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3.
Before fully tightening these screws, the rocker arm must be actuated to and held in the "full stroke" position. This is done to ensure that the
diaphragm will be pulled to and held in its maximum working (flexed) position while the retaining screws are torqued tight (20-25 in/lbs.). This
procedure will ensure against premature diaphragm wear and subsequent failure due to over-stretching of the diaphragm material when in the
full stroke position. Another by-product of an improperly set diaphragm is erratic fuel flow and pressure.
NOTE: This procedure can be assisted by holding the fuel pump in a vise or appropriate fixture, and holding the rocker arm down with
a pipe or similar tool.
4.
The ten allen head retainer screws should then be torqued to their 20-25 in/lbs. specification in a criss-cross or "star" pattern, to ensure even,
progressive tightening.
CAUTION: Do not overtorque these allen capscrews or serious pump diaphragm damage will occur.
5.
After installing the fuel pump, run the engine and check for fuel leaks and proper operation. If leaks exist, stop engine
immediately and correct any leaks BEFORE any further engine operation.
Catalog #1721, 1722, 1725, 1726
Rev. 4/06 - RS/mc
EXPLODED VIEW OF EDELBROCK FUEL PUMPS
(1)
Diaphragm and Pull Rod Assembly
(2)
Pulsator Diaphragm
(3)
Diaphragm Spring
(4)
Mounting Gasket
(5)
Valve
(6)
Valve Gasket
(7)
Valve Retainer
Edelbrock Corporation • 2700 California St. • Torrance, CA 90503
Tech-Line: 1-800-416-8628 • E-Mail: Edelbrock@Edelbrock.com
(8)
Rocker Arm Pin
(9)
Rocket Arm Lockwasher
(10) Rocker Arm Linkage
(11) Rocker Arm Spring
(12) Oil Seal
(13) Oil Seal Retainer
(14) Bushing
2 / 6
©2006 Edelbrock Corporation
Brochure #63-1721
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