TM 5-3895-346-14
ENGINE OVERHAUL
OIL FILTERS
Replace Oil Filter Element
Replace the element in either the full- flow or bypass-type oil filter assembly (Fig. 2) as follows:
1. Remove the drain plug from the filter shell or the filter adaptor or base and drain the oil. If a type S-6 filter
assembly is used, oil may be re- moved with a sump pump after the cover and element are removed.
2. Back out the center stud or the cover nut and withdraw the shell, element and stud as an assembly. Discard
the element and the shell gasket.
3. Remove the center stud and gasket. Retain the gasket unless it is damaged and oil leaks occurred.
4. Remove the nut or snapring on the full-flow filter center stud.
NOTE
The center stud on the current full-flow oil filter has been revised
by removing the snapring groove and increasing the 5/8-18 inch
thread length approximately 1/2 inch. To conform with this
change, a 5/8-18 inch nut replaces the snapring formerly used to
retain the filter spring and seal.
5. Remove and discard the element retainer seal (Fig. 2). Install a new seal.
6. Clean the filter shell and the adaptor or base.
7. Install the center stud gasket and slide the stud (with the spring, washer, seal, and retainer installed on the
full-flow filter) through the filter shell.
8. Install a new shell gasket in the filter adaptor or base.
CAUTION
Before installing the filter shell gasket, be sure all of the old gasket material is removed from the filter shell and
the filter adaptor or base. Also make sure the gasket surfaces of the shell and the adaptor or base have no
nicks, burrs, or other damage.
9. Position the new filter element carefully over the center stud and within the shell. Then place the shell,
element, and stud assembly in position on the filter adaptor or base and tighten the stud to 50-60 lb ft (68-81
Nm) torque.
10. Install the drain plug.
11. Start and run the engine for a short period and check for oil leaks. After any oil leaks have been corrected
and the engine has been stopped long enough (approximately 20 minutes) for the oil from various parts of the
engine to drain back to the crankcase, add sufficient oil to bring it to the proper level on the dipstick.
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