Woodward PSG Governor operating and Workshop service Book

Woodward PSG Governor operating and Workshop service Book

BULLETIN 37013A

PSG GOVERNOR

OPERATING AND SERVICE MANUAL

BULLETIN 37013A

Section Title Page

SECTION I/GENERAL INFORMATION AND INSTALLATION

Section Title Page

Parts Cleaning 17

Introduction 2 Parts Check 17

General Information 2 Parts Repair 18

Overspeed 2 Assembly 18

Installation 2 Testing 24

Speed Adjustment 2

Speed Droop 3 SECTION IV/REPLACEABLE PARTS

Initial Operation and Adjustment 3 Introduction 25

Storage 3 Replacement Parts Information 25

Illustrated Parts Breakdown 25

SECTION II/PRINCIPLES OF OPERATION

I ntroduction 5 SECTION V/AUXILIARY EQUIPMENT

Operation 5 Introduction 29

Spring Driven-Oil Damped Ballhead 29

SECTION III/MAINTENANCE Torsion Spring 32

Introduction 8 Pneumatic Speed Setting 32

Troubleshooting 8 Speed Adjusting Motor 40

Speed Droop Adjustment 14 Externally Adjusted Speed Droop 42

Removal of Governor from Engine 15 Internal Return Spring 44

Tools for Disassembly & Assembly 15 Temperature Compensated Needle Valve 49

Disassembly of Governor 15 Fuel Rod 49

LIST OF ILLUSTRATIONS

Figure Title Page Figure Title Page

1-1 External Features of Basic PSG 1 3-16 Buffer System Assembly 20

1-2 Outline Drawing, Basic PSG 4 3-17 Power Piston Assembly 20

2-1 Cutaway Schematic, Basic PSG 6 3-18 Ballhead Installation 20

2-2 Schematic Diagram, PSG with 3-19 Thrust Bearing & Speeder

External Return Spring 7 Spring Parts 20

3-1 Droop Adjustment 14 3-20 Thrust Bearing & Spring Seat Assembly 21

3-2 Assembly Tools 15 3-21 Spring Seat Adjustment 21

3-3 Terminal Shaft Removal 16 3-22 Centering the Pilot Valve Plunger 21

3-4 Speeder Spring Removal 16 3-23 Torquing Lock Nut 21

3-5 Pilot Valve Disassembly 16 3-24 Centering Pilot Valve Plunger 22

3-6 Removal of Ballhead 17 3-25 Speeder Spring Installation 22

3-7 Check Valve Assembly 18 3-26 Terminal Lever & Terminal Shaft

3-8 Honing Idler Gear 18 Parts Layout 22

3-9 Honing Pilot Valve Bushing Gear 19 3-27 Droop Bracket Assembly 22

3-10 Plugs Inserted for CCW Rotation 19 3-28 Setting Zero Droop 22

3-11 Plugs Inserted for CW Rotation 19 3-29 Speed Adjusting Parts Layout 22

3-12 Pilot Valve Bushing Assembly 19 3-30 Speed Adjusting & Floating

3-13 Compensating Bushing Assembly 19 Lever Assembly 23

3-14 Seating Retaining Ring 19 3-31 Bending Spring Wire Pin 23

3-15 Base to Case Assembly 20 3-32 Seal Installation 23

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