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Page 6 SB-2-540
12. Fit Valve Seat to Gunbody. 13. Remove Rear Airvalve Seal
from housing (10) with a
hooked instrument.
14. Fit new Seal to Service Tool.
15. Fit Seal to Housing (10). 16. Replace Valve (11). 17. Replace Valve Spring and
screw in Housing (10).
18. Tighten Housing. 19. Fit Needle (9). 20. Fit Spring (8) and Knob (7).
21. Adjust Needle Packing (4)
with Spanner sufficient to
seal but to allow free move-
ment of needle. Lubricate
with gun oil.