NOTE When fuel shutoff solenoid is removed, rack bars move into “fuel- on” position. This is necessary to set and check the synchronization. 13. Remove fuel shutoff solenoid (WP 0050 00). NOTE The limit screw on control linkage positioning tool is used to establish a synchronizing reference at No. 1 injector. Once reference is established, proceed to check and adjust all other injectors to match No. 1 injector. Ensure limit screw remains seated against cylinder head while adjusting horizontal dial indicator. 14. Loosen limit screw on control linkage positioning tool until horizontal dial indicator reads 4.0 mm. 15. Tighten Allen-head setscrew on control linkage positioning tool. 16. Move control linkage positioning tool toward push rod side of engine and hold. Ensure horizontal dial indicator reads double zero. a. If horizontal dial indicator reads double zero, go to step 18. b. If horizontal dial indicator does not read double zero, go to step 17. NOTE Assistant will help with step 17. 17. While holding control linkage positioning tool toward push rod side of engine, set double zero on horizontal dial indicator. a. Loosen red thumb screw on side of holding fixture and slide horizontal dial indicator laterally until small needle lines up on zero. Tighten red thumb screw. b. Loosen bezel screw on horizontal dial indicator and turn bezel until large needle lines up on zero. Tighten bezel screw. 18. Move control linkage positioning tool toward injector side of engine. Ensure horizontal dial indicator reads 4.0 mm and limit screw is seated against cylinder head. a. If horizontal dial indicator reads 4.0 mm, go to step 22. b. If horizontal dial indicator does not read 4.0 mm, go to step 19. 19. Loosen Allen-head setscrew on control linkage positioning tool. 20. Loosen limit screw on control linkage positioning tool until horizontal dial indicator reads 4.0 mm. Ensure limit screw is seated against cylinder head while adjusting horizontal dial indicator. 21. Tighten Allen-head setscrew on control linkage positioning tool. CAUTION After the syncronization reference of double zero and 4.0 mm is established, do not adjust limit screw until syncronization is completed. 22. Pull and release control linkage positioning tool several times to ensure horizontal dial indicator reads double zero on push rod side and 4.0 mm on injector side. a. To reset double zero, repeat steps 17 through 22. b. To reset 4.0 mm ± 0.02 mm, repeat steps 18 through 22. 23. Remove holding fixture with dial indicators from injector by pressing top ball on pivot arm of holding fixture fully and pulling holding fixture straight up. CAUTION Bottom contact point on pivot arm of holding fixture arm must clear end of rack bar when inserted into engine. Failure to do so will cause damage to equipment and result in an inaccurate reading. 0321 00-6 TM 9-2320-386-24-1-2 0321 00 FUEL INJECTOR SYNCHRONIZATION MAINTENANCE (Contd)