8, 12 and 14 mm Hex keys. T50 Torx key 2 mm screwdriver. 13 – 17 – 19 – 36 – 41 mm ring spanner. Pliers Inside circlip pliers. Tweezers
These tools are not available from Danfoss.
A B
12 | © Danfoss | July 2016 AX00000235en-US0102
EHPS Steering Valve and OLS 320

Disassembly and assembly

Disassembly of EHPS

Disassembly of EHPS
Place the unit on the holding tool.
EHPS type 0 (without PVE):
Screw out the 4 screws (67) for cover (66) using a 5 mm
Hex key. Remove the cover (66). O-rings (61 and 62) are fitted to cover (66).
Shuttle valves (70) are not present in EHPS type 0.
EHPS type 1 and type 2:
Screw out the 4 screws (63b) for PVE (6) using a 5 mm Hex key. Remove the PVE (6). O-rings (110, 111 and 112) and filter (114) are fitted to the mounting surface of PVE. Shuttle valve (70) is fitted into the mounting surface of PVE (6) and housing (1), it will stay in one of the 2 elements when removing the PVE from the EHPS housing.
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EHPS Steering Valve and OLS 320
Disassembly and assembly
Disassembly of EHPS (continued)
Screw out the plug (25) using an 8 mm Hex key. O-rings (201, 202 and 203) are fitted to the bushing (21).
Remove the ball (26).
Screw out the plugs (20c, 20d and 22) using an 8 mm Hex key. O-rings (201) are fitted to the plugs.
14 | © Danfoss | July 2016 AX00000235en-US0102
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