Table Of Contents - Danfoss 51 Series Service Manual

Bent axis motors two position controls

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Service manual (64 pages)

Repair instructions (36 pages)

Service kit instructions (2 pages)

Table Of Contents

Table of Contents

Service Manual

Contents

Introduction

Operation

Pressure measurements

Adjustments

Pressure Compensator Override (PCOR)

Multifunction Block

T1, T2, T3, T4, TA, TH, TM, TN

Series 51 Two Position Controls Service Manual

Safety Precautions............................................................................................................................................................................5

Unintended Machine Movement..........................................................................................................................................5

Flammable Cleaning Solvents................................................................................................................................................5

Fluid Under Pressure..................................................................................................................................................................5

Personal Safety.............................................................................................................................................................................5

Hazardous Material.....................................................................................................................................................................5

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

Overview..............................................................................................................................................................................................7

General instructions........................................................................................................................................................................ 7

Keep it Clean................................................................................................................................................................................. 7

Inspect for System Contamination....................................................................................................................................... 7

Replace the O-rings and Gaskets...........................................................................................................................................7

Lubricate all Moving Parts........................................................................................................................................................7

Torque Procedure....................................................................................................................................................................... 7

Two-position Controls.................................................................................................................................................................... 8

Control Options.................................................................................................................................................................................8

Pressure Compensator Override (PCOR) Option............................................................................................................. 8

Brake Pressure Defeat (BPD)....................................................................................................................................................9

Threshold Spring.......................................................................................................................................................................11

Multifunction Block..................................................................................................................................................................11

Port Locations and Gauge Installation................................................................................................................................... 13

Threshold Setting...........................................................................................................................................................................16

Adjusting Threshold Setting.................................................................................................................................................16

PCOR Setting....................................................................................................................................................................................16

PCOR Adjustment.....................................................................................................................................................................16

Checking PCOR Setting on a Test Stand.......................................................................................................................... 17

Adjusting the PCOR Setting..................................................................................................................................................17

Repair..................................................................................................................................................................................................18

Disassembly................................................................................................................................................................................18

Inspection....................................................................................................................................................................................18

Assembly......................................................................................................................................................................................18

Disassembly................................................................................................................................................................................20

Inspection....................................................................................................................................................................................21

Assembly......................................................................................................................................................................................21

Operation..........................................................................................................................................................................................22

TA Control....................................................................................................................................................................................22

TH Control................................................................................................................................................................................... 22

T1, T2, T3, T4 Control............................................................................................................................................................... 22

TM, TN Controls......................................................................................................................................................................... 22

N Module Option Codes.............................................................................................................................................................. 22

Overview......................................................................................................................................................................................22

C0/C3 3......................................................................................................................................................................................... 22

C2/C4.............................................................................................................................................................................................23

C7/C8.............................................................................................................................................................................................23

L5/L6..............................................................................................................................................................................................23

R5/R6............................................................................................................................................................................................. 23

E7, E8, F7, F8................................................................................................................................................................................23

Schematic Diagrams..................................................................................................................................................................... 23

11009442 • Rev CA • January 2015