Chevrolet 10 Series 1968, Service Manual, Page: 419 / 713

ENGINE FUEL 6M-26
other hand insert the vacuum diaphragm pull rod
through oil seal. Have flat of pull rod parallel to
vacuum links.
CA U TIO N : Be extremely careful when insert-
ing diaphragm push rod through seal to avoid
damaging seal.
23. Let up slightly on pump and turn diaphragm 90 so
that pull rod rolls onto link (fig. 8P).
24. Lift diaphragm cloth and position valve and cage in
recess close to mounting flange. No gasket is re­
quired because the diaphragm seals the valve cage.
25. Before installing vacuum cover, rocker arm must be
positioned so that vacuum diaphragm will be held
level with the body flange while the vacuum cover is
installed. This can be done by inserting a 3/32 inch
piece of metal between rocker arm stop and body.
This tool can be made from a piece of steel 3/16” x
3/32" x 6” . Bend one end to form a right angle 3/8"
from bend to end.
26. Place spring retainer on riveted end of diaphragm
pull rod and place the diaphragm spring on the re­
tainer. Place vacuum cover over spring and align
holes.
27. Press vacuum cover firmly down against diaphragm
and body flange and install two screws diametrically
opposite. (Two 10-32NF x 1-1/2" screws may be
installed to pull vacuum cover down.) Install re­
maining vacuum cover screws and tighten until
screws just engage lockwashers.
28. Release rocker arm to allow heavy vacuum spring to
push diaphragm to flexing stop in body. Tighten all
cover screws securely.
SPECIAL TOOLS
0176
S \ ^
J —11 37
J —4552
J-6 0 5 8 A
J —5496
ill
BENDING TOOLS
J
22973
J —6556
F ig . IT - Engine Fuel Special Tools
CHEVROLET TRUCK SERVICE MANUAL