Eaton Vickers SF4-140-20-002-10 Overhaul Manual
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Eaton Vickers SF4-140-20-002-10 Overhaul Manual

Eaton Vickers SF4-140-20-002-10 Overhaul Manual

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Vickers
Overhaul Manual
Valves
Two-Stage Flapper Type Servo Valve
SF4-140-20-002-10
SF4-100-30-002-10
Revised 02/01/74
I-3063-S

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Summary of Contents for Eaton Vickers SF4-140-20-002-10

  • Page 1 ® Vickers Overhaul Manual Valves Two-Stage Flapper Type Servo Valve SF4-140-20-002-10 SF4-100-30-002-10 Revised 02/01/74 I-3063-S...

  • Page 2: Table Of Contents

    Table of Contents Section Page I. Introduction ................... . . A.

  • Page 3: Introduction

    Section I – Introduction A. Reference Material B. Kits Installation dimensions and operating specifications are not A gasket kit is available for this servo valve. It is recom- contained in this manual. Refer to installation drawing mended that new O-Rings and gaskets be used during 501170 for that information.
  • Page 4 Legend for Figures 1 thru 4 Index Part Name Qty. Number Number 199811 O-Ring 207892 Screw 376706 Cover 323926 Gasket 174638 Screw – Nameplate 286122 Gasket 353860 Screw 353859 Clamp 42590 Screw 68904 Washer 344966 Screw and Lock Washer S/A 323931 Armature Flapper 351042...

  • Page 5: Overhaul

    Section II – Overhaul A. Unit Removal Washer Washer Adjusting Screw WARNING Turn off all electrical power and relieve hydraulic pressure. Block any load that could generate pressure. 1. Remove the unit from the system. 2. Cap all system openings to prevent entry of dirt. Lock B.

  • Page 6: Assembly

    2. Check the 0.060 hole in the nozzle (20). b. Install adjusting screw (25) thru the adapter (26), attach standard nut (24) and washer (23) and turn the nut on 3. Check frame (22) for cracks or distortion. until it bottoms against the shoulder of the adjusting screw. See Figures 2 and 3.
  • Page 7 Holes must be clean Orifice Plug See Note: Note: Grip here if orifice plug must be removed to clean inside of spool. Figure 5. Spool Subassembly f. Place a 0.010 shim between the flapper armature (13) 6. Assemble the feedback spring (14) to the flapper and the nozzle (20) while tightening the two holding screws armature by twisting the spring over the extrusion until the and lockwashers (12).

  • Page 8: Unit Installation

    3.00 1.438 2.130 0.2812 Drill thru 1.000 2.120 1.067 4 holes Stock 1.057 0.4219 Drill - 2.72 deep 1/4 NPT thread 1.817 2.44 1.567 1.807 1.557 0.610 Dia. 0.615 0.536 0.526 0.844 0.015 R 3 Places Max. 0.943 0.312 0.943 0.045 0.933 0.933...

  • Page 9: Test Procedure

    Section III – Test Procedure A. Test 1. Utilize your present control system to test the servo valve as follows: – – 0-500 – CAUTION Servo Command Coil System Check polarity of 0-500 milliammeter with system polarity prior to installation to prevent meter damage. a.

This manual is also suitable for:

Vickers sf4-100-30-002-10

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