For more than 40 years, Danfoss has been developingstate-of-the-art components and systems for mobilemachinery used in off-highway operations around theworld. We have become a preferred supplier byoffering the best of what really matters: The hardwareinside your vehicle application.

The DDC20 uses proven technology which enables itto operate reliably in light duty applications. Itsdesign includes many optional features whichprovides for a large degree of application flexibility.Its compact size helps the DDC20 fit in tight placesand allows for a more simplified hydraulic circuitdesign. The DDC20 is a high quality light duty pumpwhich offers expanded functionality, great totalefficiency, low noise, and easy installation.

The DDC20 is well suited for turf care applications,compact utility tractors, harvesters, small rollers, andagricultural vehicles.

Features

• Designed for Durability and Flexibility‒ Compact and light weight aluminum

housing‒ Single piece swash plate

• Installation and Packaging Benefits‒ Compact design minimizes

installation space requirements‒ High corner power‒ Integrated loop flushing valve

• Optimized for Direct DisplacementControl

• Options‒ Loop flushing valve‒ Gerotor charge pump‒ Loop bypass valve‒ High Pressure Relief Valve (HPRV)

and Charge Pressure Relief Valve(CPRV)

‒ Auxiliary pad

Comprehensive technical literature onlineat powersolutions.danfoss.com

Data Sheet

DDC20Axial Piston Variable Displacement Pump

© Danfoss | February 2017 L1102651 | AI00000112en-US0203 | 1

Technical specifications

Features Unit Value

Displacement cm3 [in3] 20 [1.22]

Weight (with charge pump) kg [lb] 10 [22.1]

Input speed Minimum* min-1 (rpm) 500

Rated 4000

Maximum 4500

System pressure Max. working pressure** bar [psi] 300 [4350]

Max. pressure 345 [5004]

Min. low loop 4 [58]

Case pressure Rated bar [psi] 1.5 [21.7]

Maximum 3 [43.5]* No load condition.** Applied pressures above max. working pressure require Danfossapproval.

Schematic

P400 047

A

B

M3 MA

MBL1

L3

L2 S

Dimensions:With Aux-Pad (No Charge pump)

With Charge pump (No Aux-Pad)

P400 048

External Charge Supply "E"

Case Drain Port "L1"

Loop Flushing Valve

(Optional)

Port ISO 11926-1-9/16-18

Port ISO 11926-1-3/4-16("L2" on Reverse Side)

Bypass Valve

High Pressure Relief Valve

(or Charge Gage Port "M3")

(Both Side)

Approximate

Center of Gravity

15 [0.59]

[ ]

60.94 [2.4]

9.7 0-0.5

0.38 0-0.02

51.5

[2

.03]

73.6

[2.9

]

31

[1.2

2]

175.5 [6.91]

17 [0.67]

177.5 [6.99]

193.5[7.62]

(2)

[0.0

6]

111 [4.37]

35

[1.3

8]

74 [2.91]

M10x1.5

M8 P1.25

16 Full thread depth[0.71]

High Pressure

Relief Valve

High PressureRelief Valve

79.2 [3.12]

74.5

[2

.97]

53.2 [2.09]

53.2 [2.09]

53.2

[2

.09]

53.2

[2

.09]

Ø 1

9.5

±0.0

8

Ø 0

.77

±0.0

08

Ø 1

6 ±

0.08

[0.6

3]

R5

10 ±0.25 [0.39]

[

]

24.5 ±0.2 [0.96]

16 ±0.08 [0.63]

108 [4.25]

80.4

[3

.17]

60.4 (2x) [2.38]

(1) [0.03]

73

[2.8

7]73

[2

.87]

87

[3.4

3]87

[3

.43]

CWCCW

14.3 [0.56]

73

[2.8

7]73

[2

.87]

87

[3.4

3]87

[3

.43]

CWCCW

[

]

17+0.06

-0.04

0.669+0.0024

-0.0016

79.2 [3.12]

1

80.4

[3.1

7]74

.5[2

.95]

108 [4.25]

18° 18°

65.6

[2.6

]

131.5[5.18]

CWCCW

Bypass ValveCase Drain Port "L1"Port ISO 11926-1-3/4-16("L2" on Reverse Side)

High Pressure Relief Valve(Both Side) 15

[0.59]

(2)

[0.0

8]

183.5 [7.22]

51.5

[2

.03]73

.6 (2

x) [2

.9]

17 [0.67]

[

]

Ø 1

01.6

0 -0.0

5

Ø 4

.0 0 -0

.002

34

[1.3

3]

60.94 [2.4] [0.38]

9.7

74 [2.91] 0

-0.5

(101)[3.98]

Approximate

Center of Gravity

2x Ø 14.3 0.3

-0.1

[ ]Ø 0.56 0.011-0.003

Case drain “L3”

View A

A

Port ISO 11926-1-7/8-14

System Port "B"

Case

Dra

inCa

se D

rain

Port ISO 11926-1-7/8-14

System Port "A"

28

[1.1

]28

[1

.1]

137.5 [5.41]

Charge Pressure Relief Valve

71 [2

.8]

71 [2

.8]

Danfoss can accept no responsibility for possible errors in catalogues, brochures and other printed material. Danfoss reserves the right to alter its products without notice. This also applies to productsalready on order provided that such alterations can be made without changes being necessary in specifications already agreed.All trademarks in this material are property of the respective companies. Danfoss and the Danfoss logotype are trademarks of Danfoss A/S. All rights reserved.

2 | © Danfoss | February 2017 L1102651 | AI00000112en-US0203