Table Of Contents - Danfoss 51 Series Repair Instructions

Bent axis motors

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Service manual (64 pages)

Service kit instructions (2 pages)

Service manual (40 pages)

Table Of Contents

Table of Contents

Repair Instructions

Contents

Introduction

Disassembly

Inspection

Assembly

Series 51 and 51-1 Bent Axis Motors Repair Instructions

Overview..............................................................................................................................................................................................4

General instructions........................................................................................................................................................................ 4

Remove the unit.......................................................................................................................................................................... 4

Keep it clean..................................................................................................................................................................................4

Lubricate moving parts.............................................................................................................................................................4

Replace all O-rings and gaskets............................................................................................................................................. 4

Secure the unit............................................................................................................................................................................. 5

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

Unintended machine movement..........................................................................................................................................5

Flammable cleaning solvents................................................................................................................................................. 5

Fluid under pressure.................................................................................................................................................................. 5

Personal safety............................................................................................................................................................................. 5

Symbols used in Danfoss literature............................................................................................................................................6

Section diagram................................................................................................................................................................................7

Endcap..................................................................................................................................................................................................8

Rotating components..................................................................................................................................................................... 9

Shaft removal (SAE or DIN)......................................................................................................................................................... 10

Shaft removal (Cartridge)............................................................................................................................................................11

Endcap disassembly......................................................................................................................................................................12

060 frame.....................................................................................................................................................................................12

080 frame.....................................................................................................................................................................................13

110 - 250 frame..........................................................................................................................................................................13

All frame sizes.............................................................................................................................................................................14

51-1 Endcap................................................................................................................................................................................ 14

Shaft assembly................................................................................................................................................................................ 16

Piston rings.......................................................................................................................................................................................16

Bearing plate, valve segment, and cylinder block............................................................................................................. 17

Endcap assembly............................................................................................................................................................................19

All frame sizes.............................................................................................................................................................................19

060 frame.....................................................................................................................................................................................19

080 frame.....................................................................................................................................................................................19

110-250 frames..........................................................................................................................................................................20

All frame sizes.............................................................................................................................................................................21

Shaft and mounting flange assembly.....................................................................................................................................22

SAE/DIN flange.......................................................................................................................................................................... 22

Cartridge flange........................................................................................................................................................................ 23

Cylinder block and synchronizing shaft.................................................................................................................................25

Synchronizing shaft and rollers........................................................................................................................................... 25

Cylinder block............................................................................................................................................................................ 27

Bearing plate and valve segment.............................................................................................................................................29

Bearing plate.............................................................................................................................................................................. 29

Endcap installation........................................................................................................................................................................ 30

11009449 • Rev BA • December 2014