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 TM 55-1905-223-24-3
FIGURE 3-12. Oil Cooler Pressure Regulator.
REPAIR
a.
Check the regulator plunger, (2, Figure 3-12).
(1)
Inspect the plunger (2) for scratches or other damage.
(2)
If scratch is deep enough to be felt with a fingernail, replace the plunger.
(3)
Inspect helical compression spring (3) for damaged or broken coils. Replace if damaged.
(4)
Use a valve spring compressor to compress the helical compression spring (3) to 1.820 inches (46.23
mm). The force required must be between 22 and 26 pounds. Replace if necessary.
b.
Clean and inspect the cooler element (fluid transmission center) (3, Figure 3-11) as follows:
WARNING
The fumes from the cleaning solution are dangerous. Use the solution in open air or in
a room that has proper ventilation. Wear safety glasses and gloves.
(1)
Put the element (3) into a container of an approved cleaning solvent. Keep the element in the solution
for several minutes. Flush the solution around and through the tubes in the element.
3-37
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