Danfoss OSPB, OSPC Service guide
MAKING MODERN LIVING POSSIBLE
Service Manual
Steering Unit
Type OSPB and OSPC Type ON
and CN
powersolutions.danfoss.com
Service Manual Hydrostatic Steering Unit Type OSPB and OSPC Type ON and CN
Revision History Table of Revisions
Date Changed Rev
Mar 2014 Converted to Danfoss layout - DITA CMS BA
May 2011 Drawing AC
Sep 2010 New back cover AB
May 2010 First edition AA
2 L1004933 • Rev BA • Mar 2014
Service Manual Hydrostatic Steering Unit Type OSPB and OSPC Type ON and CN
Contents
Exploded view
Exploded view OSPB....................................................................................................................................................................... 4
Exploded view OSPC....................................................................................................................................................................... 5
Dismantling
Tools......................................................................................................................................................................................................7
Dismantling the pressure relief valve for OSPC.....................................................................................................................8
Dismantling the shock valve for OSPC...................................................................................................................................10
Dismantling......................................................................................................................................................................................12
Cleaning............................................................................................................................................................................................ 17
Lubrication....................................................................................................................................................................................... 17
Inspection and Replacement.....................................................................................................................................................17
Assembling
Assembling of spool and sleeve set........................................................................................................................................18
Installation instruction for Roto Glyd Seal............................................................................................................................ 21
Assembling.......................................................................................................................................................................................23
Assembly of the pressure relief valve for OSPC.................................................................................................................. 28
Assembly of the shock valves for OSPC................................................................................................................................. 29
L1004933 • Rev BA • Mar 2014 3
1
5
3
4
2
6
7
8
10
9
11
12
13
11
14
15
16
17
18
P301 267
Service Manual Hydrostatic Steering Unit Type OSPB and OSPC Type ON and CN
Exploded view
Exploded view OSPB
Exploded view OSPB callouts
Callout Description Callout Description
1
2
3
4
5
6
7
8
9
Dust Seal Ring
Housing + Spool + Sleeve
Check Valve Ball (∅8.5 mm )
Threaded Bushing
Roto-glyd Shaft Seal
Thrust Bearing Assembly (3 pcs.)
Retainer Ring
Cross Pin (∅ 6 x 41 mm)
Neutral Spring Kit (4, 6 or 8 pcs.)
10
11
12
13
14
15
16
17
18
Cardan Shaft
O-ring Seal (3 pcs., 79.4 x 2 mm)
Distributor plate
Gear Wheel Set
End Cover Plate
Sealing Washer (7 pcs., 8.2 x 15.2 x 1.0)
Pin Bolt Screw
Screw (6 pcs.)
Model/Code Label
4 L1004933 • Rev BA • Mar 2014
34
35
36
16
15
14
P301 336
11
13
12
11
10
17
18
2
8
9
7
31
32
33
37
5
6
3
4
1
23
21
22
20
19
30
29
28
27
26
24
25
30
29
28
27
26
24
25
Service Manual Hydrostatic Steering Unit Type OSPB and OSPC Type ON and CN
Exploded view
Exploded view OSPC
Exploded view OSPC callouts
Callout Description Callout Description
1
2
3
4
5
6
7
8
9
10
11
12
13
Dust Seal Ring
Housing + Spool + Sleeve
Check Valve Ball (∅8.5 mm )
Threaded Bushing
Roto-glyd Shaft Seal
Thrust Bearing Assembly (3 pcs.)
Retainer Ring
Cross Pin (∅ 6 x 41 mm)
Neutral Spring Kit (4, 6 or 8 pcs.)
Cardan Shaft
O-ring Seal (3 pcs. ∅79.4 x 2 mm)
Distributor plate
Gear Wheel Set
20
21
22
23
24
25
26
27
28
29
30
31
32
Relief Valve Spring
O-ring seal (1 pc. ∅14.3 x 2.4mm)
Relief Valve Adjustment Screw
Plastic Plug
Shock Valve Seat (2 pcs.)
O-ring (2 pcs. ∅6 x 1.5mm)
Shock Valve Ball (2 pcs. ∅3/16”)
Shock Valve Spring (2 pcs.)
Shock Valve Adjustment Screw (2 pcs.)
O-ring (2 pcs. ∅9 x 1.5mm)
Plastic Plug
Suction Valve Ball (2 pcs. ∅3/16”)
Suction Valve Spring (2 pcs.)
L1004933 • Rev BA • Mar 2014 5
Service Manual Hydrostatic Steering Unit Type OSPB and OSPC Type ON and CN
Exploded view
Exploded view OSPC callouts (continued)
Callout Description Callout Description
14
15
16
17
18
19
End Cover Plate
Sealing Washer
(7 pcs. ∅8.2 x 2 x 1.0mm)
Pin Bolt Screw
Screw (6 pcs.)
Model/Code Label
Relief Valve Piston
33
34
35
36
37
Suction Valve Retainer Pin
Gear Wheel Set with Seal Star
Seal Star O-ring (1 pc.)
Seal Star PTFE Ring (1 pc.)
Check Valve in the P port
6 L1004933 • Rev BA • Mar 2014
Service Manual Hydrostatic Steering Unit Type OSPB and OSPC Type ON and CN
Dismantling
Tools
Holding tool.
Code number: SJ 150-9000-2
Assembly tool for O-ring and kin-ring / Roto Glyd.
Code number: SJ 150-9000-11.
Code number: SJ: SJ 150N4014-1
Assembly tool for dust seal.
Code number: SJ 150-9000-22
L1004933 • Rev BA • Mar 2014 7
Service Manual Hydrostatic Steering Unit Type OSPB and OSPC Type ON and CN
Dismantling
Torque wrench 0 - 70 Nm.
13 mm socket spanner.
2.75 - 5, 6 and 8 mm Allan key.
12 mm screwdriver.
2 mm [0.08 in] screwdriver.
13 mm ring spanner.
Plastic hammer.
Tweezers.
The tools are not available from Danfoss.
Dismantling the pressure relief valve for OSPC
First remove plastic plug (23).
Screw out the adjustment screw (22) using an 8 mm
hexagon socket spanner.
8 L1004933 • Rev BA • Mar 2014
Service Manual Hydrostatic Steering Unit Type OSPB and OSPC Type ON and CN
Dismantling
Remove the relief valve spring (20).
Remove the piston as shown (19).
The pressure relief valve is now dismantled.
L1004933 • Rev BA • Mar 2014 9
Service Manual Hydrostatic Steering Unit Type OSPB and OSPC Type ON and CN
Dismantling
Dismantling the shock valve for OSPC
Prise off the plastic protection plugs (30) from the two
shock valves.
Remove pressure adjustment screws (29) using a 5
mm hexagon socket spanner.
Remove the two shock valve springs (27).
10 L1004933 • Rev BA • Mar 2014
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