Eaton Vickers SA4-03 1 Series Overhaul Manual Download | Manualshive

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I-3060-S

Revised 9/1/87

Two-Stage Servo Valves

SA4-03-**-***-1*
SA4-06-**-***-1*

Overhaul Manual

Vickers

®

Servo Valves

1
2
3
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Summary of Contents for Vickers SA4-03 1 Series

Page 1: ...I 3060 S Revised 9 1 87 Two Stage Servo Valves SA4 03 1 SA4 06 1 Overhaul Manual Vickers Servo Valves...

Page 2: ...n 5 A System Control 5 B Amplifier 5 C Servo Valve 5 V Installation 6 A Flushing 6 B Mounting 6 C Hydraulic Fluid Recommendations 6 D Electrical Connection 6 E Start up 7 F Null Adjustment 7 G Linkage...

Page 3: ...3 EEaton Hydraulics Incorporated 2000 All Rights Reserved...

Page 4: ...verhaul information for the SA4 Series Servo Valve Units are identified on the nameplate Figure 1 schematically illustrates the construction in cross section Servo valves are comprised of a rectangula...

Page 5: ...ure is always present against the 1A end area of the main spool Since the 2A end area of the main spool is twice that of the effective area on the 1A end the same pressure on both ends or greater area...

Page 6: ...vo may be attached directly to a prepared flat ported face of the work unit The sub plate SVGM2 03 10 or SVGM2 06 10 permits pipe connections with the work unit Manifolds SVGM1 03 10 SVGM5 06 11 and S...

Page 7: ...tolerance within the valve To accomplish this it is necessary to keep the pilot spool moving within the deadband of the valve In every application dither of 60 400 cycles must be applied to the pilot...

Page 8: ...d adjust the pilot spool for center at the torque motor armature nut with a 3 64 Allen wrench Replace the cover and trim if necessary as outlined in null adjustment paragraph page 7 Reassembly is in r...

Page 9: ...pilot spool Refer to page 8 y direction One torque motor coil inoperative With the amplifier or signal source turned off check the torque motor coils for either an open or shorted condition by placing...

Page 10: ...ne coil and across pins C and D for the other Check all four pins to ground Servo valve mounting bolts too tight Loosen the four servo valve mounting bolts and tighten to the values specified in Secti...

Page 11: ...Spool S A 1 1 1 1 1 1 1 1 1 21 214319 Pilot Spool Slv 1 1 1 1 1 1 1 1 1 22 7076 Pipe Plug 1 1 1 1 1 1 1 1 1 23 225199 Plug 1 1 1 1 1 1 1 1 1 24 223055 Spring 1 1 1 1 1 1 1 1 1 25 177850 Screw 3 3 3 3...

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