Electromech Technologies SB 484-3: No revision named, text

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Page 1OCROpen in PDF

SB 484-3 AB

SERVICE BULLETIN

FOR THE

ELECTROMECH TECHNOLOGIES EM484-3 FUEL SHUTOFF VALVE

Page 2OCROpen in PDF

ELECTROMECH TECHNOLOGIES SB 484-3 AB 2600 SOUTH CUSTER PAGE 1 OF 5 WICHITA, KS 67217 FEBRUARY 18, 2003 REV. _N/C

SERVICE BULLETIN RELEASE AND REVISION RECORD PREPARED: DATE: 2-19-03 Er Tube Q.C. APPROVAL: .. _ ENGR APPROVAL I Steen

REVISION STATUS SYMBOL REVISED SHEET NO'S. BY APPROVED EON NO DATE

LATEST REVISION - EACH SHEET 2 5 12 13 14 15 16

N/C NIC NIC NIC N/C 17 18 19 20 21 22 23 24 25 26 28 29 30 32 32

Page 3OCROpen in PDF

ELECTROMECH TECHNOLOGIES SB 484-3 AB 2600 SOUTH CUSTER PAGE 2 OF 5 WICHITA, KS 6/217 FEBRUARY 18. 2003 REV. NIC

1.0 SCOPE This service bulletin specitically defines the inspection required for certain EM484-3 fuel valves to verify that the valve has been modified in accordance with SB 484-3. The valve inspection involves checking for the presence of a relief hole located in the interal valve body cavity.

2.0 APPLICATION AND EFFECTIVITY The inspection described within this service bulletin applies specifically 10 EM484-3 fuel shutoff valves with serial numbers listed in the table below. This service bulletin inspection is intended to be incorporated immediately. The intent of the procedure is to allow authorized personnel in the field or at the manufac turer to perform the inspection. Upon satisfactory completion of the rework, the units will be identified with a 'B" suffix added to the serial number next to the existing "A" suffix. Valves to be inspected by the manufaclurer should be shipped to:

Electromech Technologies 2600 S. Custer Wichita, KS 67217-9960 Attn: Encore Director 166A 204A 22BA 251A 272A 167A 206A 230A 252A 273A 172A 207A 231A 253A 274A 173A 208A 232A 254A 275A 174A 209A 233A 255A 2764 176 210A 234A 256A 277A 177A 211A 235A 257A 279A 178A 212 236A 256A 280A 181A 214A 237A 259 281A 182 215A 2394 260 284A 184A 217A 240A 261A 286A 185A 218A 241A 262A 287A 186A 219A 242A 263A 2884 188A 220A 243 264A 289A 189A 221A 244A 265A 190A ZEZA 245A 266 295A 192A 223A 246A 267A 296A 193A 224A 247A 266A 299A 191A 225A 248A 269 300A 201A 2264 249A 270A 301A 203A 227A 250A 271A 302A

Page 4OCROpen in PDF

ELECTROMECH TECHNOLOGIES SB 484-3 AB 2600 SOUTH CUSTER PAGE 4 OF 5 WICHITA, KS 67217 FEBRUARY 18, 2003 REV. _N/C

5.0 VALVE BODY INSPECTION

5.1 Verify the presence of a relief hole located in the center bore of the valve body, adjacent to the pressure relief port (port "C"). See figure 2.

5.2 If no relief hole is present, the valve must be reworked in accordance with service bulletin SB 484-3.

RESSURE RELIEF ASS PORT PORT

SECTION SCALE 2:1

RELEF HOLE LOCATION FIGURE 2

Page 5OCROpen in PDF

ELECTHOMECH TECHNOLOGIES 8B 484-3 AB 2600 SOUTH CUSTER PAGE 5 OF 5 WICHITA, KS 67217 FEBRUARY 18, 2003 REV. _N/C

6.0 VALVE REASSEMBLY Inspect o-rings for any wear or damage and replace as needed. Reinstall all o-rings on the valve body seal as shown in figure 3. O-ring order is critical for proper valve operation.

6.2 Install the valve body seal into the valve body on the side opposite the motor and gearbox. The Teflon o-ring will be in contact with the gate slide.

TEFLON O-RING

O-RING-

- BUNA-N O-RING

SECTION A-A FIGURE 3

7.0 VALVE TESTING Functional test the inspected valve assembly per the valve test procedure speci fied in the EM484 Component Maintenance Manual.

8.0 VALVE IDENTIFICATION Reidentify the inspected and tested valves by placing a "B" suffix onto the serial number next to the existing "A" suffix (Eg. - 164AB).