TM 5-3810-300-24&P-3
Fuel Strainer and Filter
2.3
6. Place a new element over the center stud and push it down
gasket, the cover nut or bolt gasket, and, if used, the cover
against the element seat. Make sure the drain cock is closed,
bolt snap ring.
then fill the shell about two-thirds full with clean fuel oil.
NOTE: Current strainers and filters do not
NOTE: Thoroughly soak the density-type
incorporate the cover bolt snap ring. This
strainer element in clean fuel oil before
was eliminated to facilitate replacement of
installing it. This will expel any air entrapped
the bolt gasket with each element
in the element and is conducive to a faster
replacement.
initial start.
4. Wash the shell thoroughly with clean fuel oil and dry it with
7. Place a new shell gasket in the recess of the shell; also
compressed air.
place a new gasket on the cover nut or bolt.
5. Examine the element seat and the retaining ring to make
8. Place the shell and element in position under the cover.
sure they have not slipped out of place. Check the spring by
Then thread the cover bolt (or nut) in the center stud.
pressing on the element seat. When released, the seat must
return against the retaining ring.
9. With the shell and the gasket properly positioned, tighten
the cover bolt or nut just enough to prevent fuel leakage.
NOTE: The element seat, spring, washer
and seal can not be removed from the
10. Remove the pipe plug at the top of the cover and
strainer shell.
If necessary, the shell
complete filling of the shell with fuel. Fuel system primer J
assembly must be replaced. However, the
5956 may be used to prime the entire fuel system.
components of the filter shell are serviced.
Examine the filter retainer seal for cracks or
11. Start the engine and check the fuel system for leaks.
hardening. If necessary, replace the seal.
The current strainer and filter elements include the element,
the cover gasket and cover bolt gasket. The strainer element
also includes both the former and current bolt gaskets.
SPIN-ON TYPE FUEL FILTER
A spin-on type fuel strainer and fuel filter (Fig. 5) is used on
Filter Replacement
certain engines. The spin-on filter cartridge consists of a shell,
element and gasket combined into a unitized replacement
A 1 " diameter twelve-point nut on the bottom of the filter is
assembly (Fig. 6). No separate springs or seats are required
provided to facilitate removal and installation.
to support the filters.
Replace the filter as follows
The filter covers incorporate a threaded sleeve to accept the
spin-on filter cartridges. The word "Primary" is cast on the fuel
1. Unscrew the filter (or strainer) and discard it.
strainer cover and the word "Secondary" is cast on the fuel
filter cover for identification.
2. Fill a new filter replacement cartridge about two thirds full
with clean fuel oil. Coat the seal gasket lightly with clean fuel
No drain cocks are provided on the spin-on filters. Where
oil.
water is a problem, it is recommended that a water separator
be installed. Otherwise, residue may be drained by removing
3. Install the new filter assembly and tighten it to twothirds of a
and inverting the filter. Refill the filter with clean fuel oil before
turn beyond gasket contact.
reinstalling it.
4. Start the engine and check for leaks.
Page 190