To prevent hardening and drying of
assembly immediately after removing
cleaning solvent that will not harm
non-ferrous metal. Finish cleaning by
(2) Repair damaged tubes, by inserting a smaller
OD tube inside damaged tube. Cut and flare
ends, then solder securely. Do not restrict more
than 5 percent of total number of tubes in this
manner. If more than 5 percent of tubes are
defective, discard cooler.
(3) To assemble the lubricating oil cooler, install
new gasket (38), cover (36), new washers (27),
new gasket (38), new gasket (29), connection
(28), and new screws (25), (26) and (33).
Bypass Oil Filters. The bypass oil filters are located
on a bracket mounted over the starter motor
assembly on the right side of the engine. Service
the bypass oil filters by replacement as follows:
(1) Clean filter case. Handle or store in a manner
to prevent out-of-round.
(2) Insert new element in filter case, seating it
securely on bottom.
(3) Fill element with proper lubricating oil. Refer to
table 3-1 of the Operator/ Crew and Organizational
(4) Install new top gasket, position filter case, and
tighten clamps securely.
(5) Run engine, check for leaks, recheck engine oil
level; add oil as necessary to bring oil level to FULL
mark on oil level gauge (dipstick).
Always allow oil to drain back to oil
pan before checking level. This may
require several minutes.
13-12. BYPASS VALVE. To inspect, test, replace, and
repair the lubricating oil filter bypass (relief) valve, refer
to figure 13-14, and proceed as follows:
(1) Drain the engine oil and remove the oil filters
(13) in accordance with the Operator/Crew and
Organizational Maintenance manual.
(2) Remove oil transfer tube (3) and discard O-ring
(3) Remove capscrews (1) and washers (2).
(4) Remove capscrews (5), capscrews (6), and
washers (7); discard gasket (11).
LEGEND FOR FIGURE 13-14