TM 5-3810-300-24&P-3
and the adapter or base. Also make
sure the gasket surfaces of the shell and
the adapter 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 adapter or base and tighten the stud to
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
Fig. 5. By-Pass Valve
corrected and the engine has been stopped long
enough (approximately ten minutes) for the oil
3. Remove the center stud and gasket. Retain the
from various parts of the engine to drain back to
gasket unless it is damaged and oil leaks
the crankcase, add sufficient oil to bring it to the
occurred.
proper level on the dipstick.
4. Remove the nut or snap ring on the full-flow filter
Remove and Install By-Pass Valve
center stud.
1. If necessary, remove the filter adapter from the
NOTE: The center stud on the current
engine.
full-flow oil filter has been revised by
removing the snap ring groove and
2. Remove the plug and gasket and withdraw the
increasing the 5/8"-18 thread length
approximately 1/2". To conform with this
change, a 5/8"-18 nut replaces the snap
3. Wash all of the parts in clean fuel oil and dry
ring formerly used to retain the filter
them with compressed air.
spring and seal.
4. Inspect the parts for wear. If necessary, install
5. Examine the element retainer seal (Fig. 3) for
new parts.
hardening or cracks. If necessary, replace the
seal.
5. Reassemble and install the by-pass valve. Use
only the current by-pass valve and spring (Fig. 5)
6. Clean the filter shell and the adapter or base.
for service. The current thicker valve and stiffer
spring increase the by-pass pressure from 13-18
7. Install the center stud gasket and slide the stud
psi to 18-21 psi to permit more efficient filtration.
(with the spring, washer, seal and retainer
installed on the full-flow filter stud) through the
NOTE: The current and early design
filter shell.
(inset, Fig. 3) by-pass valves are not
interchangeable.
8. Install a new shell gasket in the filter adapter or
base.
6. Use a new gasket and install the filter adapter.
NOTE: Before installing the filter shell
gasket, be sure all of the old gasket
material is removed from the filter shell
PAGE 292