About this manual............................................................................................................................................................................5

Warranty.............................................................................................................................................................................................. 5

General Instructions........................................................................................................................................................................ 5

Safety precautions............................................................................................................................................................................5

Symbols used in Danfoss literature............................................................................................................................................7

Design of H1 bent axis motor...................................................................................................................................................... 8

General description.......................................................................................................................................................................10

H1 pictorial diagram..................................................................................................................................................................... 11

H1 system schematic.................................................................................................................................................................... 12

General specifications.................................................................................................................................................................. 13

Physical properties........................................................................................................................................................................ 13

Operating Parameters.................................................................................................................................................................. 14

H1B speed range diagrams for open and closed circuit..................................................................................................15

Required inlet pressure diagrams (for cylinder block filling)......................................................................................... 16

Open circuit requirements..........................................................................................................................................................17

Fluid specifications........................................................................................................................................................................18

Determination of nominal motor size.................................................................................................................................... 18

Shaft rotation direction................................................................................................................................................................19

Loop flushing shuttle spool........................................................................................................................................................20

Loop flushing relief valve............................................................................................................................................................ 21

Speed sensor................................................................................................................................................................................... 22

Displacement limiter.....................................................................................................................................................................22

Output speed...................................................................................................................................................................................23

System pressure............................................................................................................................................................................. 23

Case pressure...................................................................................................................................................................................24

External shaft seal pressure........................................................................................................................................................24

Temperature.................................................................................................................................................................................... 24

Fluid and filter recommendations........................................................................................................................................... 25

Ports and Gauge Information.................................................................................................................................................... 26

Procedure..........................................................................................................................................................................................28

Overview........................................................................................................................................................................................... 30

Electrical troubleshooting.......................................................................................................................................................... 30

Sluggish operation........................................................................................................................................................................ 30

System operating hot...................................................................................................................................................................30

Excessive noise or vibration....................................................................................................................................................... 31

Motor operates normally in one direction only..................................................................................................................31

Improper output speed............................................................................................................................................................... 31

Low output torque........................................................................................................................................................................ 32

Optional threshold adjustment - Electric proportional controls................................................................................. 35

Optional threshold adjustment - Hydraulic proportional controls.............................................................................36

Pressure Compensator OverRide (PCOR) adjustment...................................................................................................... 37

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