c.
Secondary Fuel Pump Service (Model 687C-18-
ES)
(1) Remove drain plug (fig. 3-11) and drain
filter.
(2) Remove plug from center bolt; remove
center bolt and center bolt washer, then remove filter
body from cover.
(3) Remove disposable filter element and
washer and discard.
(4) Clean all parts with an approved cleaning
solvent and dry thoroughly. Be sure that all sludge and
foreign matter has been removed from filter body.
(5) Install new filter element in body; install
washer on cover, then install filter body in cover and
secure with center bolt washer and center bolt.
Caution:
Be sure that washer between cover
and body is serviceable and properly
installed, or an air leak will occur that
will starve fuel injection pump.
(6) Install plug in center bolt then install drain
plug.
Figure 3-11. Secondary fuel filter service (model
(7) Prime fuel system (para 871).
687C-18-ES).
d. Fuel Filter Service (Model DSS3TA).
(1) Close valve in fuel line from tank; remove
over filter element, and secure with gasket and nut.
drain plug (fig. 3-12); open ventvalve, and drain fuel
(7) After fuel line is connected to inlet port
filter.
prime filter with primer pump (para 3-71).
Figure 3-12. Fuel filter service an engine model
D333TA.
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